2. The basic unit of life is the (a)   .

3. Water boils at (a)   degrees Celsius at standard atmospheric pressure.

4. The Earth revolves around the (a)   .

5. The chemical symbol for water is (a)   .

6. Isaac Newton is famous for his laws of (a)   .

7. The largest planet in our solar system is (a)   .

8. The primary gas that makes up Earth's atmosphere is (a)   .

9. A triangle with all three sides equal in length is called an (a)   triangle.

10. The capital city of the Philippines is (a)   .

11. The currency used in the United States is the (a)   .

12. The first human to walk on the moon was (a)   Armstrong.

13. The study of living organisms is called (a)   .

14. The force that pulls objects towards each other is called (a)   .

15. The process of breaking down food into smaller molecules for absorption is called (a)   .