Over time in empty ground there grow plants: 1.lichens, 2.small bushes, 3.small trees, 4.pine trees and that area become forest.
Answer:
D.
Explanation:
Kepler First law – The Law of Orbits According to Kepler’s first law,” All the planets revolve around the sun in elliptical orbits having the sun at one of the foci”.
Answer: The question or problem is if beet root extract melts ice faster than salt. The scientists are trying to answer if the beet root extract would be ableto melt ice faster so that it could replace putting salt on the roads. Hope this helps :)
Heated air inside a ballon causes it to rise up in the sky because of helium,helium is the second Antony number that has the lowest mass maybe when the air cools the balloon it causes osmosis to make it change its mass.
Horizontal and vertical Speed are indirect towards each other and therefore the earth moves. This causes it to be in constant new positions, causing seasons.