Uses of Energy

A bicycle club entered a race last weekend. The wheels spinning on the bicycle as they race are an example of -

• light energy

• mechanical energy

• electrical energy

• thermal energy

Which type of energy is most useful for roasting marshmallows over a campfire?

• thermal energy

• sound energy

• mechanical energy

• light energy

A teacher found an old pencil sharpener in her grandmother’s attic and decided to use it to sharpen pencils for her students for an upcoming test. The teacher had to turn the handle in order to make the blades inside the pencil sharpener work. Which form of energy did she need to complete this task?

• sound energy

• electrical energy

• light energy

• mechanical energy

The students at Houston Elementary like to go to the skating rink on the weekends. Which of these is not an example of the skate using mechanical energy?

• The wheels turn as the student pushes against the ground.

• Bearings in the center of the wheels help them turn smoothly.

• The wheels rotate at the same speed and are connected by an axle.

• The rubber stopper is tightly fastened to the skate.

Three different objects that produce the same type of energy are shown below. What is the energy type for these objects?

• light energy

• mechanical energy

• sound energy

• electrical energy

A child needed clean clothes for his school performance. His mother had already washed his laundry, but he needed to put the clothes in the dryer when he got home from school. Which kinds of energy were needed to dry the clothes?

• thermal, electrical, mechanical

• mechanical, light, electrical

• light, mechanical, thermal

• sound and thermal

In a science investigation, a student holds a vibrating tuning fork near a piece of cork. The student observes that the cork moves. Which of the following conclusions can be made from the investigation?

• Sound is a form of energy.

• Sound can travel through air.

• Sound energy produces light energy.

• Sound cannot travel through the cork.

A student uses a heat lamp in a terrarium to create a warm environment for her pet lizard. Which types of energy are present when the heat lamp is on?

• light, sound, mechanical

• electrical, light, thermal

• sound, thermal, electrical

• thermal, light, sound

A student made a list of activities that involve energy. Which activities on the list are examples of the use of sound energy?

• activities 1, 3, and 5

• activities 2, 3, and 5

• activities 2, 4, and 6

• activities 3, 4, and 6

When the burners on a hot air balloon are lit, the balloon begins to rise. What type of energy is causing the balloon to rise?

• Thermal energy heats the air inside the balloon causing it to rise.

• Light energy from the Sun causes the balloon to rise.

• Electrical energy from the ropes causes the balloon to rise.

• Sound energy from the wind around the balloon causes it to rise.