In a system, what is a stock? (Select the best answer.)

Question 4 options:


A pathway for information or materials


A feedback loop


A part of the system that can be measured as a quantity


A re-creation of a system designed to show how that system works



In the water cycle, which stage happens when water soaks into soil or rock? (Select the best answer.)

Question 5 options:


Precipitation


Runoff


Condensation


Infiltration