7th Grade Science Help
Electromagnetic Spectrum - All Activities
Everything on one page: spelling, matching, ordering, and the study guide. Use the hub if you prefer each activity on its own page.
Spell the Spectrum Word
Press "Hear Word" to listen, "Slow Word" for slower audio, then spell it.
Select “Speak” to practice pronunciation with your voice.
Start typing above to see draggable letters.
Words in set
7
Accuracy
0%
Recent Streak
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Word Bank
Tap a word to autofill your answer.
Recent Words
Correct words will appear here.
Match the word to its definition
Choose the correct vocabulary word for each definition.
7 to go
Waves that carry music, voice, and TV signals. They travel very far.
Waves that heat food and help phones send messages.
"Heat waves." We cannot see them, but we feel them as warmth.
Light we can see with our eyes. All colors.
Waves from the sun we cannot see. Can cause sunburn.
Waves doctors use to see bones inside the body.
Very strong waves that come from space and some medical machines.
Spell Every Spectrum Word
Type each wave name. Use the scrambled letters and definition clue for help.
Definition clue
Waves that carry music, voice, and TV signals. They travel very far.
Definition clue
Waves that heat food and help phones send messages.
Definition clue
"Heat waves." We cannot see them, but we feel them as warmth.
Definition clue
Light we can see with our eyes. All colors.
Definition clue
Waves from the sun we cannot see. Can cause sunburn.
Definition clue
Waves doctors use to see bones inside the body.
Definition clue
Very strong waves that come from space and some medical machines.
Order the Spectrum
Start with the longest wavelength (Radio Waves) and finish with the shortest, most energetic waves (Gamma Rays).
Reading
The spectrum moves from long waves with low energy to short waves with high energy. Radio Waves travel far and carry music and voice. Microwaves help phones talk to towers and heat food. Infrared Waves carry heat, and Visible Light is the tiny band we see. Ultraviolet (UV) comes from the sun and can cause sunburn. X-rays pass through soft tissue to show bones, and Gamma Rays carry the most energy of all.
Tip: Think "longer = safer, shorter = stronger."
Study Guide
Quick meanings for every wave word.
| Word | Meaning |
|---|---|
| Radio Waves | Waves that carry music, voice, and TV signals. They travel very far. |
| Microwaves | Waves that heat food and help phones send messages. |
| Infrared Waves | "Heat waves." We cannot see them, but we feel them as warmth. |
| Visible Light | Light we can see with our eyes. All colors. |
| Ultraviolet (UV) | Waves from the sun we cannot see. Can cause sunburn. |
| X-rays | Waves doctors use to see bones inside the body. |
| Gamma Rays | Very strong waves that come from space and some medical machines. |