18 Energy Resources

Which energy transformation takes place in a gasoline lawn mower?

• potential energy to electrical energy

• electrical energy to potential energy

• kinetic energy to chemical energy

• chemical energy to mechanical energy

A gasoline-powered generator is used to provide lighting for a house. Which sequence BEST describes the conversion of energy?

• mechanical, thermal, electrical, light

• electrical, chemical, mechanical, light

• chemical, mechanical, electrical, light

• thermal mechanical, chemical, light

What form of energy is stored in a battery?

• chemical

• sound

• light

• heat

Which of these processes is a conversion made by solar panels?

• mechanical energy to nuclear energy

• thermal energy to chemical energy

• kinetic energy to potential energy

• radiant energy to electrical energy

During exertion, the human body breaks down molecules of ATP. This reaction provides the energy needed for muscle contraction. This process is an example of the transformation of

• magnetic energy into gravitational energy.

• nuclear energy into mechanical energy.

• electrical energy into potential energy.

• chemical energy into kinetic energy.

A device that converts light energy into electricity used in many handheld calculators is a

• battery

• photocell

• photo generator

• photovoltaic cell

A book held 1 meter above the floor has potential energy. The book is dropped and hits the floor. To what types of energy has the potential energy of the book been converted?

• kinetic, sound and heat

• kinetic, chemical and sound

• chemical, mechanical and heat

• sound, chemical and mechanical

An amoeba uses a sugar molecule during metabolic activity. It loses energy to the environment as a result. The transformation of energy from the sugar molecule to environmental energy can be described as a transformation between which of these?

• electrical energy to radiant energy

• chemical energy to thermal energy

• electrical energy to chemical energy

• chemical energy to electromagnetic energy

When a rock is dropped from a height of one meter, the gravitational potential energy of the rock is converted to kinetic energy. When the rock hits the floor and does not bounce, what happens to the kinetic energy of the rock?

• The energy is converted to heat and sound.

• The energy is destroyed and cannot change form.

• The energy is converted to chemical energy.

• The energy is returned to gravitational energy.

What energy transformations in a flashlight occur?

• chemical energy into sound energy

• chemical energy into radiant energy

• electrical energy into nuclear energy

• electrical energy into mechanical energy