Explain why earth and other planets were not solid when they formed during the beginning of the precambrian, approximately 4,600 million years ago (mya). what was this particular time period called, and why is this time period not really considered a part of earth’s geological history?

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

Aphase diagram assumes is kept constant.