Effects of Reduced Gravity and Atmosphere

If Earth were shrunk to half its size, its rotation would speed up, making a day last only 45 minutes. Gravity would weaken, causing objects to weigh half as much. This would make movement easier but slower. The atmosphere would thin, losing oxygen and CO2, requiring oxygen masks for outdoor activities. Weaker gravity would also lead to thinner bones and muscles in humans and animals, and trees would change shape. Overall, life on Earth would be drastically different.

What happens to Earth's rotation when its size is reduced to half?

• It slows down significantly.

• It remains the same.

• It stops completely.

• It speeds up, completing a day in 45 minutes.

How does reduced gravity affect the weight of objects on a half-sized Earth?

• Objects become half as heavy.

• Objects become twice as heavy.

• Objects become weightless.

• Objects weigh the same as before.

What is a consequence of a thinner atmosphere on a half-sized Earth?

• Increased atmospheric pressure.

• Stable atmospheric conditions.

• Increased oxygen levels.

• Decreased oxygen and CO2 levels.

Why would you need an oxygen mask for outdoor activities on a half-sized Earth?

• To filter out increased CO2.

• To protect against high winds.

• To avoid inhaling toxic gases.

• To compensate for reduced oxygen levels.

How would weaker gravity affect human and animal bones?

• Bones would become denser and stronger.

• Bones would remain unchanged.

• Bones would become thinner and weaker.

• Bones would grow larger.

What change would trees undergo due to lower gravity and a thinner atmosphere?

• Trees would grow underground.

• Trees would grow taller and thicker.

• Trees would become smaller and change shape.

• Trees would remain the same.