Geologists have divided Earth's history into time units, which are largely based on

a. climates.

b. magnetism in rocks.

c. evidence of erosion.

d. fossils

Which statement is incorrect? Cavity masonry walls are beneficial because: A: They allow water to drain easily. B: Their two wythes of brick masonry provide added insulation. C: They provide a durable façade.

Why are large-scale chemical attacks difficult to accomplish?

Which of the following statements best identifies how the growth of the city of Los Angeles affected the Owens River Valley? A.

How does a sinkhole form?

Most graphs do not begin at a base level of zero. True False

Based on studies of planetary systems around other stars, which of the following statements are currently believed to be true about how common or rare it is for stars to have planets in orbit around them?

The less mass in a given volume of air, the a. more the air weighs. b. greater the air pressure. c. more dense the air. d. less dense the air.

Which is the most destructive kind of mass movement

What immediately happens to rainwater when it falls to earth? What eventually happens to it?

People who disagree with the government are arrested. Limited or Unlimited Government?