OD4 Unit 1 Get ready

1. The Earth and other planets orbit the __________.

• spacecraft
• asteroid
• solar system
• galaxy

2. A __________ is a small rocky body that sometimes enters Earth’s atmosphere.

• comet
• meteorite
• moon
• star

3. Halley’s __________ appears every 76 years.

• comet
• asteroid
• telescope
• observatory

4. The __________ reflects light from the Sun at night.

• moon
• galaxy
• meteorite
• spacecraft

5. A __________ is a rocky body orbiting the Sun, smaller than a planet.

• comet
• asteroid
• star
• universe

6. Astronomers use a __________ to see distant stars.

• telescope
• spacecraft
• meteorite
• observatory

7. A __________ studies the sky and provides data to astronomers.

• observatory
• galaxy
• moon
• comet

8. The Milky Way is our home __________.

• spacecraft
• solar system
• galaxy
• asteroid

9. A __________ is a giant ball of gas that produces light and heat.

• star
• comet
• meteorite
• moon

10. The __________ contains all matter and energy that exists.

• universe
• asteroid
• solar system
• galaxy