Vocabulary A
A system that tells scientists their exact location.
GPS (Global Positioning System)
A floating instrument that moves with ocean currents while collecting data.
Drifter
What years did the HMS Challenger go on its expedition and exploration.
1872-1876
The amount of dissolved salt in seawater.
What is salinity?
An underwater vehicle controlled from a ship.
ROV
A floating instrument used to collect ocean or weather data.
Buoy
Using technology to allow scientists to participate in an ocean expedition from far away in real time. (Ocean Zoom)
Telepresence
What year did scientists discover hydrothermal vents?
1977
An instrument that measures conductivity, temperature, and depth.
CTD
Small aircraft used to collect information and images of coastal areas, reefs, and habitats.
Drones
An instrument that listens to sounds underwater.
Hydrophone
An instrument that uses sound and the Doppler effect to measure water-current speed and direction.
ADCP (Acoustic Doppler Current Profiler)
What year did Trieste reach the Challenger Deep?
1960
She mapped the Mid-Atlantic Ridge and helped reveal the rift valley.
Marie Tharp
A cylinder of seafloor sediment collected for scientific study.
Sediment Core
An underwater vehicle programmed to explore on its own.
AUV (Autonomous Underwater Vehicle)
A system that combines maps with layers of data.
GIS (Geographic Information System)
What year did the Glomar Challenger collect seafloor cores?
1968
Used to collect marine specimens out of the water column using nets towed behind a research vessel
Trawl
An instrument that measures conductivity, temperature, and depth.
CTD