Exploring the Hydrosphere and Its Components

What does 'hydrosphere' mean in Greek?

• Life

• Water

• Air

• Earth

What percentage of the Earth's surface is covered by water?

• 50%

• 60%

• 70%

• 80%

What is the average salt concentration in ocean water?

• 5%

• 3.5%

• 2.5%

• 1%

What is brackish water?

• Pure freshwater

• Mix of saltwater and freshwater

• Water with low salt concentration

• Water with high salt concentration

Which is the largest lake in the world?

• Lake Michigan

• Lake Victoria

• Caspian Sea

• Lake Superior

What causes waterfalls?

• Change in landscape elevation

• Change in water direction

• Change in water temperature

• Change in water speed

What human activity directly alters the flow of water to oceans?

• Fishing

• Boating

• Swimming

• Building dams

What is the primary force that moves water through the water cycle?

• Gravity

• Temperature

• Sunlight

• Wind