5th: br-Conductivity, Temperature, Depth (CTD) Sensors

What does CTD stand for in oceanographic research?

• Current, Time, Density

• Conductivity, Time, Depth

• Current, Temperature, Density

• Conductivity, Temperature, Depth

What is the primary purpose of a CTD sensor?

• To measure ocean currents

• To determine essential physical properties of sea water

• To track marine life

• To map the ocean floor

Tags

NGSS.MS-PS1-2

How is data from a shipboard CTD typically transmitted to scientists?

• Using radio waves

• Through a conducting cable

• By manual retrieval

• Via satellite

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NGSS.HS-PS4-5

Which of the following is an advantage of CTD sensors?

• They are only used at shallow depths

• They require no calibration

• They are very heavy

• They provide remote sensing capabilities

What is a limitation of small, low-powered CTD sensors on autonomous instruments?

• They are not accurate

• They cannot be used in deep water

• They require frequent calibration

• They are too light

What additional instrument can be attached to a CTD package to measure horizontal velocity?

• Niskin bottle

• Acoustic Doppler Current Profiler (ADCP)

• Oxygen sensor

• Marine magnetometer

What is the role of Niskin bottles in a CTD package?

• To map the ocean floor

• To record sound waves

• To collect water samples at different depths

• To measure temperature

Tags

NGSS.MS-ESS2-4

Why is it important to calibrate CTD sensors on autonomous instruments?

• To ensure they are waterproof

• To increase their weight

• To make them faster

• To maintain sensor stability over long deployments

What is a potential danger of relying solely on autonomous CTD sensors?

• They require too much power

• They might miss real changes in the ocean

• They are too expensive

• They are too complex to operate

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NGSS.HS-ETS1-3

Which publication is mentioned as a source for CTD information?

• Marine Technology Review

• Oceanographic Studies Quarterly

• Encyclopedia of Ocean Sciences

• Journal of Marine Biology