Which is an effective way scientists study ancient climates?

a, read very old books

b. review old maps

c. drill deep into glaciers

d. study other planets

Which of the following is not an effect of land substance

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution