Rockets and Astronauts

How do rockets fly to space and how do astronauts train?

An engaging look at the science of rocket propulsion and the rigorous training astronauts undergo to live and work in space.

Check your understanding

1. What is the name of the force that pushes a rocket upward when gas shoots out the bottom?
- A. Gravity
- B. Thrust
- C. Orbital velocity
- D. Vacuum
2. Why do rockets drop parts (stages) as they climb into space?
- A. To make the rocket look cool
- B. To scare off aliens
- C. To get rid of empty, heavy fuel tanks
- D. Because the rocket is too long
3. Where do astronauts practice for space missions because it feels like floating?
- A. A giant swimming pool
- B. A mountain top
- C. A dark basement
- D. A professional gym
4. What is the main reason why rockets carry their own supply of oxygen?
- A. To keep the astronauts alive
- B. To help the rocket float
- C. To burn fuel even where there is no air
- D. To keep the fuel cold

1. If there is still gravity in space, why do astronauts and objects appear to float?
- A. Gravity turns off in orbit
- B. They are falling around the Earth at the same speed
- C. Magnets hold them in the air
- D. The space station has no weight
2. Why are crumbs so dangerous for astronauts inside the International Space Station?
- A. They attract space bugs
- B. They make the station smell bad
- C. They could get stuck in machinery or eyes
- D. They are too expensive to clean up
3. How does a modern reusable rocket like those made by SpaceX land back on Earth?
- A. It uses a giant parachute
- B. It lands in the ocean and floats
- C. It uses wings to glide down
- D. It lands vertically using its engines
4. What is the purpose of a flight simulator for an astronaut?
- A. To play video games
- B. To learn how to handle emergencies in a safe environment
- C. To get used to the hot temperatures of space
- D. To practice eating special space food

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