Energy Transformations Quiz

A student turns on a battery-operated flashlight. After five minutes of being on, the student noticed that the top of the flashlight was warm. Which statement BEST describes the conversion of energy taking place in the flashlight?

• Chemical energy is being converted into mechanical energy and light energy.

• Chemical energy is being converted into light energy and thermal energy.

• Electrical energy is being converted into chemical and light energy.

• Electrical energy is being converted into thermal energy and sound energy.

A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then, she travels down the hill. The diagram shows the rider in three different positions. Which of these correctly describes the potential energy and the kinetic energy of the bicycle rider?

• When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.

• As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases.

• When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases.

• As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease.

Fill in the blanks to describe the energy transformation that occurs in a hairdryer. A hairdryer uses (a)   energy to give off​ (b)   energy (c)   energy when it is turned on.

• electrical
• thermal
• sound
• chemical
• light
• elastic

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

• The light energy and thermal energy stored in the match changed to mechanical energy.

• The thermal energy stored in the match changed to light energy and chemical energy.

• The chemical energy stored in the match changed to thermal energy and light energy.

• The light energy and thermal energy stored in the match changed to chemical energy.

How does the human body convert chemical energy from food into different forms of energy?