Env Sci, Chapter 11, Water, Post Assessment

Most of the Earth's water (about 97 percent) is

• salt water in the oceans.
• freshwater in lakes and rivers.
• in the form of snow or ice.
• in the clouds.

When deep wells are heavily pumped, one result can be:

• decreased groundwater recharge
• spring formation
• a cone of depression
• a rise in the water table

Which of the following would NOT help prevent future flooding?

• Building of Dams
• Protecting wetlands
• Protecting Forests
• Expansion of urban areas

Which sector uses the most water?

• agriculture
• industry
• household

A coastal community builds a well and now there water is no longer drinkable. What is the problem?

• Cone of depression
• artesian well
• saltwater intrusion
• groundwater recharge

What is the uppermost level at which the water is a given area fully saturates the rock or soil?

• Aquifers
• Springs
• Water Table
• Groundwater Recharge

Which of the following is not the source of water pollution?

• Litter
• Oil spills
• Smoking
• Runoffs from pesticides

Which best describes the importance of an aquifer?

• It holds uncontaminated ground water for human consumption
• It supplies all the water for lakes and rivers
• It provides water for oceans

Bacteria are beneficial to wastewater treatment because

• they naturally break down organic matter
• they help solid material to settle out of the wastewater
• the nutrients produced are beneficial to the treated water
• they aren't beneficial

what is the main cause of water pollution?

• humans
• animals
• plants 
• invasive species