What caused Earth to develop layers as it cooled? A. escape of gases
purces
B. its speed of rotation
C, its magnetic field
Earth
D. differences in density

What is the name of the ocean current that affects the british isles? how does it influence their climate?

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.

Read the article titled "castro resigns." why did the us impose trade sanctions against cuba in 1962?