8th Grade Hydrosphere

Which contains the greatest amount of freshwater?

• Water Vapor

• Oceans & Seas

• Lakes & Rivers

• Glaciers & Polar Ice Caps

Water covers what percent of Earth's surface?

• 3%

• 50%

• 70%

• 9%

How much of Earth’s water is fresh water?

• 100%

• 70%

• 3%

• 23%

How is water stored in an aquifer?

• in an open underground lake

• in cracks and spaces in rocks

• in impermeable rock

• in wells and springs

To represent the distribution of water on earth, a teacher filled a 2-liter bottle with 2000mL of water. She then made a mark at the 1944 mL point. What should be written at the 1944 mL level to distinguish the type of water to that point?

• Water from glaciers & icebergs

• Ground water

• Ocean water

• Water from ponds, rivers, lakes & streams

Which best explains why all of the Earth’s freshwater is not available for human use?

• Most of Earth's freshwater is only in lakes

• Most of Earth’s freshwater is underground.

• Most of Earth’s freshwater is still in the water cycle.

• Most of Earth’s freshwater is frozen water.

What effect does the water cycle have on the total amount of water on Earth?

• The total amount of water on Earth is constantly increasing.

• The total amount of water on Earth is constantly decreasing.

• The total amount of water on Earth remains relatively constant.

• The total amount of water on Earth changes due to periods of global warming and cooling.

How are estuaries connected to oceanic organisms?

• Estuaries provide a nursery grounds for oceanic organisms

• Estuaries provide sunlight for oceanic organisms.

• Estuaries provide primary food for oceanic organisms.

• Estuaries provide excess dissolved oxygen for oceanic organisms.

Why do plant plankton not grow in the deep ocean?

• because sunlight does not reach the deep ocean

• because too many animals eat it before it can grow

• because there are not enough dissolved gases to support it

• none of the above

Which is the largest zone in the ocean?

• Neritic

• Oceanic

• Intertidal

• Riveric