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Explanation Text_2
For my beloved students
Since we need to do virtual learning, we keep communicate via this blog. I have posted some about explanation text topic, and you have sent me the best respond. Check this out
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Syarifatul Fatimah - XI MIPA 4
BalasHapusEarthquakes
• An earthquake is a sudden shaking or trembling of some region of the earth for a very short time.
• An earthquake is normally caused by a disturbance originated inside the earth’s crust.
• Earthquakes keep occurring almost all the time, all over the earth, but most of them are not even noticeable.
• The major earthquakes are rare, but very much destructive.
• The earthquakes mostly are caused by the movement of earth’s plates
• The power of an earthquake is expressed in terms of a magnitude and measured on a scale known as Richter scale.
• The earthquake, which magnitude is higher than 7 on the Richter scale, is highly destructive.
Khairana Aisha Bachtiar - XI MIPA 4
BalasHapusTsunami
• The word “Tsunami” itself is derived from the Japan which means a huge wave (Tsu: ports and Nami: wave).
• tsunami is a natural disaster caused by the rising tide of the sea to the Mainland with a high speed due to the earthquake which was centered under the ocean.
• Tsunami always starts a movement of terrific that customarily we call the earthquake.
• The quake could have been caused by a landslide, ground plates shifted, a volcano erupts and the meteor that crashed in the ocean.
• 90% of the tsunami caused by the movement of the plates in the belly of the Earth happens to be located there in the ocean.
• If we observe the process of occurrence of tsunamis, of course we understand that there is no human intervention in it.
I Made krisna - XI MIPA 4
BalasHapus(Aurora)
> An aurora is a natural light display that shimmers in the sky.
> Auroras are visible almost every night near the Arctic and Antarctic Circles, which are about 66.5 degrees north and south of the Equator.
> The aurora phenomenon occurs when the solar wind (a stream of electrons and protons which are released from the sun due to the high kinetic energy) is produced by the sun.
> The colors of the aurora vary, depending on altitude and the kind of atoms involved.
> Aurora can only be found in the earth’s poles because the north and South Pole magnetic field is very strong compared to other regions.
> However, sometimes the Aurora can also appear at the top of the mountain in a tropical climate, but this phenomenon is extremely rare.
Savira Zain Laeli - XI MIPA 4
BalasHapus(How Do Seasons Happen?)
• The season comes to us regularly.
• Seasonal changes occur due to the earth's rotation around the sun.
• During summer the earth tilts toward the sun, making some of the earth hotter.
• During winter the earth tilts away from the sun as a result making some of the earth colder for the other half year.
• Different parts of the earth have the same season at different times.
• On earth in the north, winter occurs during December, January, and February. For example, North America and Europe.
• In the southern hemisphere winter occurs during June, July, and August. For example South America and Australia.
• The same season occurs at different times because the top and bottom of the earth tilt away from the sun at different times.
Salsabila Nur Fadila - XI MIPA 4
BalasHapusRainbow
- Rainbow accours because of the refraction
- because the process between rain drops is refracted it’s produce the spectrum of colors ( red , orange , yellow , green , blue , indigo and violet)
- the amount of light refrected depends on wavelenght , and hance
- the light coming out from the back of raindrops do not create a rainbow because the raindrop do not have a maximum of intensity (the colours will be blend together and do not create rainbow)
- because of the colours reflect in the back drop of the rain resulting the light which looks like arched and become rainbow
- the rainbow only can be seen depending of observer’s viewpoint as droplets of light illuminated by the sun
- Seawater has a higher refractive index than rain water, so the radius of a "rainbow" in sea spray is smaller than a true rainbow.
Rizky Hidayat - XI MIPA 4
BalasHapusHow does Rain Fall?
1. Rain is one of the main sources of fresh water for almost all people in the world.
2. The rain’s phenomenon is actually what we often call as “water circle.”
3. there is 3 water cycle type, the long one, the medium one, and the short one
4. The concept of the water cycle involves the sun heating the Earth’s surface water and causing the surface water to evaporate.
5. Then the water vapor rises into the Earth’s atmosphere. The water in the atmosphere cools and condenses into liquid droplets.
6. not all rain can reach the surface of the earth
7. Some evaporates while falling through dry air. This is what we call as “virga”.
Anastasia Raiza - XI MIPA 4
BalasHapusRainbow
- A rainbow is a natural phenomenon caused by the refraction and reflection of light in droplets of water, which results in the appearance of a spectrum of light in the sky.
- A rainbow is a bunch of raindrops hanging in the atmosphere that divide the sunlight into 7 colors, like a prism.
- Rainbow usually occurs when rain or drizzle after heavy rain stopped.
- Rainbow happen to begin when the sunlight passing through the raindrops.
- We can only see a maximum of a half circle rainbow. To see the full rainbow of the circle, then we must stand on higher ground.
- Because rainbow created involving distance observer with water droplets, then the rainbow always move to follow the movement of the observer.
- The colors in a rainbow are those found in the color spectrum of white light as it divides.
- There are 7 main colors that you can see in a rainbow : red, orange, yellow, green, blue, indigo and purple. When the sunlight hits the water droplets, the 7 colors appear.
Melly Marcelia Aziza - XI MIPA 4
BalasHapusAurora
• An aurora is a natural phenomenon, caused by an interaction between magnetic medan with charged particles emitted from the Sun (solar wind).
• Aurora's first cause is due to atoms growing colliding with charged particles, especially electrons and protons originating from the sun.
• After that, particles are thrown within the speeds of more than 500 miles per second, absorbed by the earth's magnetic field.
• Despite that, Aurora was a reaction between the solar wind particles with the Earth's athmosphere that caused the colorful gleams of aurora.
• However, this color difference is influenced by the type of atoms that interact with protons and electrons, considering the heights of atoms which aren't all the same.
• Last but not least, the dynamic colors in the sky. Electrical pressure releases a gas molecule into a more energized state.
• The effects of Aurora is not dangerous. In the end, it is one of the attractive-looking phenomenon to be seen.
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BalasHapusChristofer Ardin Purnomo - XI MIPA 4
BalasHapusHow Venus Eclipse Happens
1.Venus eclipses occurs when the position of the earth, moon and Venus is parallel.
2. Venus planet will slowly disappear for a moment because it is covered the surface of the Moon.
3. Venus eclipse is like Sun eclipse.
4.The moon and planets are sharing a similar apparent path in the sky.
5.most people don’t see these events because they are visible in the evening sky only half the time
Abigiel Pudja Dewi Utomo XI MIPA 4
BalasHapus(Geyser)
- A geyser is the result of underground water under the combined conditions of high temperatures and increased pressure beneath the surface of the earth.
- Because of the pressure created from the heat underground, the water shoots out of the surface in the form of steam and hot water.
- In order to function, a geyser must have a source of heat, a reservoir where water can be stored until the temperature rises to an unstable point, an opening through which the hot water and steam can escape, and underground channels for resupplying water after an eruption.
- Favorable conditions for geyser exist in some regions of the world including New Zealand, Iceland, and the Yellowstone National Park area of the United States.
- The most famous geyser in the world is Old Faithfull in Yellow Park. Old Faithfull erupts almost every hour, rising to a height of 125 to 170 feet and expelling more than ten thousand gallons during each eruption.
Khalisa Faiza Yusuf - XI MIPA 4
BalasHapusHurricane
• It's a storm system which consists of a low pressure centre and thunderstorms which features strong winds and heavy rain.
• A tropical depression has a defined surface circulation with organised thunderstorm activity
• Maximum sustained winds are less than 17m/s (33kt, 38mph, or 62km/h).
• Storm tends to develop an 'eye' which is an area of relative calm in the centre of circulation
• Hurricanes need heat and moisture in order to be sustained.
• This causes the overlying atmosphere to be unstable enough to sustain convection and thunderstorms.
• Tropical cyclones can form in any of the worlds oceans.
• They generally occur in the tropics but can also occur in the mid-latitudes.
• The majority of tropical cyclones form between 10 and 30 degrees from the equator.
• A tropical cyclone needs a pre-existing system of disturbed weather. There must be some kind of circulation and low pressure centre.
Zhafira Islamatasya - XI MIPA 4
BalasHapusInsomnia
1. Insomnia is a sleep disorder in which you have trouble falling and/or staying asleep.
2. The condition can be short-term (acute) or can last a long time (chronic). It may also come and go.
3. Acute insomnia lasts from 1 night to a few weeks. Insomnia is chronic when it happens at least 3 nights a week for 3 months or more.
4. There are two types of insomnia: primary and secondary.
- Primary insomnia : This means your sleep problems aren’t linked to any other health condition or problem.
- Secondary insomnia : This means you have trouble sleeping because of a health condition (like asthma, depression, arthritis, cancer, or heartburn); pain; medication; or substance use (like alcohol).
5. Causes of primary insomnia include:
- Stress related to big life events, like a job loss or change, the death of a loved one, divorce, or moving.
- Things around you like noise, light, or temperature.
- Changes to your sleep schedule like jet lag.
6. Causes of secondary insomnia include:
- Mental health issues like depression and anxiety
- Medications for colds, allergies, depression, high blood pressure, and asthma.
- Caffeine, tobacco, or alcohol use.
Ayesha Zia Qudsia- XI MIPA 4
BalasHapusDigestive System
-Saliva contains digestive juice which moistens the food, so it can be swallowed easily
-The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth
-In a few hours, the food changes into acids
-These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream
-From the mouth, food passes through the esophagus (the food passage) into the stomach.
-in the stomach, the food is mixed with the juices secreted by the cells in the stomach for several hours
-All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards
Ahmad Fathi Rafif I- XI MIPA 4
BalasHapusFloods
-No region is safe from flooding. All 50 states are subject to flash floods.
-Flash floods can bring walls of water from 10 to 20 feet high.
-A car can be taken away in as little as 2 feet of water.
-To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.
-Flooding is caused by spring thawing (snow and frozen grounds melting in the spring), heavy rains, snow melt runoffs, flash floods, and mudflows.
-In preparation for a flood, it is important to stock up on first aid items, non-perishable foods, 3 gallons of water per person for 3 days, battery operated radio for weather reports, extra batteries, personal hygiene necessities.
-To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.
Mohamad Naufal - XI MIPA 4
BalasHapus"Rainbows"
- Rainbows are a meteorological phenomenon caused by reflection, refraction and dispersion of light in water droplets
- Rainbows aren't located at a distance from the observer, but they come from optical illusion caused by any water droplets viewed from a certain angle relative to a light source.
- Rainbows can also be caused by other kinds of airborne waters other than rain such as mist, spray, and etc.
- Rainbows are usually seen in western sky during the morning and in the eastern sky in the early evening.
- A full circle rainbow is possible to be seen from an airplane.
- Newton originally divided the rainbow spectrum into 5 colors, which was red, orange, yellow, green, blue, and violet. he later added orange and indigo.
- There are several variations of rainbows such as, double rainbows, twinned rainbows, full circle rainbows, supernumerary rainbows, reflected rainbow, and etc.
- Aristotle was first to seriously study rainbows, after his death, much rainbow theories contains reactions to his work.
Muhammad Fadhil Oktafianto - XI MIPA 4
BalasHapusGlobal Warming
-Global warming has a very big impact in natural conditions,humans and animals
-The Global warming process starts when sunlight shines the earth where most of the heat is absorbed by the earth and a half of it is reflected back onto the air (atmosphere)
-Sunshine returning to the air is trapped by gases in the atmosphere such as carbon dioxide, sulfur dioxide, methane, water vapor, and so on. This event is known as the greenhouse effect.
-Solar radiation on the earth's atmosphere makes ozone layer get thinner and makes the sunlight which shines the Earth become hotter
-he greenhouse effect also causes the sunlight which is reflected back onto space is reflected back into the earth. This phenomenon causes the earth continuously getting hotter. This condition is known as global warming.
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BalasHapusAleisya Asty Trisnalia - XI MIPA 4
BalasHapusLandslide
1. Landslide is a geological process that happen because of the movement of rock mass or soil such as the fall of rocks or clumps of soil which detached from the main section of the mountain or hill.
2. Landslide usually happen in the mountainous areas.
3. High rainfall during the rainy season will also caused landslide.
4. Landslide often caused a lot of disadvantages.
5. To prevent landslide to happen, start to care about our environtment. We can start by planting tree, do reforestation, and don't throw trash carelessly
Jessica Reitanya - XI IPA 4
BalasHapusAsteroids
- An asteroid is a space rock that revolves around a solar system or the force of gravity (in our solar system is the Sun). They can be as large as a dwarf planet, and the smallest one ever studied is about 2 meters wide.
- The first and largest asteroid was discovered by an Italian priest and astronomer Giuseppe Piazzi in 1801 (Ceres, which will later be classified as a dwarf planet).
-The current known asteroid count is 957,493.
- Asteroids are formed because of collision, causing small rocky objects to bump into each other.
- Nearly all asteroids are irregular-shaped and covered in dust.
- Our solar system has two asteroid belts, the main one is called The Kuiper Belt, that's located just outside of Neptune's orbit. The other one is located between Mars and Jupiter.
- When a group of asteroids are being attracted by a planet's gravity, they would most likely to collide and form a new moon (ex. Phobos and Deimos, Mars' moons).
- Asteroids have three classifications in terms of appearance and what they're made of: C-Type (carbonaceous asteroids, gray), S-type (siliceous asteroids, green), and M-Type (metallic asteroids, red).
- An asteroid (or a part of it) that crashes into Earth is called a meteorite.
- According to NASA, dangerous meteorites are extremely rare to hit Earth, because most of it's surface would most likely to burn in our atmosphere.
- Scientists believe that frequent asteroid/meteorite collisions may have a huge impact during the Earth's formation, because they may have delivered ice and carbon-based molecules that made the planet contain water.
Michael - XI MIPA 4
BalasHapusDrought
1. A drought or drouth is an event of prolonged shortages in the water supply, whether atmospheric (below-average precipitation), surface water or ground water.
2. scientists grouped the definitions into four basic categories: meteorological, hydrological, agricultural and socioeconomic.
3. A decrease in precipitation compared to the historical average for that area would qualify as a meteorological drought.
4. Agricultural drought accounts for the water needs of crops during different growing stages.
5. Hydrological drought refers to persistently low water volumes in streams, rivers and reservoirs.
6. Socioeconomic drought occurs when the demand for water exceeds the supply.
7. Droughts are caused by precipitation deficiency, dry season, climate changes, erosion, and human activities.
8. Common consequences of drought includes : diminished crop and livestock growth, animal migration, hunger ,wildfires, famine, etc
Puteri Maharani - XI MIPA 4
BalasHapus(Solar Eclipse)
- The Moon orbits the Earth once a month, and eclipses happen if it lines up exactly with the Earth and the Sun. Solar eclipses occur at New Moon, when the Moon is between Earth and the Sun. Lunar eclipses occur at Full Moon, when Earth is between the Sun and the Moon.
- Eclipses do not take place every month because the orbits of the Moon and Earth are tilted at an angle. Most of the time, the line- up is not precise enough for an eclipse.
- There are at least two eclipses of the Sun each year, though most are partial.
- There are at least two eclipses of the Moon each year, but a proportion of these are only penumbral, when the Moon is not seen to darken by very much.
-There can be as many as seven eclipses (solar plus lunar) in any one year. ( Very Rare)
- On average, there is a total solar eclipse visible somewhere about every 18 months.
Finan Muzhaffar XI MIPA 4
BalasHapus(Snow)
- Snow begins from water vapor that gathered in the Earth’s atmosphere. A bunch of water vapor then cools to the point of condensation, then coagulates and form clouds.
- At the beginning of forming the clouds, its mass is smaller than the mass of the air, so the clouds float in the air. But, once the water vapor continue to gathered in the clouds, its mass also increases. So, at some point the air can no longer hold it mass. Then, the clouds broke and the water particles fall to the earth.
The water particles that fall is pure water. To make the pure water freeze, the particles of pure water need to contaminate with other particles (nucleator) in the air that will make the freezing process faster. Then, the pure water will turn into ice crystals.
- So, the water particles that gathered with other water particles will form bigger ice crystals. These ice crystals will then fall to earth as snow.
- Snow has a unique structure because there is no snow crystal that has the same shape, just like our fingerprint.
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BalasHapusFaiz Aditya K. - XI MIPA 4
BalasHapus(Volcano)
• Volcano happen when magma rises to the surface of the earth, which causes bubbles of gas to appear in it.This gas can cause pressure to build up in the mountain, and it eventually explodes
• When a volcanic eruption is about to occur, the earth will start to rumble, all the gases from the volcano will flow through the air and the volcano will start to smoke about an hour before the eruption.
• Eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides, avalanches, falling ash and floods.
• When lava erupts it can destroy, kill and melting anything surrounding or nearby islands.
• Why does lava take a long time to cool down?
Lava cools slowly because lava is a poor conductor of heat. Lava flows slow down and thicken as they harden.
• Volcano can trigger Tsunami, Earthquakes, floods, heatwave, and mudflows.
• During May 1883 in Indonesian, Krakatoa erupted. It produced one of the largest explosions ever recorded on earth.
Cherim Kim XI MIPA 4
BalasHapus( How do vicious volcano errupt? )
- A volcano is a large mountain of harden rock holding a massive amount of extremely hot lava.
- When lava flows occur they can reach a very high speed of 100 to 200km/hour, lava can be as hot as 1,170 degrees most likely melting everything when it erupts.
- An erruption occurs when the chamber fills with magma which therefore occurs it to press against the solid rock around it. Eventually magma gases and ash pushes through the vent leading it towards the crater, finally it will explode out on the surface because of the pressure.
- When the lava starts flowing out onto the surface melting everything, it will slowly get cold and turns into rock.
- Magma in the earth is lighter than the crust so it tries to push above it. They can trigger Tsunamis, Earthquakes, floods, rock falls and mudflows.
Farhlan Kiska Anargya Dindra
BalasHapusXI MIPA 4
(Tornado)
1. A tornado is as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 mph.
2. Damage paths of tornadoes can be in excess of one mile wide and 50 miles long.
3. Rotating thunderstorms are the best predictors of tornado activity.They are well defined thunderstorms on radar that may include hail, severe winds, lightning, or flash floods.
4. Tornadoes can occur when a warm front meets a cold front, forming a thunderstorm, which then can spawn 1 or more “twisters."
5. Most twisters or cyclones travel from southwest to northeast and can move in the opposite direction for short periods of time. A tornado can even backtrack if it is hit by winds from the eye of the thunderstorm.
6. Funnel clouds usually last less than 10 minutes before dissipating, and many only last several seconds. On rare occasion, cyclones can last for over an hour.
7. A tornado may appear nearly transparent until dust and debris are picked up or a cloud forms within the funnel.
8. Twisters strike predominantly along Tornado Alley — a flat stretch of land from western Texas to North Dakota. This region is a hotspot for tornadoes because the dry polar air from Canada meets the warm moist tropical air from the Gulf of Mexico.
9. Tornadoes are most likely to occur between 3 pm and 9 pm, but can occur at any time.
Darrell Nathaniel Pieter Gees Manua - XI MIPA 4
BalasHapusHail
- Hail is a form of precipitation consisting of solid ice that forms inside thunderstorm updrafts.
- Hailstones are formed when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere and freeze.
- Hail falls when it becomes heavy enough to overcome the strength of the thunderstorm updraft and is pulled toward the earth by gravity.
- Hail can damage aircraft, homes and cars, and can be deadly to livestock and people.
- Hailstones can have layers of clear and cloudy ice if the hailstone encounters different temperature and liquid water content conditions in the thunderstorm.
- The fall speed of hail primarily depends on the size of the hailstone, the friction between the hailstone and surrounding air, the local wind conditions (both horizontal and vertical), and the degree of melting of the hailstone.
Prita Nisrina XI MIPA 4
BalasHapus(Lunar eclipses)
-Lunar eclipses occur when earth's shadow blocks the sun's light,which otherwise reflects off the moon.
-There are three types lunar eclipse total,partial,and penumbral.lunar eclipse with the most dramatic being a total lunar eclipse.
-A lunar eclipse can occur only at full moon,total lunar eclipse can happen only when the sun,earth and moon are perfectly lined up.
-The next total lunar eclipse,or "blood moon" won't occur until May 26,2021,and it will be visible from eastern Asia,Australia,The pacific oceand and much of the Americas.
-The moon may turn red or coppery colored during the total portion of an eclipse.it is possible because while the moon is in total shadow,some light from the sun passes through Earth's atmosphere and is bent toward the moon.
-The exact color that the moon appears depends on the amount of dust and clouds in the atmosphere.
-If there are extra particles in the atmosphere,from say a recent volcanic eruption,the moon will appear a darker shade or red.
Zahir Irsyad F. - XI MIPA 4
BalasHapusGlobal Warming
- Global warming is a phenomenon used to describe the gradual increase in the temperature of Earth's atmosphere and oceans.
- All object emit radiation because of their temperature.
- Some gases in the atmoshpehre are called “greenhouse gases”. These are gases, like water vapor and carbon dioxide, that are transparent to visible light, but absorb infrared light.
- When visible light from the Sun hits the earth, it passes through the atmosphere, hits the earth, and warms the earth.
- The earth emits some of this energy back out into space, keeping the planet cool ,but the energy that the earth emits is in the infrared, and some of that is absorbed by the greenhouse gases in atmosphere instead of going back to into space.
- Failed crops, economic, slowdown, and deforestation are among the several impacts of global warming.
Ananta Rafi XI MIPA 4
BalasHapus( How does freezing rain form? )
- Freezing rain starts as snow. It then falls through a warmer part of the atmosphere and melts.
- The melted snow falls through cold conditions and "supercools", becoming almost as cold as ice ( but still in a form of a liquid ) and is just above freezing.
-As this supercooled water hits the ground, it spreads out and freezes on contact, forming a perfectly smooth, transparent layer of ice. This creates a slippery glaze over most surfaces, which makes driving or walking almost impossible.
- It becomes dangerous because you just think it's rain and you go out on the road and the whole road is ice.
- In the US, a freezing rain storm is known as an ice storm.
Arrasya Aninggadhira XI MIPA 4
BalasHapus(Lightning)
1. Lightning is the process of releasing static electricity. It occurred as a result of the discharge of electric charges of the cloud.
2. Lightning occurs due to a potential difference in charge between the cloud and the earth, or cloud to another cloud.
3. The charge on the cloud occurs because the clouds move continuously on a regular basis. During the movement of the cloud will interact with other cloud so that the negative charge will be gathered.
4. The combination of impact and freezing causes the difference in charge were very large, and resulted in a lightning strike.
5. Lightning is more common in the rainy season.
6. The effect of direct attack of lightning is evident, ranging from damage to buildings, fire, until the danger of death to humans.
Muhammad Maulana J. XI MIPA 4
BalasHapus(Earthquake)
- Earthquake is the vibration on the surface of earth, which is the result of a sudden
release of energy in earth crust that creates seismic effect.
- The rocks of the earth crush along the plate boundaries slowly deform due to the
relative motion of the different plates
- This process keeps on until the resistence of the rocks finally breaks and release
the energy stored that is transmitted by seismic waves.
- Earthquakes occur along faults that divide two blocks of rocks that slide each other
during the seismic event.
- The magnitude of the earthquake is proportional of the fault size and the entity of
the movement of two blocks.
- The earthquake induce permanent deformation of the ground surface.
Andrea Aisyah Magnolia
BalasHapusXI MIPA 4
Aurora
1. An Aurora, sometimes referred to as polar lights, northern lights, is a natural light display in the Earth’s sky, predominantly seen in the high-latitude regions.
2. The word “aurora” is derived from the name of the Roman goddes of dawn, Aurora, who travelled from east to west announcing the coming of the sun.
4. Aurora is the result of disturbances in the magnetosphere caused by solar wind.
5. The resulting ionization and excitation of atmospheric constituents emit light of varying color and complexity.
4. According to Clark (2007), there are four main forms of aurora that can be seen from the ground, from least to most visible :
- A mild glow, near the horizon.
- Patches or surfaces that look like clouds.
- Arcs curve across the sky.
- Rays are light and dark stripes across arcs, reaching upwards by various amounts.
- Coronas cover much of the sky and diverge from one point on it.
Muhammad Zaki XI MIPA 4
BalasHapus( The process of occurence of lightning)
- there are clouds of negatively charged and positively.
- Process of the occurrence happens within the cloud, when clouds move regularly, and touches other clouds, which resulted in the gathering of negative charge on one side, and the positive charge gathered on the other.
- When a potential difference between the clouds and the Earth’s are significant, it will result in the occurrence of disposal of negative charge called the electron.
- In this process, the air is the media that will pass electrons. If at the time the charge of electrons can penetrate the air isolation boundaries, this will make the sound of explosions or thunder.
- Occurrence of Lightning is more common in the rainy season because at that time, the air contains more moisture, resulting in the power of air isolation boundaries went down and the insulation can flow more easily.
Thirza Baihaqi XI MIPA 4
BalasHapus( Tornado )
- Tornado is a fast rotating column of air that forms the relationship between a cumulonimbus cloud or in the rare event of a cumulus cloud base to the ground.
- Tornadoes come in many sizes but are typically in the form a visible condensation funnel, with the narrow end touching the earth.
- Most tornadoes have wind speeds of 177 km / h or more with the average reach of 75 m and employ several kilometers before dissipating. Several tornadoes that reached wind speeds of 300-480 km / h stretch more than a mile (1.6 km) and can survive on surfaces with more than 100 km.
- Tornadoes are most common in the Unted States
- Tornadoes are formed if a layer of cold air is above a layer of hot air, then, hot air rises at a speed of around 300 km / h, air infiltrating from the side which causes the swirling wind to form a tornado.
Haifa Syakilah XI MIPA 2
BalasHapus(AURORA)
-Natural Lighy Display in the Earth's sky.
-You can see it in the high latitude regions, such as Arctics and antartics
-Word Aurora is derved from the name of roman goddess of dawn, Aurora.
-Auroras are the result of disturbances in the magnetosphere caused by solar wind.
-Most auroras occur in a band known as the auroral zone, at all local times, most clearly seen at nights againts a dark sky.
-Forms of Aurora : A mild glow, patches, arcs curve, rays, coronas.
-colors : red, green, blue, ultraviolet, infraded, yellow and pink
Zaviera R. F. - XI MIPA 2
BalasHapusThunder
• Thunder is the sound caused by lightning.
• Lightning caused by clouds of negatively charged and positively. If at the time of the charge of electrons can penetrate the air isolation boundaries this is making the sound of explosions or thunder.
• Lightning is more common in the rainy season because during the rainy season, the air contains more high water content, which causes the air insulation power down and currents easier to pass through.
• Thunder's sound depends on the distance from and nature of the lightning, it can range from a sharp, loud crack to a long, low rumble
• Thunder can rupture the eardrums of people nearby, leading to permanently impaired hearing.
• The study of thunder is known as brontology.
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BalasHapusThufaila Dea Fadhila (XI MIPA 3)
BalasHapusSnow
- The process of the formation of snow. Starting from water vapor that gather in Earth’s atmosphere, the water vapor cools to the point of condensation, then rotate to form clouds. There are certain particles that function accelerates the freezing phase, so thatpure water is rapidly becoming the ice crystals.
- Snow Crystal has a unique structure, no snow crystals that have the same shape in this world
- the Crystal structure of the snow allows snow toreflect all the colors to all directions in the same amount, then came the white color.