1. Sir Alexander Fleming (1881- 1955) is best remembered for..

2. Gunpowder was invented by

3. What famous scientist was awarded the 1921 Nobel Prize in Physics for his work on theoretical physics?

4. What did Ernest Rutherford discover in 1919?

5. Coal, diamond and graphite all have what element in common?

6. What is the lowest level in the Earth's atmosphere?

7. Botany is the study of what?

8. What is one-half cubed?

9. Which of the gases below would not be found in the Earth's atmosphere?

10. An alloy of Copper and tin is called