Hydrosphere

Front

How much of Earth's water is unavailable for humans to consume due to its high salinity?

Back

97%

Front

How does the amount of water circulating in the water cycle change?

Back

The amount of water remains constant.

Front

Which statement best describes how estuaries are positive environment for animals and plants?

Back

They provide a safe hatchery full of nutrients and food.

Front

How does mining on the ocean floor negatively affect the surrounding ecosystems?

Back

High turbidity clog the gills of ocean organisms

Front

How does turbidity describe a water system's health?

Back

Less turbid water contains less suspended solids than gases

Front

Which statement best describes why an algae bloom forms? Options: Decreased amounts of fish eating on the algae, Decrease of pollution allow algae absorb gases and grow fast, High amount of light stimulate photosynthesis to occur, High amounts of fertilizer from farms/ fast growth of algae

Back

High amounts of fertilizer from farms/ fast growth of algae

Front

Why is such a small amount of freshwater available for humans to readily use?

Back

Most of fresh water is frozen in glaciers and polar ice caps

Front

All the water on, in, and surrounding the earth

Back

Hydrosphere

Front

Which best explains the distribution of freshwater on Earth?

Back

Most is unavailable for use since it is frozen in polar ice caps.

Front

How does upwelling provide the needed materials to support life forms?

Back

Upwelling brings nutrients from the ocean floor to organisms at the ocean surface.