Across
- 3. The thin layer of air that surrounds the earth
- 5. Sun, stars, glow worms are which sources of light?
- 8. Strong stem of a big tree
- 9. This gas protects us from harmful sun rays
- 10. This is called the kitchen of a plant
Down
- 1. this animal is also called the ship of desert
- 2. This substance gives the green colour to leaves
- 4. Fastest growing woody plant
- 6. This is needed for burning and breathing
- 7. A portion of plant that grows above the ground