Energy Unit Review

Energy Unit Review

Practice and Challenge Ourselves on our Energy Transfer and Transformation Skills

Multiple Choice

 

On a summer day, the asphalt is hot on your bare feet because the asphalt has ______ thermal energy from the sun.

• absorbed

• reflected

• transmitted

• scattered

Multiple Choice

One way a solar oven works is by transferring energy from the sun into...

• electrical energy in the oven

• thermal energy in the food or water inside

• chemical energy in the food or water inside

• motion energy in the oven

Multiple Choice

What is the law that states that energy cannot be created or destroyed, but can change from one type to another?

• Law of Inertia

• Law of Gravity

• Law of Conservation of Energy

• Law of Conservation of Matter

Multiple Choice

When an object has stored energy, but has not moved yet, it has:

• Kinetic Energy

• Electrical Energy

• Potential Energy

• Sound Energy

Multiple Choice

The following methods will melt an ice cube quickly, except:

• break it into pieces and warm up the pieces

• put it in a glass of room temperature water

• put it in an insulating container

• hold it in your hand and change hands when one hand gets cold

Multiple Choice

The amount of thermal energy that can be stored in an object depends on:

• its mass

• the energy supplied

• the type of substance

• all the factors described here

Multiple Choice

When an object is in motion, it has ___________ energy.

• potential

• kinetic

• frictional

• chemical

Multiple Choice

What energy transformation takes place when a lamp is plugged in and turned on?

• kinetic to potential

• electrical to sound

• electrical to light

• battery to motion

Multiple Choice

What is the transfer of heat by the circulation or movement of liquids and gases (air)?

• Conduction

• Convection

• Radiation

• Energy

Multiple Choice

Objects of different masses are suspended from a height. Which combination of features will have the greatest gravitational potential energy?

• high mass and low height

• high mass and high height

• low mass and low height

• low mass and high height

Multiple Choice

What do we call a change from one form of energy to another?

• Energy form

• Energy transformation

• Kinetic energy

• Potential energy

Multiple Choice

Which position has the greatest kinetic energy?

• Position 1

• Position 4

• Position 3

• Position 5

Multiple Choice

Use the given diagram to answer the question. At which point(s) is the gravitational potential energy the highest?

• At points A and E

• At points B and D

• Only at point A

• Only at point C

Multiple Choice

When you open the door to a refrigerator for a minute, what happens first?

• Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator.

• Thermal energy in the refrigerator is transferred to the air outside the refrigerator.

• The temperature of the air inside the refrigerator decreases.

• The temperature of the air just outside the refrigerator increases.

Multiple Choice

Energy from the Sun reaches the Earth through a type of energy transfer known as:

• Conduction

• Convection

• Radiation

• Energy

Multiple Choice

Heating an object to a higher temperature increases that object's:

• potential energy

• thermal energy

• chemical energy

• kinetic energy

Multiple Choice

If you placed an object that was 90° Celsius in a room that is 25° Celsius, which of the following statements is correct?

• The air in the room will transfer cooling energy to the object.

• The temperature of both the room and the object will stay the same.

• Thermal energy from the hot object will be transferred to the cold air in the room.

• The air will lose thermal energy while the hot object gains thermal energy

Multiple Choice

What is a conductor?

• a material or device that prevents energy to pass through

• a material or device that involves a train

• something we have not talked about in this unit

• a material or device that allows energy to pass through easily

Multiple Choice

What is a insulator?

• a material or device that is inside

• a material which does not allow the energy to pass through

• a material that allows energy to pass through easily

• something we have not talked about in this unit

Multiple Choice

Cory noticed that the hood of his car was hot after driving it for awhile. What energy transformation was he noticing?

• motion (kinetic) -----> thermal energy

• chemical energy -----> thermal energy

• thermal energy -----> motion (kinetic)

• temperature energy -----> braking energy

Multiple Choice

A plastic spatula and metal tongs are both at the same temperature. The metal feels colder when you touch it. This is because:

• metal conducts thermal energy from your hand better than plastic does

• the metal tongs have more motion than the plastic spatula

• metal contains more thermal energy than plastic

• plastic loses more thermal energy than metal

Multiple Choice

Light energy from the Sun travels through space by:

• conduction

• convection

• radiation

• insulation