What is sound?

• It is a pressure wave that is created by a vibrating object

• It is when hearing explosion

• It is receiving information from a ping

• it is movement of wave from one point to another

Can we hear sound in a vacuum?

• Yes

• No

• Maybe

The wave that oscillates parallel to the wave direction with compress and expanse motion?

• Longitudinal wave

• Transverse wave

• Sinusoidal wave

• Micro wave

What is Echolocation?

• The location of objects by reflected sound

• The location of sound source

• The sound of location interest

• The detection of sound in cave

What is Echo?

• It is the reflection of the sound waves

• It is the propagation of the sound wave

• It is the ultraviolet radiation reflection

• It is a sound made by transmitter

What is the speed of sound in seawater?

• 1500 m/s

• 343 m/s

• 5300 m/s

• 747 m/s

Why can't we see clearly underwater?

• Lower levels of illumination

• Canceling focus by water

• Salinity Properties

• Light rays are hardly bent

How sound is made?

• From vibration that disturbs the surround molecules

• Ultrasonic transmission from transmitter

• The ossicles detection pass into the inner ear

• The ability to perceive sounds by detecting vibrations

What is another term used for seafloor mapping?

• Bathymetry

• Telemetry

• Biography

• Oceanography

How animal hunts in the dark, without using their eyes?

• Echolocation

• Echoranging

• Reflection

• Ultrasound