Sc 7 P 10 2

A wave has an amplitude of 6 m, a wavelength of 12 m and frequency of 2 Hz. Calculate the speed of the wave

• 3 m/s

• 6 m/s

• 12 m/s

• 24 m/s

Tags

NGSS.MS-PS4-1

A wave has a frequency of 4 hertz. Calculate the period of the wave.

• 4 sec

• 1 sec

• .25 sec

• Cannot be calculated

Tags

NGSS.HS-PS4-1

A flashlight uses three different forms of energy. Which of the following is the correct order of the energy transformation to power the flashlight?

• Mechanical — Thermal — Light/Heat

• Electrical — Chemical - Light/Heat

• Chemical — Electrical —Light/Heat

• Light/Heat — Electrical — Chemical

If two nerby objects vibrate a the same frequency it is said to have ______

• Standing wave

• Resonance

• Constructive inference

• Destructive inference

Tags

NGSS.MS-PS4-1

The illustration below shows what happens when two different colors of light strike a glass object. What can you conclude from the illustration?

• The glass reflects the red light.

• The glass refracts the red light.

• The glass does not transmit light.

• The glass absorbs the red light.

Tags

NGSS.MS-PS4-2

Kareem told his friend about the beautiful rainbow he saw just after a rainstorm. Kareem then explained to his friend how a rainbow forms. What was Kareem’s explanation?

• The light waves were refracted by moisture in the air and separated into colors.

• The intensity of light increased as the waves passed through tiny droplets of water.

• Light traveled faster after the rainstorm because of the moisture in the air.

• Tiny droplets of water reflected the light waves that struck them.

Tags

NGSS.MS-PS4-2

Light from the sun causes the moon to be visible at night. Which of the following causes the moon to be visible?

• refraction

• absorption

• an optical illusion

• reflection

Tags

NGSS.MS-PS4-2

Light can be reflected, refracted, and/or absorbed. Which of the following best explains how light can be changed?

• Absorption causes a change in the color of light.

• Refraction causes a change in the intensity of light.

• Reflection causes a change in the color of light.

• Refraction causes a change in the direction of light.

Tags

NGSS.MS-PS4-2

Light can sometimes create an optical illusion. For example, you may see something under water and reach into the water to pick it up. However, the object is not where you thought it would be. What property of light is responsible for this optical illusion?

• reflection

• transmission

• refraction

• absorption

Tags

NGSS.MS-PS4-2

To save energy, some people install solar panels on their homes as shown in the illustration below. What interaction between solar panels and sunlight enables people to save on energy?

• The energy of the sunlight is absorbed by the solar panels.

• The energy of the sunlight is reflected by the solar panels.

• The energy of the sunlight is refracted by the solar panels.

• The energy of the sunlight is transmitted through the house.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4