Physics Year 8

What happens to energy when it is transformed?

• Some of the energy is transformed, and some is destroyed.

• Energy is usually converted into more than one form.

• All of the energy is converted to the same form as it is always conserved.

• Only a small percentage is converted into another form.

What is the main energy input used by an oven?

• Electrical energy

• Kinetic energy

• Heat energy

• Sound energy

What is the main energy output produced by an oven?

• Electrical energy

• Kinetic energy

• Heat energy

• Sound energy

What is the main energy input used by a petrol-fuelled car?

• Chemical energy

• Light energy

• Heat energy

• Sound energy

What is the main energy output produced by a petrol-fuelled car?

• Chemical energy

• Light energy

• Heat energy

• Kinetic energy

What is the main energy input/s used by a wind-up toy car that moves across the floor?

• Kinetic energy

• Sound energy

• Electrical energy

• Elastic potential energy

• A & D

What is the main energy output produced by a wind-up toy car that moves across the floor?

• Kinetic energy

• Sound energy

• Electrical energy

• Elastic potential energy

When Becky dances, she moves her arms and legs, she sings and she gets hot. What is the source of energy input for her dancing?

• Kinetic energy

• Chemical energy

• Heat energy

• Sound energy

When Becky dances, she moves her arms and legs, she sings and she gets hot. Which type of energy is produced when Becky dances?

• Kinetic energy

• Sound energy

• Heat energy

• All of the above

The image is of a pizza package nutritional information label. John consumes 250 g of pizza. Calculate the energy (in kJ) contained in this amount of pizza.

• 922 kJ

• 3134 kJ

• 220 kJ

• 2305 kJ