Class 4 Crossword Puzzle
Across
- 4. the gaseous state of water.
- 7. the outer layer of gas that surrounds Earth.
- 8. a chemical reaction that releases a lot of light and heat.
- 9. what is common between a bird, a bat and a butterfly?
- 10. the cutting of trees by humans.
Down
- 1. the process by which plants make their food.
- 2. the organs that enable us to see.
- 3. the organs that are used for breathing.
- 5. hot molten rock that is located under the Earth's surface.
- 6. animals which eat other animals.