EOG Drills: Earth Systems:

Which will most likely result if there is increased upwelling in a coastal area?

• more aquatic life 
• less nutrients in the water 
• higher water temperatures 
• fewer nitrate

Which best determines the health of a lake used as a source of freshwater?

• its depth and width 
• its temperature and pH 
• its location and depth 
• its temperature and depth 

Why is water from an aquifer more likely to be cleaner than water from other sources?

• because it forms where fresh and salt water meet 
• because it receives water directly from precipitation 
• because it rises to the surface near the ocean 
• because pollutants are filtered by rock and soil deep within Earth 

If a body of water has high turbidity levels, what can mostly be concluded?

• It has a low pH. 
• It is unsafe to drink. 
• It is too hot to drink. 
• It contains a lot of chemicals. 

In which oceanic zone do clams and crabs survive by burrowing into the sand?

• oceanic 
•  inter-tidal 
• deep ocean
• open ocean

Which best describes the characteristics of a river basin?

• the land drained by a river and its tributaries
• the land formed when rivers create estuaries and marshes 
• the land at the mouth of a river where water flows into the ocean 
• the land formed as a result of a river flooding 

Which factors can have the effect on the health of a river system?

• type of soil and salinity 
• nitrate levels and turbidity 
• human consumption and pH 
• natural disasters and tidal changes 

In the United States, which is responsible for ensuring the safety of the country’s drinking water?

• Environmental Protection Agency (EPA) 
• Food and Drug Administration (FDA) 
• National Oceanic and Atmospheric Administration (NOAA) 
• Center for Disease Control (CDC) 

Which source of water pollution includes oil and gasoline discharge from automobiles and storm sewer drainage?

• agriculture      
• bacteria 
• sedimentation 
• urban runoff 

Which of the following scientific terms best explains the reaction of solid 3?

• solubility

• cohesion

• polarity

• buoyancy