P6 Energy

What is energy?

• Energy is a push or a pull.

• Energy is the ability to do work.

• Energy is a force.

These fossil fuels have

• gravitational potential energy

• chemical potential energy

• electrical energy

• elastic potential energy

Batteries have _____________________.

• electrical energy

• chemical potential energy

• heat energy

• gravitational potential energy

The (a) _________ in the battery is converted to (b) __________ in the circuit to light up the bulb.

• (a) chemical potential energy (b) electrical energy

• (a) electrical energy (b) chemical potential energy

• (a) electrical energy (b) light energy

• (b) chemical potential energy (b) light energy

The cheetah has __________________ when it runs to catch its prey.

• chemical potential energy

• kinetic energy

• gravitational potential energy

• heat energy

Two identical cars are travelling on the same road at different speed. Which car has more kinetic energy? Why?

• Red car. It is travelling at a faster speed.

• Green car. It is travelling at a slower speed.

• Red car. It has a bigger mass.

• Green car. It has a smaller mass.

Two vehicles of different mass are travelling on a road at the same speed. Which vehicle has more kinetic energy? Why?

• Yellow bus. It has a bigger mass.

• Red car. It has a smaller mass.

• Yellow bus. It is travelling at a faster speed.

• Red car. It is travelling at a slower speed.

____________ --> _____________ --> Light and Heat energy

• Chemical potential energy --> Electrical energy

• Electrical energy --> Chemical potential energy

Which book has the most gravitational potential energy? Why?

• Book Y. It has bigger mass and is at a higher height.

• Book Z. It is at a lower height.

• Book X. It has a smaller mass and is at a higher height.

Which block has more gravitational potential energy? How do you know? (You can choose more than one answer.)

• Metal block. It has a bigger mass.

• Metal block. It will make a louder sound when dropped to the ground.

• Plastic block. It has a smaller mass.

• Plastic block. It will make a softer sound when dropped to the ground.