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Ocean currents — the continuous, directed movement of ocean water — affect regional climates and alter the biological and chemical characteristics of seawater. Currents can flow for long distances both at and below the ocean’s surface. Wind drives surface currents, whereas density often drives...
Grade Level   6 7 8
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2
What is sea ice? It is simply frozen ocean water. Why is sea ice important? While it occurs mainly in polar regions, sea ice influences our global climate. Changing amounts of sea ice can affect ocean circulations, weather patterns, and temperatures around the world. Sea ice insulates the relatively...
Grade Level   6 7 8 9 10
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3
NASA’s Gravity and Climate Experiment (GRACE) is a mission to track the impact of climate change on the planet’s vast stores of freshwater, saltwater, and ice. A pair of satellites, GRACE effectively “weighs” Earth’s shifting water resources month by month to detect where water is...
Grade Level   5 6 7 8
Classroom Activities Curricula and Instruction
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