Energy Transformations weekly Test

The diagram shows a swinging pendulum. At what point in its swing is the pendulum’s kinetic energy greatest?

• Point F

• Point G

• Point H

• Point J

Gasoline provides energy to move cars. To release the energy, the gasoline must be burned. In what form is the energy in gasoline before it is burned?

• Gravitational Potential energy

• Kinetic energy

• Elastic Potential energy

• Chemical Potential energy

When plants carry out photosynthesis, they use energy from the sun to make sugar. What energy transformation takes place during photosynthesis?

• Chemical energy → electrical energy

• Light energy → Electrical energy

• Electrical energy → light energy

• Light energy → chemical energy

The diagram shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon?

• Mechanical energy → Light energy → Chemical energy

• Chemical energy → Mechanical energy → Thermal energy

• Thermal energy → Chemical energy → Light energy

• Chemical energy → Thermal energy → Mechanical energy

A tennis ball is dropped down a staiwell. Which statement BEST describes the energy of the tennis ball?

• The tennis ball's kinetic energy decreases as it falls to the ground.

• The tennis ball has the most potential energy just before it is dropped.

• The tennis ball has the most kinetic energy as soon as it is dropped.

• The tennis ball's potential energy increases as it falls to the ground.

The diagram shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50m higher than Airplane X. Which statement best describes the energy of the two airplanes?

• Airplane W has a greater kinetic energy than Airplane X

• The 2 airplanes have the same gravitational potential energy but different kinetic energy

• Airplane X has more gravitational potential energy than Airplane W

• The 2 airplanes have the same kinetic energy but different gravitational potential energy

Which device works by converting electrical energy into light energy?

• An Electrical Power plant

• An electrical fan

• An incandescent bulb (light bulb)

• A burning log

In what position is the diver having the greatest Potential energy?

• Position 1

• Position 2

• Position 3

• Position 4

When you turn a toaster on, electricity moves to the coils inside the toaster, causing them to glow and get hot. According to the law of conservation of energy, the coils get hot because electrical energy

• is changed into matter

• is destroyed

• is created

• is converted into heat energy

A student turns a battery-operated fan. The batteries are located in the base of the fan. After five minutes, the student notices that the base of the fan is warm. Which statement BEST describes the conversion of energy taking place in the fan?

• Chemical energy is being converted into mechanical and light energy

• Chemical energy is being converted into mechanical and thermal energy

• Electrical energy is being converted into chemical and light energy

• Electrical energy is being converted into thermal and sound energy