Water on Earth- Fifth Grade

What are large bodies of water that separate the continents?

• Seas

• Lakes

• Glaciers

• Oceans

What is the main difference between Photic zone and Aphotic zone?

• Aphotic zone receives very little light, while Photic zone receives a lot of light.

• Aphotic zone receives a lot of light, while Photic zone receives very little light.

• The algae in Aphotic zone can photosynthesize, while those in Photic zone cannot.

• Many Animals live in Aphotic zone, while few live in Photic zone.

What is a characteristic of most lakes?

• They contain salt water.

• They contain fresh water.

• They contain deep water.

• They contain shallow water.

In which zone of a lake can plants perform photosynthesis?

• The photic zone.

• The littoral zone.

• The profundal zone.

• The limnetic zone.

How are lakes and oceans different?

• Lakes are freshwater reserves, and oceans contain a lot of dissolved salt minerals.

• Lakes are saltwater reserves, and oceans contain few dissolved salt minerals.

• Lakes are freshwater reserves, and oceans contain few dissolved salt minerals.

• Lakes are saltwater reserves, and oceans contain a lot of dissolved salt minerals.

What is a principal difference between fresh water and salt water?

• Their physical states.

• Where they are located.

• The diversity of animals in each.

• The amount of each found on the planet.

Which statement is true?

• All lakes contain fresh water.

• Objects float more easily in salt water.

• Objects do not float in fresh water.

• The Red Sea is part of the Pacific Ocean.

What human activities cause water pollution?

• Solar energy production and domestic, livestock and forestry activities.

• Solar energy production and mining, livestock and agricultural activities.

• Hydroelectric energy production and domestic, industrial and agricultural activities.

• Domestic, industrial, livestock and agricultural activities.

Which stages of water cycle are correct?

• Evaporation, raining, floating and infiltration.

• Transpiration, water, sun, condesation and oceans.

• Evaporation, Condensation, Infiltration and Transpiration.

• Infiltration, condensation, floods and droughts.

Why taking care of fresh water is so important?

• Because the amount of fresh water is the same as the amount of salt water.

• Because the amount of salt water is the same as the amount of fresh water.

• Because there is more fresh water than salt water.

• Because there is less fresh water than salt water.