Convection currents are caused by the colliding of cold and warm air. At night, air above water is warm and air above land is cold. The opposite is true in daytime. When the warm air hits the cold air, which is more dense, it is pushed upward. Then it travels laterally until it cools. It comes back down and pushes up the former cold air, which is now warm. This repeats many times.
Answer:
when the size of a star increases, luminosity of star also increases.
The color of a star is decided by the surface temperature of the star and the temperature of a star depends on the size of star.
The smaller stars have low temperature and they are usually red (Proxima Centauri - red dwarf star).
The massive stars have higher temperature and they are usually blue (for exaple Zeta Puppis - Blue supergiant star).
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Explanation:
Answer:
oid the sun. If you want to remove pimple marks faster, then try and avoid the sun as much as you can. ...
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It will result in less oxygen released into the atmosphere, erosion, animal extinction.
<span>Through the process of photosynthesis, trees
absorb carbon dioxide from the atmosphere and release oxygen into the
atmosphere. If the
number of trees decreases as the consequence of clear-cutting a rainforest, less oxygen
released into the atmosphere and more co2 buildup.</span>
<span>Further, tree roots hold the earth in place, so with less trees, erosion
could occur without the tree roots to hold the earth in place.</span>
<span>Nevertheless, trees represent habitat for many animals, therefore <span>if the
number of trees are cleared-out, loss of
habitat of many animals will occur and diversity could decrease.</span></span>
Answer:
Sunspots are areas where the magnetic field is about 2,500 times stronger than Earth’s, much higher than anywhere else on the Sun. … This in turn lowers the temperature relative to it’s surroundings because the concentrated magn fields inhibits the flow of hot, new gas from the Sun’s interior to the surface.