Grade 4 Waves in Action Review

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

• 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 fce 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

The diagram depicts a longitudinal wave. Which line represents the wavelength of the wave?

• line W

• line X

• line Y

• line Z

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.

• Light enters Barney's eyes

• Barney chases after the ball

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

• Information is sent to Barney's brain

• Light reflects off the ball

Tags

NGSS.MS-LS1-8

Which of these objects does not 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

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

• Long and short flashes of light using a flashlight.

• Long and short rings of an alarm

Tags

NGSS.MS-ETS1-2

When Leilani 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