Wave Properties and Energy Sources

Mrs. Rabab introduces the lesson on mechanical waves, focusing on their properties and types. The lesson covers the definition of waves, emphasizing that they transfer energy without moving matter. Mechanical waves require a medium to travel and are categorized into transverse and longitudinal waves. The video explains transverse waves in detail, using examples like a moving rope to illustrate concepts such as crest, trough, and vibration.

What is the primary function of a wave?

• To transfer matter

• To transfer energy

• To change direction

• To create sound

Which of the following can be an energy source for waves?

• A vacuum

• A shadow

• A stationary object

• A raindrop

What is required for a mechanical wave to travel?

• A high temperature

• A medium

• A low pressure

• A vacuum

Which type of wave moves perpendicular to the direction of travel?

• Electromagnetic wave

• Surface wave

• Transverse wave

• Longitudinal wave

What is an example of a transverse wave?

• Sound wave

• Light wave

• Movement of a flag

• Seismic wave

What is the term for the highest point of a wave?

• Frequency

• Crest

• Trough

• Amplitude

What is the term for the lowest point of a wave?

• Crest

• Wavelength

• Amplitude

• Trough

What does one complete vibration of a wave include?

• Two troughs

• Two crests

• One crest and one trough

• One crest and one amplitude

What happens to the wave when the source of energy stops?

• The wave increases in amplitude

• The wave changes direction

• The wave stops being produced

• The wave continues indefinitely

What is the role of hand movement in creating a wave pattern?

• It changes the wave's frequency

• It stops the wave

• It creates a vacuum

• It acts as the energy source