What is used to measure ocean depth a. bottom dredges
b. nets
c. sonar
d. tidal patterns

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

The kind of wood most often used in contemporary furniture is

Which of the following characteristics define a state? check all that apply. a. a population of people b. a sovereign government that determines how a group of people is ruled c. an army, military, or police force d. a territory with set borders