Energies

Front

What is energy?

Back

Energy is the capacity to do work.

Answer explanation

Energy is defined as the capacity to do work, which means it is the ability to cause change or perform tasks. The other options incorrectly describe energy as matter, speed, or currency.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Front

How is work transferred on an object?

Back

Work is transferred by applying a force to an object over a distance.

Answer explanation

Work is transferred by applying a force to an object over a distance, which is the fundamental definition of work in physics. The other options do not accurately describe how work is done on an object.

Tags

NGSS.MS-PS3-5

Front

What is the difference between kinetic and potential energy?

Back

Kinetic energy is energy of motion; potential energy is stored energy based on position.

Answer explanation

Kinetic energy refers to the energy of an object in motion, while potential energy is the stored energy based on an object's position. The correct choice accurately defines both types of energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Front

What are the examples of kinetic energy?

Back

Examples of kinetic energy include a moving car, a flying airplane, a flowing river, a rolling ball, and a running person.

Answer explanation

Kinetic energy is the energy of motion. Examples include a moving car, a flying airplane, a flowing river, a rolling ball, and a running person, all of which are in motion, unlike the parked car, stationary rock, or frozen lake.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Front

Example of potential energy: A spinning top, A compressed spring, A flowing river, A moving bicycle

Back

A compressed spring

Answer explanation

A compressed spring stores energy due to its position, making it a clear example of potential energy. In contrast, a spinning top, flowing river, and moving bicycle are examples of kinetic energy.

Tags

NGSS.MS-PS3-2

Front

How does thermal energy relate to temperature?

Back

Thermal energy is the total kinetic energy of particles in a substance, while temperature is the average kinetic energy.

Answer explanation

Thermal energy refers to the total kinetic energy of all particles in a substance, while temperature measures the average kinetic energy of those particles. Thus, they are related but not the same.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

Potential energy depends on:
- mass and height
- height and speed
- mass and speed
- height and force

Back

mass and height

Answer explanation

Potential energy is calculated using the formula PE = mgh, where PE is potential energy, m is mass, g is the acceleration due to gravity, and h is height. Therefore, it depends on mass and height, making the correct choice 'mass and height'.

Front

Which is an example of potential energy?

• a roller coaster speeding down a hill
• the pulled back string on an archer's bow
• releasing the strings on a guitar
• an electric current lighting a light bulb

Back

the pulled back string on an archer's bow

Answer explanation

The pulled back string on an archer's bow is an example of potential energy because it stores energy due to its position. In contrast, the other options involve kinetic energy or energy in use.

Tags

NGSS.MS-PS3-2

Front

Type of energy that is stored in an object; energy that an object has because of its position relative to other objects. (Example: pulled back rubber band)

Back

Potential Energy

Answer explanation

Potential Energy is the energy stored in an object due to its position, such as a pulled back rubber band. In contrast, Kinetic Energy is the energy of motion, while Solar and Mechanical Energy refer to different forms of energy.

Tags

NGSS.MS-PS3-2

Front

Which has more potential energy?

• A bird in a tree
• A car in the garage
• An airplane before takeoff
• A child on a swing

Back

A bird in a tree

Answer explanation

A bird in a tree has more potential energy due to its height above the ground. Potential energy increases with height, making the bird's position in the tree the highest among the options.

Tags

NGSS.MS-PS3-2