Why do astronauts need to wear pressurized suits in space?
a. because air pressure is so great in space they could be crushed without the suits.
b. because without the pressure in the suits the astronauts could freeze to death.
c. because space is a vacuum, the astronauts' bodies could explode without the suits.
d. the pressure protects them from solar radiation.

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.