my top ten science topics

1. What would it take to make a camera?
2. What mamals are unlike any other?
3. Which kind of car is really better gas or electric?
4. What is in coal that is a good electricity conductor?
5. How much electricity does a train need to move.
6. How do we get airplanes, jets, and helicopters to stay in the air?
7. How do we recycle paper and plastic?
8. What can make hair grow at a faster rate?
9. How do fish eggs look going through the growth topics?
10. What makes trees live for so long?