The Electromagnetic spectrum online exercise for - Free Printable

Let’s solve this step by step.

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Part 1: Labeling the Electromagnetic Spectrum

We are given a word bank:
- Gamma Ray
- X-ray
- Ultraviolet
- Radio
- shorter
- higher
- Visible
- Infrared
- Microwave
- longer
- lower

The diagram shows the electromagnetic spectrum from left to right, with waves getting “stretched out” (longer wavelength) as we go right. The colored bar in the middle is visible light — that’s our anchor point.

From left to right, the order of the EM spectrum (by increasing wavelength / decreasing frequency/energy) is:

Gamma Ray → X-ray → Ultraviolet → Visible → Infrared → Microwave → Radio

So let’s fill in the boxes above the line (from left to right):

Leftmost box (shortest wavelength, highest energy): Gamma Ray
Next: X-ray
Then: Ultraviolet
Middle (colored part): Visible
Then: Infrared
Then: Microwave
Rightmost: Radio

Now for the blanks below the arrows:

On the LEFT side (where waves are tight = short wavelength):

- Wavelength: shorter
- Frequency: higher
- Energy: higher

On the RIGHT side (where waves are stretched = long wavelength):

- Wavelength: longer
- Frequency: lower
- Energy: lower

✔ So all labels are filled correctly based on how EM waves behave: shorter wavelength = higher frequency and energy; longer wavelength = lower frequency and energy.

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Part 2: Answering Questions About Uses and Properties

Let’s go one by one:

a. has the largest waves
→ Largest waves = longest wavelength → Radio

b. is the most dangerous
→ Highest energy = can damage cells/DNA → Gamma Ray

c. is used for warming the skin
→ Heat lamps, thermal imaging → Infrared

d. is used to see broken bones
→ Medical imaging through soft tissue → X-ray

e. are used in cellphones and radar
→ Communication and detection → Microwave

f. helps the skin to make vitamin D
→ Sunlight triggers vitamin D production → Ultraviolet

g. is used to see
→ Our eyes detect this → Visible

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Final Answer:

Part 1 Labels (left to right above the line):
Gamma Ray, X-ray, Ultraviolet, Visible, Infrared, Microwave, Radio

Below the arrows:
Left side: shorter, higher, higher
Right side: longer, lower, lower

Part 2 Answers:
a. Radio
b. Gamma Ray
c. Infrared
d. X-ray
e. Microwave
f. Ultraviolet
g. Visible