Which statement best describes the fossil record? It is a complete record.
It is an incomplete record.
Most fossils are older than five billion years.
All fossils are younger than six hundred years.

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0