Heat water using the sun during the day, and use it during the cold night.
Use a solar panel to charge batteries during the day, and use the power at night.
Answer:
for 16 it is heart.
Explanation:
for 17 it is kidney to bladder
A dependent variable is how they are recording, measuring or keeping track of the science experiment their doing.
A independent variable is the things/types there using to compare what is the most/least affective in the experiment.
A controlled variable is something that stays the same in the experiment or a group/set used for comparison
Explanation:
Ocean ridges features form along all types of plate boundaries.