Which statement is most accurate? A. Weathering occurs only after erosion.

B . Erosion occurs after weathering.

C. Either weathering or erosion may occur first.

D . Weathering and erosion occur simultaneously (at the same time).

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

Why are current extinctions of concern to enviromentalists?