Watersheds and Pollution2

Most of the water on Earth is found in _________________.

• glaciers
• lakes
• rivers
• oceans

Salinity is the amount of _________________ found in water.

• salt
• calcium
• oxygen
• hydrogen

An aquifer must contain a permeable layer of rock, sand, or soil. Which is true about a permeable rock layer?

• It contains little pore space
• There are pores, but they aren't connected
• There are pores, and they are connected
• The water cannot move freely

When trash is dumped into the water ways, it mixes physically with the water. What type of pollution is this?

• agricultural
• chemical
• surface 
• thermal

The type of pollution where the temperature levels rise causing a decrease in dissolved oxygen is called _______________ pollution.

• agricultural
• chemical
• surface 
• thermal

When pollutants are introduced into the environment over a large area, it is called __________________.

• point source pollution
• non-point source pollution

Which type of water is more easily to polluted?

• surface water

• groundwater

• frozen water

• evaporated water

An oil tanker hits a reef and causes an oil spill. Is this point source or non-point source pollution?

• point source pollution
• non-point source pollution

A car was leaking oil on the road. Is this point source or non-point source pollution?

• point source pollution
• non-point source pollution

A paper mill dumps waste into a nearby stream. Is this point source or non-point source pollution?

• point source pollution
• non-point source pollution