Energy

Which types of energy does a coiled spring primarily contain?

• elastic

• radiant

• electrical

• thermal

Answer explanation

A coiled spring primarily contains elastic energy, which is stored in the spring when it is compressed or stretched.

Which of the following types of energy is associated with movement?

• gravitational

• potential

• kinetic

• chemical

Answer explanation

Kinetic energy is associated with movement as it is the energy of an object due to its motion.

Which of the following types of energy is NOT associated with movement?

• thermal

• potential

• kinetic

• radiant

Answer explanation

The correct choice is potential energy because it is energy stored in an object due to its position or state, not associated with movement.

Which of the following types of energy is stored in entities?

• thermal

• potential

• kinetic

• radiant

Answer explanation

Potential energy is stored in entities, unlike thermal, kinetic, or radiant energy which are forms of energy rather than stored in entities.

Nuclear energy is associated with which of the following?

• Chemical bonds between molecules

• The binding of electrons within the nuclei of atoms

• Moving electrons

• The binding of protons and neutrons within the nuclei of atoms

Answer explanation

Nuclear energy is associated with the binding of protons and neutrons within the nuclei of atoms.

A lamp begins with electrical energy when plugged in and turns into _________ energy when the light comes on.

• mechanical

• kinetic

• radiant

• sound

Answer explanation

The correct answer is radiant because light energy is a form of radiant energy emitted by the lamp when it is turned on.

What type of energy transformation occurs when a hawk eats a mouse and then uses that energy to fly?

• chemical to mechanical

• mechanical to chemical

• thermal to mechanical

• mechanical to thermal

Answer explanation

The correct type of energy transformation is from chemical energy stored in the mouse to mechanical energy used by the hawk to fly.

What type of energy transformation happens in hydro-electric power?

• kinetic to potential

• sound to mechanical

• chemical to electrical

• mechanical to electrical

Answer explanation

In hydro-electric power, the energy transformation that occurs is from mechanical energy (movement of water) to electrical energy, making the correct answer choice 'mechanical to electrical'.

What type of energy is stored in batteries or food?

• Potential energy

• Thermal energy

• Chemical energy

• Mechanical energy

Answer explanation

Batteries and food store chemical energy, which is released during chemical reactions to produce other forms of energy like electrical or thermal energy.

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• solar

• light

• thermal

• mechanical

Answer explanation

The microwave oven does not transform electrical energy into solar energy. It transforms electrical energy into light, thermal, and mechanical energy.