Space Practice Worksheet
| # | Answer |
|---|---|
| 1 | Space is the vast area beyond Earth’s atmosphere that contains stars, planets, moons, and other objects. |
| 2 | Outer space. |
| 3 | A mouse, plant, human, bacteria, or another correct example. |
| 4 | Space has little or no air, very low pressure, and different gravity than Earth. |
| 5 | Oxygen. |
| 6 | Humans need oxygen for breathing and for the cells in the body to make energy. |
| 7 | They can become weaker and smaller. |
| 8 | By exercising regularly. |
| 9 | Exercise helps astronauts keep their muscles and bones strong in low gravity. |
| 10 | Microgravity is a condition in which objects feel much less gravity than they do on Earth. |
| 11 | Plants may grow differently because of changes in gravity, light, and water movement. |
| 12 | They study plants to learn how living things grow in space and to support future space travel. |
| 13 | Space radiation can damage DNA and cells. |
| 14 | They need protection from vacuum, radiation, extreme temperatures, and the lack of breathable air. |
| 15 | Long-term life on Mars would be difficult because humans would need air, water, food, and protection from radiation and low gravity. |