1. Which star is the closest to planet Earth?
2. Of all measurements, which speed is considered the fastest?
3. What group of stars is the sun classified in?
4. Choose all the planets that are gas giants: (select all that apply)
5. Which scientist used one of the first telescopes to observe planets and stars?
6. What are animals called that only consume other animals?
7. Which planet is the largest planet in our solar system?
8. What is required for fire to burn?
9. How many bones does an adult human usually have?
10. Approximately how much time does light take to travel from Sun to Earth?
11. What is the most abundant gas in the Earth's atmosphere?
12. What type of animal is a shark?
14. What is the hardest natural substance on Earth?
15. What is the process called that converts a solid directly to a gas without passing through the liquid state?
