Properties of Waves - Free Printable

Let's solve this step by step.

We are given a wave diagram and a list of words to use to label parts of the wave and complete definitions. The words are:

Words to use:
- Hertz
- period
- metres
- dip
- seconds
- peak
- wavelength
- trough
- crest
- amplitude
- oscillation
- equilibrium line

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Step 1: Label the Diagram

Looking at the wave diagram:

1. Top of the wave: This is called the crest (or peak – both are synonyms in wave terminology).
2. Bottom of the wave: This is called the trough.
3. The horizontal dashed line: This is the equilibrium line – the rest position of the wave.
4. Distance from crest to crest (or trough to trough): This is the wavelength.
5. Vertical distance from equilibrium to crest (or trough): This is the amplitude.
6. The repeated up-and-down motion: This is an oscillation.

Now, let’s assign the labels to the boxes on the diagram:

- Top box (horizontal arrow across one full wave cycle) → wavelength
- Right vertical arrow (from equilibrium to crest) → amplitude
- Left box (dashed line) → equilibrium line
- Bottom right (lowest point of wave) → trough

So the labeled diagram should have:
- Top: wavelength
- Right: amplitude
- Left: equilibrium line
- Bottom right: trough

(Also note: "crest" or "peak" would go at the top of the wave, but there's no box for that; it's implied.)

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Step 2: Complete the Definitions

Now fill in the blanks below the diagram:

1. ______ - the top of a wave
→ crest or peak
(Both are acceptable; we'll use crest as it's more commonly used in physics.)

2. ______ - the bottom of a wave
→ trough

3. ______ - the level if the wave flattened out
→ equilibrium line

4. ______ - a repeated action back and forth or up and down
→ oscillation

5. ______ - the number of waves that pass every second (measured in ______)
→ frequency – measured in Hertz

6. ______ - the time it takes for one complete wave to pass (measured in ______)
→ period – measured in seconds

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✔ Final Answer:

#### Diagram Labels:
- Top horizontal arrow: wavelength
- Vertical arrow (height): amplitude
- Dashed line: equilibrium line
- Bottom low point: trough

#### Definitions:
1. crest – the top of a wave
2. trough – the bottom of a wave
3. equilibrium line – the level if the wave flattened out
4. oscillation – a repeated action back and forth or up and down
5. frequency – the number of waves that pass every second (measured in Hertz)
6. period – the time it takes for one complete wave to pass (measured in seconds)

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Words Used:

- crest ✔
- trough ✔
- equilibrium line ✔
- oscillation ✔
- frequency ✔
- Hertz ✔
- period ✔
- seconds ✔
- wavelength ✔
- amplitude ✔

Unused words: peak, dip, metres

Note: "peak" is synonymous with "crest", so it could be used interchangeably, but "crest" is standard. "Dip" is not a standard wave term. "Metres" might be used for units of wavelength/amplitude, but not needed here since only the terms were requested.

✔ All required parts completed!