Question

3
imagine that fish fossils are found in the middle of the folded rock strata shown above (right). use this information to fill in the blanks to complete the sentence. not all answer choices will be used.
the presence of fish fossils suggests that this area was once covered by
. this must have occurred
the earthquake that caused the strata to fold.

desert
water
before
volcanoes
after

Explanation:

Fish fossils form in aquatic environments, so the area must have been covered by water first. For the folded strata with the fossil in the middle, the fossil formation (and the aquatic environment) had to happen before the earthquake that folded the strata, as folding would disturb the existing rock layers containing the fossil.

Answer:

1. water
2. before