What is a characteristic of all terrestrial planets?
a. They all have water.
b. They all have a rocky surface.
c. They all have a thick atmosphere.
d. They all have weather patterns.
e. They all have a very geologically active surface.
Question 2
Observing star clusters will give astronomers needed data for stellar evolution because all the stars are the same age.
a. True
b. False
Indicate whether the statement is true or false