Hello, I need help on the blank ones. This is for anatomy and physiology this is for my test tomorrow and it will help a lot if someone helped me with it. Please and thank you :)

Why is it important to study each branch of earth science?

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.