Basic Knowledge

5. An animal that is known as the “king of the jungle.”
6. The basic unit that makes up all living things.
8. A shape with three sides.
9. A device used to tell time.
10. The longest river in the world is commonly taught as the __ River.
11. The force that pulls objects toward Earth.
14. The continent where Egypt is located.
18. The opposite of “hot.”
20. The center of an atom.
22. The process of changing from a caterpillar into a butterfly.
24. The planet famous for its rings.
26. The frozen form of water.
28. The change of water from liquid to gas.
30. The gas that humans need to breathe.
32. The instrument used to measure temperature.
35. The capital city of France.
36. The imaginary line that divides Earth into the Northern and Southern Hemispheres.
37. The layer of gases surrounding Earth.
38. The part of a plant that absorbs water and minerals from the soil.
41. The capital city of Japan.
42. A word that has the opposite meaning of another word.
43. The gas that plants take in during photosynthesis.
44. The organ that pumps blood around the body.
47. The process by which water changes from a liquid into a gas.
48. How many sides does a square have?
49. How many days are there in a week?
50. The change of a liquid into a solid.

1. The natural satellite of Earth.
2. The planet closest to the Sun.
3. Animals that have a backbone.
4. The opposite of “early.”
7. The largest mammal in the world.
12. The ocean between Africa, Asia, and Australia.
13. The organ responsible for controlling most activities of the human body.
15. The organ where food is mainly digested.
16. The largest planet in our solar system.
17. The star at the center of our solar system.
19. An animal that eats both plants and other animals.
21. The smallest particle of an element that retains its properties.
23. The largest continent in the world.
25. The planet we live on.
27. The scientist famous for the theory of relativity.
29. The instrument used to see very small objects.
31. The force that pulls objects toward the Earth.
33. The planet known as the Red Planet.
34. A polygon with eight sides.
35. A baby dog is called a __.
39. The hardest natural substance on Earth.
40. A scientist who studies living organisms.
45. The process by which plants make their food using sunlight.
46. The largest ocean on Earth.