Here are the answers to your questions:
Question 1
Batteries are a source of __________ energy.
Response: A chemical
Question 2
When pressing the accelerator on a car, the ___________ energy of the fuel is transformed into the _____________ energy that makes the car move.
Response: B chemical; mechanical
Question 3
Lighting a match takes the chemical potential energy and transforms it into _____________ energy and radiation.
Response: A thermal