Discovery Education 4th grade: Concept 3.1 Waves

You and a friend are discussing bats and how they locate prey by using echolocation.  Your friend says this has nothing to do with waves because it’s not visible. You disagree. Read the following description of echolocation. Select the sentences that have evidence to support the idea that echolocation and waves are closely related.

Echolocation occurs when an animal uses echoes to locate objects or food. This is especially important for animals that may no be able to see in their environment. For example, when bats use echolocation, they emit sounds that travel away from them and through the surrounding air. These sounds hit objects and bounce back toward the bat. This helps the bat to "see" what is around them in their environment.

• This helps the bat "see" what is around them in their environment.

• Echolocation occurs when an animal uses echoes to locate objects or food.

• These sounds hit objects and bounce back toward the bat.

Tags

NGSS.MS-PS4-2

A student puts water in a clear plastic tub. The student then moves a pencil up and down in the water to make waves. Which is the best way the student could make waves with greater energy?

• Place the pencil on the top of the water

• Move the pencil up and down faster

• Move the pencil in an S shape

• Change the direction of the movement

Tags

NGSS.MS-PS4-1

Radiant waves and sound waves have some similarities and some differences. Read each of the following statements and decide if it relates to a RAIDIANT WAVES.

• These waves are always invisible

• These waves must travel together through matter

• For these waves, shorter wave lengths me the wave is less safe

Tags

NGSS.MS-PS4-2

Radiant waves and sound waves have some similarities and some differences. Read each of the following statements and decide if it relates to a SOUND WAVES.

• These waves are always invisible

• These waves can travel through outer space.

• For these waves, shorter wave lengths me the wave is less safe

Radiant waves and sound waves have some similarities and some differences. Read each of the following statements and decide if it relates to BOTH RAIDIANT and SOUND WAVES.

• These waves are always invisible

• These waves carry energy

• For these waves, shorter wave lengths me the wave is less safe

Tags

NGSS.MS-PS4-1

A string is shaken in such a way that a wave is produced. If 5 waves pass through a particular string at 1 point on the string in one second it is called the _________

• speed of the wave

• amplitude of the wave

• frequency of the wave

• wavelength of the wave

What happens to visible light waves when they pass through a prism? The light waves ___________.

• get brighter

• get dimmer

• separate into all the colors of a rainbow

• bounce back and do not pass through the prism

Tags

NGSS.MS-PS4-2

Light and sound both travel as waves. Which statement correctly compares these waves?

• Light waves are transverse but sound waves are longitudinal

• Sound waves can travel through a solid but light waves cant

• Light waves travel outward from a source, but sound waves do not

• Sound waves can travel through a vacuum, but light waves cannot