Question 3 the pdo operates on a longer time scale than enso question 4

The formation of the planet uranus is estimated to have occurred approximately when?

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

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal