Science 7 Dogsled Race Pre-test

Front

What is salinity?

Back

Salinity is the measure of the amount of salt dissolved in water, typically expressed in parts per thousand (ppt).

Front

What causes a decrease in ocean salinity?

Back

A decrease in ocean salinity can occur due to the melting of glaciers and ice sheets, which adds fresh water to the oceans.

Front

What is a cold-water current?

Back

A cold-water current is a flow of water that is colder than the surrounding water, often originating from polar regions.

Front

How does ocean water circulation affect climate?

Back

Ocean water circulation helps regulate climate by distributing heat around the planet, influencing weather patterns and temperatures.

Front

What is global warming?

Back

Global warming refers to the long-term increase in Earth's average surface temperature due to human activities, primarily the burning of fossil fuels.

Front

What happens to glaciers as global temperatures rise?

Back

As global temperatures rise, glaciers melt at a faster rate, contributing to rising sea levels and potential flooding in coastal areas.

Front

What is a density current?

Back

A density current is a flow of water that occurs due to differences in water density, often caused by variations in temperature and salinity.

Front

Why does saltier water sink?

Back

Saltier water is denser than fresh water, causing it to sink to the bottom of the ocean, which can drive currents.

Front

What role do winds play in ocean currents?

Back

Winds drive surface ocean currents by exerting force on the water, influencing their direction and speed.

Front

What is the impact of melting glaciers on sea levels?

Back

Melting glaciers contribute to rising sea levels, which can lead to flooding in coastal regions.