7. The picture shows smooth, continuous lines eroded along
the ground. This was the
result of:
A. Glaciers
B. Rain
C. Wind
D. Volcanic activity

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species

Which of the following involves only abiotic factors? a. a large rock being weathered by wind and rain b. an otter using a stone to break open a sea urchin c. a spider building a web in the corner of a building d. a pine tree absorbing light from the sun