Module L Waves HMH

PJ holds his hand close to a hot surface. He can feel the infrared waves but cannot see them. What explains PJ’s observation?

• Infrared waves can only travel very short distances.

• Infrared waves are too dim for his eyes to see them.

• Infrared waves have a different wavelength than visible light.

• The air absorbs infrared waves before they can reach his eyes.

Tags

NGSS.MS-PS4-2

Katy is making waves in a tub of water by pushing a block up and down at one end of the tub. She observes the properties of each of the waves. What can she say about the properties of the waves?

• Pushing harder on the block gives the waves more speed, and they will have a longer wavelength.

• Pushing harder on the block gives the waves more speed, and they will have a higher frequency.

• Pushing harder on the block gives the waves more energy, and they will have a larger amplitude.

• Pushing harder on the block gives the waves more energy, and they will have a faster period.

Tags

NGSS.MS-PS4-1

Which statement describes how sound waves travel through a medium?

• Sound waves are transferred from molecule to molecule in a medium.

• Sound waves pass through the spaces between the molecules of a medium.

• Sound waves push all the molecules of a medium in front of them, creating a shock wave.

• Sound waves pass through the molecules of a medium because the molecules are transparent.

A fisherman is using a spear to hunt for fish. The diagram shows two possible locations of a fish in the water.

• position A because light refracts as it exits the water

• position B because light refracts as it exits the water

• position A because the light is transmitted through the water

• position B because the light is transmitted through the water

Tags

NGSS.MS-PS4-2

As Pablo listened to a tone, he heard its pitch go up. Which sound wave characteristic increases with pitch?

• amplitude

• frequency

• velocity

• wavelength

Which of these will double the energy of a wave?

• halve the frequency

• double the amplitude

• halve the wavelength

• double the wavelength

Tags

NGSS.MS-PS4-1