"Math and Science": HTML5 Crossword

Across

2. What is the missing number in 10 - ? = 6? (4)
4. What is the name of the 3D shape that looks like a party hat? (4)
6. What is the name of the 3D shape that looks like a soda can? (8)
9. How many coins are made of silver? (5)
10. Which coin is worth $0.05 cents? (6)
11. What does a scientist use to protect their eyes? (6,7)
13. When you subtract, the (blank) number comes first? (6)
16. Which 3D shape looks like a square? (4)
17. What is the answer called when you add? (5,0)
18. When you collect data (information), what tool can you use? (5)
19. This coin is made of copper. (5)

Down

1. This coin is worth $0.25 cents. (7)
3. What is another word for coins? (5)
5. What is the answer called when you subtract? (10)
7. Which coin is the smallest? (4)
8. Which 3D shape is round and looks like a ball? (6)
12. A Scientist uses this to protect their clothes? (3,4)
14. What does a scientist use to protect their hands? (6)
15. This form of energy helps the plants grow and allows us to see in the dark. (5)