Unit 4 Review (2024)

EMS Review

The electromagnetic spectrum shows the range of electromagnetic radiation: radio waves, microwaves, ultraviolet, visible light, infrared, x-rays, and gamma rays. The spectrum arranges the radiation in order of frequency and wavelength.

The image shows the seven radiations in order of increasing frequency.



**Red martians invade Venus using X-ray guns.

Multiple Choice

How are the components of the EMS, from radio waves to gamma rays, grouped?

• according to their speed

• according to their velocity

• according to their wavelength

• according to their visibility.

Reorder

Reorder the following from longest wavelength to shortest

• radio

• microwave

• infrared

• visible light

• ultraviolet

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Reorder

Reorder the following in order from shortest wavelength to the longest.

• Gamma Ray

• X-Ray

• Ultraviolet

• Visible Light

• Infrared

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

Where is visible light located on the electromagnetic spectrum?

• between infrared and ultraviolet rays

• between radio waves and infrared rays

• between X-rays and gamma rays

• between radio waves and microwaves

In electromagnetic waves, the relationship between frequency and energy is directly proportional.

Short wavelength=high frequency=high energy

Long wavelength=low frequency=low energy

​

​Frequency vs. Wavelength

Multiple Choice

Which of the following types of electromagnetic waves have the shortest wavelengths?

• infrared

• x-rays

• radio waves

• ultraviolet

Multiple Choice

Which electromagnetic waves have the highest frequency?

• microwaves

• gamma rays

• ultraviolet rays

• radio waves

Multiple Choice

Which of the following statements correctly compares the frequency and energy of infrared waves and ultraviolet waves?

• Infrared waves have lower frequencies than ultraviolet waves. Since frequency and energy are directly proportional, infrared waves also have less energy than ultraviolet waves.

• Infrared waves have lower frequencies than ultraviolet waves. Since frequency and energy are inversely proportional, infrared waves also have more energy than ultraviolet waves.

• Infrared waves have higher frequencies than ultraviolet waves. Since frequency and energy are directly proportional, infrared waves also have more energy than ultraviolet waves.

• Infrared waves have higher frequencies than ultraviolet waves. Since frequency and energy are inversely proportional, infrared waves also have less energy than ultraviolet waves.

Multiple Choice

Which statement BEST compares a gamma ray to a radio wave?

• A gamma ray has more energy than a radio wave because it has a longer wavelength and lower frequency.

• A gamma ray has more energy than a radio wave because it has a shorter wavelength and a higher frequency.

• A gamma ray has more energy than a radio wave because it has a shorter wavelength and lower frequency.

• A gamma ray has more energy than a radio wave because it has a longer wavelength and a higher frequency.

Multiple Choice

Which statement BEST describes the frequency and wavelength of waves that are the most energetic?

• Waves that have low frequency and long wavelengths.

• Waves that have low frequency and short wavelengths.

• Waves that have high frequency and long wavelengths.

• Waves that high frequency and short wavelengths.

Multiple Choice

Based on this information, which statement can the student BEST make to explain the difference between radio waves and x-rays?

• The shorter wavelength of x-rays indicates that they are less common.

• The shorter wavelength of x-rays indicates that they have more energy.

• The shorter wavelength of X-rays indicates that they have a higher temperature and can more easily cause burns.

• The shorter wavelength of X-Ryas indicates that their particles are heavier and can travel farther through matter.

Multiple Choice

Ultraviolet rays have a higher frequency than microwaves. Which statement BEST compares the wavelength and energy of ultraviolet rays to microwaves?

• Ultraviolet rays have a longer wavelength and less energy than microwaves.

• Ultraviolet rays have a shorter wavelength and less energy than microwaves.

• Ultraviolet rays have a longer wavelength and more energy than microwaves.

• Ultraviolet rays have a shorter wavelength and more energy than microwaves.

​Roy G. Biv

​The visible part of the electromagnetic spectrum is often abbreviated ROYGBIV based on the first letters of each color's name (red-orange-yellow-green- blue-indigo-violet).

​Visible light is the range of the electromagnetic spectrum humans can see. ROY G BIV represents the colors of visible light. Colors are arranged from longest to shortest wavelength. Red has the longest wavelength.

Reorder

Arrange the colors of the visible light spectrum in order of decreasing frequency.

• violet

• indigo

• blue

• green

• yellow

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Reorder

Arrange in order of longest to shortest wavelength.

• red

• orange

• yellow

• green

• blue

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Drag and Drop

Which of the following has a wavelength shorter than that of visible light?​

Placeholder

Drag these tiles and drop them in the correct blank above

ultraviolet

microwave

infrared

radio

Multiple Choice

What type of electromagnetic radiation does the sun emit?

• gamma rays and ultraviolet radiation

• ultraviolet radiation only

• infrared, visible, and ultraviolet radiation

• all types of electromagnetic radiation

Multiple Choice

What does sunscreen lotion do to interfere with the transfer of energy from the sun to a person's skin?

• Absorbs the radiation coming from the sun.

• Causes the skin cancer from the radiation emitted from the skin

• Reflects most of the UV radiation.

• Causes skin exposed to the sun.