Fill in each blank with the correct word from the lesson.

1. Astronauts exercise two hours daily _______'s resistance.
2. Astronauts on the International _______ Station float around inside — they don't walk, they drift.
3. Weightlessness doesn't mean there's no _______.
4. Life in Space is an important topic in _______.
5. We can learn about _______ from this lesson.

Choose the best option for each question.

1. Why do astronauts float in the ISS?
   a) There is no gravity in spaceb) The ISS has no airc) The station and astronaut are both in freefall at the same rated) They wear special anti-gravity suits
2. Why do astronauts need to exercise 2 hours every day in space?
   a) To stay entertainedb) To prevent muscle and bone loss from lack of gravityc) Because space food needs digestingd) To maintain the station's power
3. What happens to water droplets in the ISS?
   a) They fall to the floorb) They evaporate immediatelyc) They form floating spherical ballsd) They freeze

Write T for True or F for False in the brackets.

1. The station and astronaut are both in freefall at the same rate is one of the key concepts in the lesson on Life in Space.
2. There is no gravity in space is the main topic of this lesson.
3. Astronauts exercise two hours daily to prevent muscle and bone loss from lack of gravity's resistance.
4. Astronauts exercise two hours daily To stay entertained's resistance.

1. In your own words, explain what Life in Space means.
2. List two things you learned from this lesson on Life in Space.