WAVES UNIT TEST

Why can television satellites, which broadcast information as electromagnetic radiation, send signals from the vacuum of space?

• Because electromagnetic radiation increases as the distance increases

• Because electromagnetic radiation does not need a medium to travel through.

• Because space does not provide a medium that will block the satellite signals

• Because space is so vast that light can spread out to the full size and strength

In which medium would sound travel the fastest?

• across a room

• in a lake

• through a spoon

• through outer space

Tags

NGSS.MS-PS4-2

You see lightning before you hear thunder because

• light waves can travel through a vacuum.

• light waves travel faster than sound waves

• sound waves cannot travel through the air

• sound waves travel faster than light waves

Compression or sound waves behave a lot like transverse or electromagnetic waves. Compression waves exhibit ALL BUT one of the following behaviors. That is

• reflection

• transfer energy

• refraction

• travel through a vacuum

Tags

NGSS.MS-PS4-2

Which characteristic is the SAME for all forms of electromagnetic energy on the EM spectrum?

• They all travel at the same speed

• They all have the same amount of stored energy

• They all have the same size wavelengths

• They all can be detected by the human eyes

Which type of wave would actually slow down when moving from the air into the ocean?

• Sound Waves

• Earthquake waves

• Light Waves

• Ocean surface waves

Which of these is a TRUE statement?

• Sound travels through gases easier than liquids.

• Sound travels through solids easier than liquids.

• Sound sometimes travels easier through gases than solids.

• Sound travels through solids, liquids, and gases at the same speed.

Tags

NGSS.MS-PS4-2

Sunlight is slowed MOST when traveling through

• water.

• the atmosphere

• a vacuum.

• None of these, as light always travels at the same speed.

Tags

NGSS.MS-PS4-2

In this technological world, people are starting to worry about the effects of radiation and electromagnetic waves on living tissue. A study was conducted that examined pregnant women's exposure to various electromagnetic waves and the incidence of mutations that resulted in birth defects. Scientists studied the effects of the following ER waves: UV, infrared, microwaves, radio waves, X-rays, and visible light. According to the study, only X-rays produced a noticeable increase in mutations that resulted in

birth defects. Which letter MOST likely represents X-rays?

• A

• G

• C

• D

Tags

NGSS.MS-LS3-1

The visible light spectrum is usually said to consist of red, orange, yellow, green, blue, indigo, and violet. All of these colors combined make

• Blue ocean

• White light

• Black skies

• a color wheel