Sound waves worksheet featuring wave diagrams and a labeled diagram of sound wave properties.

Let's solve this step-by-step.

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Part 1: Match the sound wave with its proper name

We are given four sound wave diagrams (A, B, C, D), each lasting 1 second. We need to match them with the correct descriptions based on amplitude (related to loudness) and frequency (related to pitch).

#### Key Concepts:
- Amplitude: The height of the wave from the rest position. Higher amplitude = louder sound.
- Frequency: How many waves occur in a second (measured in Hz). More waves in 1 second = higher pitch.
- Wavelength: Distance between two consecutive crests or troughs. Shorter wavelength = higher frequency = higher pitch.

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#### Analyze Each Wave:

A.
- Moderate amplitude
- 3 cycles in 1 second → medium frequency
- So: Moderate loudness, medium pitch
- But among options, closest is Soft sound, High Pitch? Wait — let's compare all.

Wait — let’s check all carefully:

A:
- Amplitude: small (low)
- Frequency: about 3 waves in 1 sec → high frequency
→ Soft sound, High Pitch

✔ So A → Soft sound, High Pitch

B:
- Amplitude: large
- Frequency: about 2 waves in 1 sec → low frequency
→ Loud sound, Low Pitch

✔ So B → Loud Sound, Low Pitch

C:
- Amplitude: large
- Frequency: about 5–6 waves in 1 sec → high frequency
→ Loud sound, High Pitch

✔ So C → Loud Sound, High Pitch

D:
- Amplitude: small
- Frequency: about 2 waves in 1 sec → low frequency
→ Soft sound, Low Pitch

✔ So D → Soft sound, Low Pitch

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Now match the letters to the boxes:

| Letter | Description |
|--------|---------------------------|
| A | Soft sound, High Pitch |
| B | Loud Sound, Low Pitch |
| C | Loud Sound, High Pitch |
| D | Soft sound, Low Pitch |

So fill in the boxes:

- A → Soft sound, High Pitch
- B → Loud Sound, Low Pitch
- C → Loud Sound, High Pitch
- D → Soft sound, Low Pitch

> ✔ Final Answers:
> - A: SOFT SOUND, HIGH PITCH
> - B: LOUD SOUND, LOW PITCH
> - C: LOUD SOUND, HIGH PITCH
> - D: SOFT SOUND, LOW PITCH

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Part 2: Label the Diagram

We have a tuning fork producing sound waves. Words to use:
- sound
- amplitude
- through
- wavelength
- crest
- vibration

Let’s label the diagram:

1. Tuning fork vibrating → This is vibration (produces the sound).
2. The arrow pointing up from the fork → indicates vibration
3. The wave moving outward → labeled as sound
4. The highest point of the wave → crest
5. The lowest point of the wave → trough
6. The vertical distance from rest line to crest → amplitude
7. The horizontal distance between two crests → wavelength

Now, assign labels to the blanks in the diagram:

Assuming the diagram has:

- One arrow pointing upward from the tuning fork → vibration
- Arrow pointing from fork to wave → sound
- Vertical arrow from centerline to crest → amplitude
- Horizontal arrow across one full wave → wavelength
- Top of wave → crest
- Bottom of wave → trough

So:

- Label 1 (upward arrow from fork) → vibration
- Label 2 (arrow from fork to wave) → sound
- Label 3 (vertical line from center to crest) → amplitude
- Label 4 (top of wave) → crest
- Label 5 (bottom of wave) → trough
- Label 6 (horizontal span between two crests) → wavelength

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✔ Final Answer Summary:

#### Matching Section:

| Letter | Box Answer |
|--------|------------|
| A | SOFT SOUND, HIGH PITCH |
| B | LOUD SOUND, LOW PITCH |
| C | LOUD SOUND, HIGH PITCH |
| D | SOFT SOUND, LOW PITCH |

#### Diagram Labels:

From top to bottom/left to right:

1. vibration (upward arrow from fork)
2. sound (arrow from fork to wave)
3. amplitude (vertical line from center to crest)
4. crest (top of wave)
5. trough (bottom of wave)
6. wavelength (horizontal line between two crests)

> 🔍 Tip: Remember:
> - High pitch = more waves per second (high frequency)
> - Loud sound = bigger amplitude
> - Vibration creates sound
> - Amplitude = height of wave
> - Wavelength = distance between crests
> - Crest = peak, trough = valley

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Let me know if you'd like this as a printable answer key!