Space Challenge Practice
| # | Answer |
|---|---|
| 1 | Space is the large area beyond Earth where planets, stars, and other objects are found. |
| 2 | The Sun is a star. |
| 3 | Answers may vary, such as Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, or Neptune. |
| 4 | Humans need oxygen to breathe. |
| 5 | Astronauts need spacesuits because space has no air to breathe and very little protection from extreme temperatures. |
| 6 | No, there is almost no air in outer space. |
| 7 | Gravity pulls objects toward Earth. |
| 8 | Objects float because the spacecraft and everything inside it are in microgravity or free fall. |
| 9 | The candle flame would go out because oxygen is needed for burning. |
| 10 | Water boils differently in space because the pressure is very low, so liquids can change more easily. |
| 11 | Plasma is the most common state of matter in stars like the Sun. |
| 12 | A gas spreads out because its particles move freely and fill all available space. |
| 13 | It can be both depending on the object, but many places in space are extremely cold. |
| 14 | Rocket fuel is important because it provides the energy needed to launch a rocket and move it through space. |
| 15 | One chemistry reason is that Earth’s atmosphere provides gases like oxygen for breathing and protects living things from harsh conditions. |