Rock layers form when settlements build up over time they usually have to go through pressure and compaction/cementation before this happens
Answer:Ancient Greeks had a lot of time on their hands when they were not involved in wars. They had to time to think about and observe the universe and everything surrounding them. As such, ancient Greek scientists made significant discoveries in numerous fields such as geometry, astronomy, mathematics and medicine.
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Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy, and rainfall is scant. Tundra lands are covered with snow for much of the year, but summer brings bursts of wildflowers.
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<em>When it reaches the Earth, some is reflected back to space by clouds, some is absorbed by the atmosphere, and some is absorbed at the </em><u><em>Earth's surface.</em></u><em> However, since the Earth is much cooler than the Sun, its radiating energy is much weaker infrared energy.</em>
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