Exploring Longitudinal Waves in Grade 7 Science

This video tutorial explores longitudinal waves, demonstrating their properties using a spring. It explains how energy is transferred through compressions and rarefactions, and discusses how to measure wavelength and frequency. Sound waves are highlighted as a practical example of longitudinal waves. The lesson concludes with guidance on further learning resources.

What type of wave is demonstrated by pushing and pulling a spring along its length?

• Transverse wave

• Electromagnetic wave

• Longitudinal wave

• Surface wave

In a longitudinal wave, what are the regions where the coils of the spring are closely packed together called?

• Troughs

• Nodes

• Crests

• Compressions

In a longitudinal wave, what are the regions where the coils of the spring are stretched apart called?

• Troughs

• Rarefactions

• Crests

• Compressions

What type of energy do the coils of the spring possess when they move from their rest position?

• Thermal energy

• Kinetic energy

• Gravitational potential energy

• Nuclear energy

How is the wavelength of a longitudinal wave measured?

• From trough to trough

• From one compression to the next compression

• From crest to crest

• From one node to the next node

Tags

NGSS.HS-PS4-1

What is the time taken for one complete wave to pass a certain point called?

• Amplitude

• Wavelength

• Frequency

• Period

Which type of wave requires a medium to propagate and cannot travel in a vacuum?

• Transverse wave

• Electromagnetic wave

• Surface wave

• Sound wave

What property of sound waves explains why you can hear people even when you can't see them?

• Diffraction

• Refraction

• Reflection

• Absorption

What determines the loudness of a sound wave?

• Frequency

• Wavelength

• Amplitude

• Speed

What is the distance between two successive points in phase in a wave called?

• Amplitude

• Period

• Frequency

• Wavelength

Tags

NGSS.HS-PS4-1