Across
- 3. wright Brothers invented
- 9. who was born on 15th September? This day is celebrated as Engineers Day in India.
- 10. william Cullen made the first
- 11. who is the famous scientist who discovered gravity
Down
- 1. who is the famous scientist from Sweden, known as the inventor of dynamite.
- 2. which planet is known as the Red Planet?
- 4. longest bone in human body is?
- 5. who is considered as the father of the Indian Space Program
- 6. which is the most common element found in our universe
- 7. which is the second most abundant element found on earth’s crust.
- 8. what is used in balloons as it is lighter than air