What type of wave is sound?
Longitudinal
Electromagnetic
Transverse
Through which of the following can sound not travel?
Air
A vacuum
Solids
What is the approximate speed of sound in air?
330 m/s
1,500 m/s
300 million m/s
What is an area of low pressure in a wave called?
Compression
Equilibrium
Rarefaction
What is the range of normal human hearing?
2 Hz to 2,000 Hz
20 Hz to 2,000 Hz
20 Hz to 20,000 Hz
What is ultrasound?
Sound waves above the range of human hearing
Sound waves within the range of human hearing
Sound waves below the range of human hearing
Which of these is not a use of ultrasound?
Internal body scans
Measuring the size of earthquakes
Cleaning jewellery
Which method is used to detect objects underwater?
Ultrasound scans
Echo sounding
Seismic waves
Which seismic waves are transverse waves?
P-waves only
S-waves only
P-waves and S-waves
Which seismic waves can travel through the Earth's core?