Is glass a conductor or insulator?

Is metal a conductor or insulator?

What does a circuit need to be able to work?

What kind of circuit is used to light more than one bulb at the same time? If one bulb burns out the others will still work.

What allows heat to pass through them easily?

What doe not allow heat to pass through them quickly?

What is the ability to do work?

What form of energy allows us to see objects?

What is motion energy?