Energy Review

The ability to do work (move) is called...

• Matter

• Energy

• Weight

• Force

Answer explanation

The ability to do work or cause movement is defined as energy. It is the capacity to perform work, unlike matter, weight, or force, which are related but do not directly describe the ability to do work.

Tags

NGSS.MS-PS3-5

The SI Unit for Energy is

• Joule

• Potential

• Calorie

• Kilojoule

Answer explanation

The SI unit for energy is the Joule, which is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter. Other options like Calorie and Kilojoule are not SI base units.

Tags

NGSS.MS-PS3-5

Which of the following is NOT a form of energy?

• Thermal

• Mechanical

• Sound

• Water

Answer explanation

Water is a substance, not a form of energy. Thermal, mechanical, and sound are all types of energy that can be transferred or converted, while water itself does not represent energy.

True or false: Energy cannot change from one type to another.

• True

• False

Answer explanation

False is correct because energy can change forms, such as from kinetic to potential energy, as described by the law of conservation of energy. This principle shows that energy is not lost but transformed.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

Energy that is stored is called...

• Kinetic Energy

• Potential Energy

• Mechanical Energy

• Thermal Energy

Answer explanation

Energy that is stored for potential use in the future is known as Potential Energy. Unlike Kinetic Energy, which is the energy of motion, Potential Energy is related to an object's position or state.

Tags

NGSS.MS-PS3-2

What is kinetic energy?

• moving energy

• potential energy

• stored energy

• renewable energy

Answer explanation

Kinetic energy refers to the energy of an object in motion, making 'moving energy' the correct choice. It is distinct from potential energy, which is stored energy, and does not relate to renewable energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

At what position does the pendulum have the greatest gravitational potential energy?

• Position D

• Position C

• Position B

Answer explanation

The pendulum has the greatest gravitational potential energy at Position D, which is the highest point in its swing. At this position, the pendulum is furthest from the ground, maximizing its potential energy.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

At what position does the pendulum have the greatest kinetic energy?

• Position D

• Position C

• Position B

Answer explanation

The pendulum has the greatest kinetic energy at Position C, where it is at its lowest point. At this position, the potential energy is converted to kinetic energy, resulting in maximum speed and kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Gravitational potential energy depends on

• Mass and velocity

• Mass and weight

• Mass and height

• Height and distance

Answer explanation

Gravitational potential energy is determined by an object's mass and its height above a reference point. The formula is PE = mgh, where m is mass, g is gravitational acceleration, and h is height.

Tags

NGSS.MS-PS3-2

Which character has the greatest gravitational potential energy?

• Character A

• Character B

• Character C

• Character D

Answer explanation

Character A has the greatest gravitational potential energy because it is positioned at the highest elevation compared to the other characters, which directly influences its potential energy according to the formula PE = mgh.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2