WJEC Unit 3.5 Electromagnetic Spectrum

Select the correct order of waves on the EMS 

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy

• Radio waves
• Ultraviolet Rays
• Gamma Rays
• X-rays

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NGSS.HS-PS4-1

Which section of the spectrum is the ONLY one we can see?

• X-rays
• Visible Light
• Gamma Rays
• Ultraviolet Rays

As the frequency of an electromagnetic wave increases, the amount of energy in that wave...

• increases.
• decreases.
• stays the same.

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The height of the wave is known as the _____________.

• amplitude
• crest
• trough
• wavelength

Electromagnetic waves vary in

• the speed they travel in a vacuum.

• wavelength and frequency.

• the way they reflect.

• the orientation of their electric and magnetic fields.

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NGSS.HS-PS4-1

The visible light spectrum ranges between

• radar waves and X-rays.

• television waves and infrared rays.

• infrared rays and ultraviolet rays.

• ultraviolet rays and gamma rays.

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X-ray photographs show softer tissue

• as invisible.

• as dark, highly exposed areas.

• the same as dense bones.

• as bright white areas.

Infrared waves are used in__________________.

• Bath tubs
• Microwaves
• Remote Controls
• Tanning

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NGSS.HS-PS4-3

NGSS.HS-PS4-5

This type of EM wave can cause skin cancer. 

• microwaves
• ultraviolet ray
• radio
• infrared

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NGSS.HS-PS4-3

NGSS.HS-PS4-4