Energy Pretest

Mechanical energy is the sum of an object’s potential and kinetic energy

• True

• False

How could two objects have the same temperature but different thermal energies?

• one object could have more heat

• one object could have more calories

• one object could have more particles and less total kinetic energy

• one object could have more particles and greater total kinetic energy

Answer explanation

Thermal energy measures all the total kinetic energy an object has.

The ocean holds so much water that it has the greatest kinetic energy out of all liquids, even when it is cold, because each atom in the ocean has energy! When you add them all up, you have thermal energy

Tags

NGSS.HS-PS3-4

What is any energy resource that can be used in place of fossil fuels called?

• alternative energy

• solar energy

• nuclear energy

• biomass energy

Energy exists in different forms.  Which of the following forms of energy best describes the energy stored in food?

• electromagnetic energy

• mechanical energy

• sound energy

• chemical energy

Tags

NGSS.MS-LS1-7

Which of the following is the transfer of energy as heat by the movement of a liquid or gas?

• conduction

• convection

• emission

• radiation

Tags

NGSS.MS-ESS2-6

Which of the following terms means the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius?

• Heat

• Temperature

• Thermal Energy

• Calorie

A mass hanging from a spring moves up and down.  The mass stops moving temporarily each time the spring is extended to its fullest at position 2 and each time it returns to its tight coil at position. Which answer choice best describes the type of energy the spring has at position 1?

• potential energy

• kinetic energy

• both potential and kinetic

• neither potential or kinetic

Answer explanation

Both kinetic and potential is correct! This is because energy is changing forms from potential to kinetic as the spring stretches downward.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-1

What is the difference between a conductor and an insulator

• Wood is a good conductor but not a good insulator

• Metal is a good insulator but not a good conductor

• A conductor transmits energy very well but an insulator does not

• An insulator transmits energy very well but a conductor does not

Answer explanation

An example of a conductor is a copper wire. This allows electrical energy to pass through it.

An example of an insulator is the rubber coating around a copper wire. This allows you to pick up the wire without getting shocked because it does not allow electrical energy to pass through it.

Heat is the energy transferred from an object at a higher temperature to an object at a lower temperature

• True

• False

Tags

NGSS.MS-PS3-5

NGSS.MS-PS1-4

which point has the most potential energy

• D

• F

• B

• A

Tags

NGSS.MS-PS3-2