Quiz about Unit 5 Test

Question 1

Sid pushes a rock off his desk.

What happens to the mechanical energy of the rock as it falls?

Accepted Answer

it stays the same.

Answer

It increases.

Answer

It loses kinetic energy.

Answer

It gains potential energy.

Question 2

Erin records several statements about kinetic energy in her notebook. Which is true?

Accepted Answer

Kinetic energy is the energy of motion.

Answer

Kinetic energy is the energy of an object at rest.

Answer

Kinetic energy will cause motion in an object at rest.

Answer

Kinetic energy is the total amount of potential energy and mechanical energy.

Question 3

Sound is a form of energy. Which is a form of light energy and heat energy but not sound energy?

Accepted Answer

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Question 4

Ella turns the propeller of a toy plane. By doing so, she twists a rubber band. She has to hold the propeller to keep the rubber band from turning it. What happens to the propeller's energy when Ella lets go?

Accepted Answer

Potential energy changes into kinetic energy.

Answer

Kinetic energy decreases.

Answer

Potential energy increases.

Answer

Kinetic energy changes into electrical energy.

Question 5

In which object is electrical energy changed into sound energy and kinetic energy?

Accepted Answer

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Question 6

Joshua turns on the television. Which happens to the electrical energy that powers the television?

Accepted Answer

It changes into light, sound, and heat energy.

Answer

It changes into light energy.

Answer

It changes into sound and potential energy.

Answer

It changes into light and potential energy.

Question 7

Lisa wrote these notes about energy. Which is incorrect?

Accepted Answer

mechanical energy changes as an object falls toward Earth's surface.

Answer

potential energy is stored energy.

Answer

kinetic energy is the energy of motion.

Answer

electrical energy can change into light energy.

Question 8

This toy has stopped making noise. Joaquin turns a knob. When Joaquin lets go of the knob, what will happen?

Accepted Answer

Potential energy will change into kinetic energy and sound energy.

Answer

Kinetic energy will change into sound energy.

Answer

Kinetic energy will change into potential energy.

Answer

Electrical energy will change into potential energy.

Question 9

Chen shines a flashlight onto a ceiling. He places a dime in the center of the flashlight beam, so it partly covers the light. How would the beam of light and the shadow made by the dime appear on the ceiling?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 10

Farn records how her family uses energy in their home. Which statement should she change?

Accepted Answer

Light energy comes only from light bulbs.

Answer

Electrical energy makes some appliances run.

Answer

Sound energy is used to communicate with others.

Answer

Heat energy is used to cook foods and warm the home.

Question 11

Jorge carried out an investigation to show that light travels in a straight line. He drew a picture of his set up and shared it with his classmate Henry. What question should Henry ask Jorge so that Henry can use a similar setup?

Accepted Answer

Where was the light source?

Answer

What temperature was the paper?

Answer

What color was the paper?

Answer

What tupe of table was used?

Question 12

A round spotlight creates a round area of light that surrounds a singer. Which sentence is the best explanation for this evidence?

Accepted Answer

Light travels in a straight line.

Answer

Light is always around.

Answer

Light travels downward.

Answer

Light reflects off the stage.

Question 13

Lee draws a picture of a palm tree. The tree creates a shadow on the sand. Which letter shows where the sun should be in Lee's picture?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 14

Two groups of students held up a mirror and shined a flashlight on it. Group 1 observed that the light was reflect3e back towards the flashlight. Group 2 observed that the light was a reflected to the right. What can explain the difference?

Accepted Answer

Group 2 held its mirror at an angle.

Answer

One flashlight was a brighter.

Answer

One mirror was larger.

Answer

Group 1 did not darken the room.

Question 15

Celine holds a shiny plastic plate in the light. She sees a spit of light on the wall. What claim can you make about the plate?

Accepted Answer

It reflects light onto the wall.

Answer

It reflects light into the air.

Answer

It absorbs the light.

Answer

It refracts the light.

Question 16

Daniella has a box with holes in three sides. She shines a flashlight into the hole in front. The light shines out of the hole on the right. What conclusion can you draw?

Accepted Answer

There is a mirror reflecting the light to the right.

Answer

Another light is in the box.

Answer

The light on the left is absorbed by the box.

Answer

The light is bending around an object that blocks its path.

Question 17

Which of these names the ways that light changes directions?

Accepted Answer

refraction and reflection

Answer

refraction

Answer

reflection

Answer

refraction and absorption

Unit 5 Test

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