Gr.7 C2 T8 L1 Wave Properties

What is a wave?

• A movement of particles.

• A disturbance that transfers energy from place to place.

• A transfer of matter across a medium.

• A type of vibration that stays in one place.

What type of wave requires a medium to travel?

• Electromagnetic wave

• Mechanical wave

• Radio wave

• X-ray

Wave motion that is parallel to wave direction describes ............................................a wave.

• longitudinal

• transverse

• surface

• electromagnetic

Frequency is measured in units called....................

• hertz

• decibles

• m/s

• joules

What are compressions in a longitudinal wave?

• The spread-out parts of the wave

• The closest-packed parts of the wave

• The high points of the wave

•  The points of zero amplitude

How do waves with higher amplitude compare in energy?

• Their energy is constant.

• Energy depends on wavelength, not amplitude.

• They have less energy.

• They have more energy.

What happens to wave speed when frequency increases and wavelength stays constant?

• It increases.

• It decreases.

•  It stays the same.

• It becomes zero.

What is the movement of particles in a surface wave?

• Up and down

• Back and forth

•  Circular

• Side to side

Electromagnetic waves require a medium to travel.

• True

• False

What does wave energy depend on?

• Speed and wavelength

• Frequency and wavelength

•  Amplitude and frequency

• Amplitude and speed