Astro_Unit_7_LivingSpace

AN ASTRONAUT IS...

• a narrow beam of light, heat, or energy

• a tube-shaped vehicle for travelling in space

• a country or area controlled by a more powerful country

• someone who travels into space

Why don’t astronauts’ muscles and bones stay strong while in space?

• They do not have enough food to eat.
• There is no weight to put pressure on their muscles and bones.
• They are not able to exercise in space.
• They do not have muscles in space.

What is the force present on Earth, but not in space, that makes it difficult  for the heart to move blood throughout the body?

• energy
• friction
• gravity
• inertia

Astronauts use special soap that _____.

• does not require a washcloth
• does not require water to rinse
• has strong chemicals
• does not have an odor

Why do astronauts eat tortillas instead of bread?

• Tortillas make great Frisbees.
• Tortillas do not crumble.
• Tex-Mex food tastes better.
• Bread takes up too much room in storage.

In space, how do astronauts sleep?

• They attach themselves to a wall or a chair.
• They float around the cabin.
• They sleep in a bed.
• They do not sleep while they are working in space.

The major purpose of the International Space Station is ______.

• to release and capture satellites
• to take photographs of objects in space
• to obtain information from astronauts who live in other countries
• to perform research that only the microgravity environment can provide

When astronauts use salt and pepper in space, why is it only in the liquid form?

• because the solid form can float around and get into instruments
• because the liquid form tastes better
• because the solid form will not stay on the food

5. What does the word orbit mean?

• 1. to revolve around

• 2. to imitate

• 3. to float

• 4. to restore

very weak gravity (= the force that makes things fall to the ground), especially in a spacecraft orbiting (= going around) the earth:

Scientists believe experiments done in ____ can find cures for disease.

• microfossil

• microgravity

• gravity