Listening to Earth

By listneing to the ocean around divergent plate boundaries, Dziak and his team can detect _____ and _______ that humans wouldn't know about in any other way.

• mid ocean ridges, volcanic activity

• earthquakes, trenches

• mid ocean ridges, trenches

• earthquakes, volcanic activity

Tags

NGSS.MS-ESS3-2

Sound travels easily into the deepest parts of the trench if the source is (a)   .

• Directly over the trench

• Far from the trench

• Near the surface

• In the air

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What is the purpose of lowering a hydrophone into the ocean?

• To record sound

• To measure temperature

• To track fish

• To study ocean currents.

What tool does Bob Dziak use to study the sounds of the ocean floor?

• • Sonar

• • Seismograph

• • Hydrophone

• • Radar

Tags

NGSS.MS-PS4-2

Why did Dziak and his team use hydrophones?

• • To map the ocean floor

• • To record sounds from plate movement and earthquakes

• • To track marine life

• • To measure water temperature

What helps scientists study earthquakes at mid-ocean ridges?

• • Satellites

• • Robots

• • Hydrophones

• • Buoys

Tags

NGSS.MS-ESS2-3

Why are hydrophones placed in deep ocean locations like Challenger Deep?

• • To measure water pressure

• • To capture sounds from seismic activities and plate movements

• • To study deep-sea organisms

• • To track underwater currents

Tags

NGSS.MS-ESS3-2

NGSS.MS-PS4-2

True or False: Hydrophones are used to record sounds from the movement of tectonic plates.

• True

• False

Tags

NGSS.MS-ESS3-2

By listening to the Earth's vibrations, scientists can detect _______ and _______ that are otherwise undetectable.

• earthquakes, volcanic eruptions

• tornadoes, hurricanes

• tsunamis, landslides

• avalanches, floods

Tags

NGSS.MS-ESS3-2

What instrument is primarily used to listen to the Earth's vibrations underwater?

• Sonar

• Seismograph

• Hydrophone

• Radar