Read the following statements and select T if you think it is true, F for false. After you complete the module, revisit your answers and correct your mistakes.

 

​ True False   1. It takes about 260 days to travel to Mars.

​ True False   2. It would take a jet airliner 1 million years to fly to the nearest star in the night sky.

​ True False   3. NASA uses ion propulsion for some deep space missions.

​ True False    4. You have a gravitational pull on the Earth and other objects.

​ True False   5. On the moon, falling objects accelerate at only 3.8 m/s2.

​ True False   6. If you move twice as far from the Earth, the pull of gravity is cut in half.

​ True False   7. The Navy built a gun that could shoot things 180 km high.

​ True False   8. A rocket must travel extremely fast straight up to go into earth orbit.

​ True False   9. What goes up must come down.

​ True False   10. You would have to go over 1 million km/s to escape from the surface of a neutron star.