Grade 4 Waves in Action Review

Mason's older sister loves to tease him. She notices that he can capture sunlight with her watch face and bounce it into Mason's eyes. She keeps doing this until he screams at her to stop. What scientific concept is Mason's sister using to torment her brother?

• absorption

• conduction

• reflection

• refraction

Tags

NGSS.MS-PS4-2

Which of the following best describes what happens when a baby looks in a mirror?

• Matter from the baby's face is transformed into light waves in the mirror.

• The mirror acts as a light source that lights the baby's face.

• Light waves bouncing off the baby's face reflect off the mirror.

• The baby's eyes see light waves reflecting of the mirror as solid matter.

Tags

NGSS.MS-PS4-2

Sound also travels in waves, similar to light. As the amplitude of a sound wave increases, the sound gets louder. Which image would represent the loudest sound wave?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-1

Which letter represents the wavelength of the wave?

• point A

• line B

• point C

• line D

What advantage does the eagle gain by hunting during the day?

• The eagle can enjoy the warmth of the sun.

• The eagle can use its sense of hearing more effectively.

• The eagle can easily hide from its prey.

• The eagle can see its prey more clearly.

Tags

NGSS.MS-LS4-4

How is Barney able to fetch the ball? Put the steps in order.

• Barney chases after the ball

• Barney brings you the ball. "Good dog!"

• Light enters Barney's eyes

• Light reflects off the ball

• Information is sent to Barney's brain

Tags

NGSS.MS-LS1-8

Which of these objects does not produce (emit) light but can be seen because it reflects light?

• sun

• light bulb

• firefly

• mirror

Tags

NGSS.MS-PS4-2

What is the primary function of a mirror when a person looks into it?

• The mirror transforms the person's face into light waves.

• The mirror reflects light waves and turns them into solid matter.

• The mirror reflects light waves that bounce off the person's face.

• The mirror acts as a light source illuminating the person's face.

Tags

NGSS.MS-PS4-2

Liam needs to send a secret message to his friend who lives across the street. He is concerned about waking her parents. After careful consideration, he comes up with a model to send a message using Morse Code. Which model will work best for his situation?

• Long and short flashes of light using a flashlight.

• Long and short rings of an alarm

Tags

NGSS.MS-ETS1-2

When Jacobi strikes the drum with the mallet, it makes a sound. What causes the drum to produce this sound?

• because she is hitting it hard

• because the drum is made of wood

• because the drum skin vibrates

• because the mallet is heavy