Across
- 3. How many colours are there in white light?
- 5. Longest Bone in human body?
- 7. Used in Ballons as it is lighter than air?
- 9. Which Planet is known as Red Planet?
- 10. Wright Brothers invented?
Down
- 1. What is the unit of measurement of energy?
- 2. An object which revolves around the planet?
- 4. It is also known as Blue Planet?
- 6. Solar system is in which galaxy?
- 8. Baby frog is known as?