You look for shells when you visit the beach. However, if you're hiking in the mountains and you find shells by accident, you know that
A) the mountain has a lake nearby.
B) the mountain was once under the sea.
C) some prehistoric sea creatures could live on land, too.
D) the shells were blown by powerful winds to the mountain top.

Which material burns faster? metal aluminum

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing