📊 Part 1: Wave Properties and Calculations

1. A sound wave has a frequency of 440 Hz and travels at 343 m/s. Calculate its wavelength using v = f × λ.

2. Which of the following best describes wavelength?

The height of a wave from rest position

The distance between two consecutive crests

The number of waves per second

The time for one complete wave cycle

3. A radio wave has a wavelength of 3 metres and frequency of 100 MHz (100,000,000 Hz). What is its speed?

4. Fill in the blanks using the correct wave terms:

The _____________ of a wave is measured in Hertz (Hz), while the _____________ is the maximum displacement from the rest position. The distance a wave travels per second is called the wave _____________.

🔬 Part 2: Wave Behaviours

5. Match each wave behaviour with its correct description by drawing lines:

Reflection

Refraction

Diffraction

Interference

Waves bending around obstacles

Waves bouncing off surfaces

Two waves overlapping

Waves bending when changing medium

6. Which wave behaviours would you observe in these New Zealand contexts? (Check all that apply)

Earthquake waves travelling through different rock layers:

Reflection

Refraction

Diffraction

7. Explain how wave reflection is important for ultrasound technology used in New Zealand hospitals:

🌊 Part 3: Investigation Analysis

8. During your practical investigation, you observed that when frequency increased, wavelength decreased. Explain why this relationship exists using the wave equation v = f × λ:

9. Draw a simple diagram showing constructive interference (when two waves combine to make a larger wave):

10. Research Task: Choose one wave technology used in New Zealand (radio, Wi-Fi, seismic monitoring, etc.) and explain how wave properties make it work:

Technology chosen: _________________________