ASHLEY Science Part 2 floating sinking

What causes astronauts to feel weightless in the International Space Station (ISS)?

• • A. The astronauts inside the ISS float due to the absence of gravity in space.

• • B. The ISS moves around the Earth at a speed equal to its fall caused by gravity.

• • C. Astronauts float because they are too far away for Earth's gravity to affect them.

• • D. Weightlessness happens because astronauts stop exercising their muscles daily.

Why might astronauts feel confused about where their arms and legs are in space?

• • A. Weightlessness disrupts their body's normal sense of up and down.

• • B. Astronauts cannot see their body parts clearly in low light conditions.

• • C. Astronauts frequently move too quickly and lose track of their limbs.

• • D. Weightlessness prevents astronauts from effectively sleeping at night.

According to the text, why isn't floating in space actually relaxing for astronauts?

• • A. Astronauts worry too much about their tasks to relax while floating.

• • B. Floating in space causes the body to weaken and confuses orientation.

• • C. Astronauts constantly move around and rarely have time to rest or sleep.

• • D. The space station environment is noisy and astronauts rarely feel relaxed.

What is the best description of the forward motion of the International Space Station?

• • A. It moves slowly, ensuring that astronauts can perform experiments carefully.

• • B. It moves faster than Earth's gravity can pull, thus drifting away from Earth.

• • C. It moves at just the right speed to balance Earth's gravitational pull downward.

• • D. It remains stationary, allowing the astronauts to float freely inside it.

Why do astronauts need extra handholds and footholds on the outside of spacecraft?

• • A. To help astronauts avoid slipping when surfaces get wet during repairs.

• • B. To make sure astronauts can rest comfortably when they become tired.

• • C. To ensure astronauts do not float away during spacewalks outside the craft.

• • D. To allow astronauts to safely store their equipment outside the spacecraft.

What happens to astronauts' bones when they stay in space for weeks or months?

• • A. Their bones become stronger due to regular physical exercise in space.

• • B. Their bones lose calcium and become weaker, increasing injury risks.

• • C. Their bones remain the same because bones don't change in weightlessness.

• • D. Their bones become heavier due to increased exercise in microgravity.

Why do astronauts have a higher risk of breaking bones during space missions?

• • A. Because astronauts perform difficult tasks that require climbing outside.

• • B. Because they float too fast and frequently collide with spacecraft walls.

• • C. Because bones weaken due to calcium loss, making them easier to break.

• • D. Because astronauts typically fall inside spacecraft due to microgravity.

How often must astronauts exercise daily to minimize muscle weakness in space?

• • A. They must exercise one hour every day to maintain their muscle health.

• • B. They must exercise for two hours daily to overcome muscle weakening.

• • C. They must exercise three times each day to prevent muscle deterioration.

• • D. They must exercise at least four hours daily to build stronger muscles.

Why is exercising difficult for astronauts inside the spacecraft?

• • A. Because astronauts have too many daily tasks, leaving little time for it.

• • B. Because exercising equipment frequently breaks down due to zero gravity.

• • C. Because astronauts prefer floating and avoid unnecessary physical effort.

• • D. Because the limited space inside the spacecraft makes it challenging.

After returning from a six-month space mission, astronauts usually need:

• • A. Several days of rehabilitation to adapt quickly back to Earth's gravity.

• • B. Several months of rehabilitation to rebuild muscles and bones on Earth.

• • C. Several hours of exercise immediately upon returning to Earth's surface.

• • D. Several weeks of total rest to allow their muscles to naturally recover.