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