In the lab, if we use less ice and try the experiment again to see if that changes the time it takes to condense, that would be an example of a Question 4 options:
A control
B variable
C hypothesis

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays