Groundwater and fresh water supplies
Grade 9 Science Worksheet - Building Confidence
Circle the best answer.
How is groundwater stored in an aquifer, by Bo's reading (USGS)?
- In giant open caverns under each place
- In wide underground rivers
- In pores and cracks between rock grains
- Above the water table
Where must a well reach to supply water, by Kira's reading (USGS)?
- Into an underground river
- Just into the unsaturated zone
- Down to the first layer of soil
- Below the water table
What is porosity, by Jun's reading (USGS)?
- The amount of open space in rock or soil
- How easily water flows through the open spaces
- How much salt the water holds
- How deep the rock lies
What is permeability, by Luz's reading (USGS)?
Use the picture in question 3.
- The temperature of the water
- The total amount of open space in the rock or soil
- How easily water moves through the spaces
- The color of the rock
USGS: groundwater moves very slowly through clay and shale. What does that show about them, by Milo's reading?
Use the picture in question 3.
- They have high permeability
- They have low permeability
- They hold zero water
- They lie above the water table
Read this first
A storage bar
Recharge in, pumping out.
Where does an aquifer's new water (recharge) come from, by Noah's reading (USGS)?
- Water made deep in the mantle
- Underground rivers that carry water from the poles
- Ocean water pushed inland
- Precipitation soaking into the ground
What happens if water is pumped out faster than it is recharged, by Pia's reading (USGS)?
- The aquifer refills at once
- The water table rises
- Nothing changes
- The water table drops
USGS compares stored groundwater to a supply that is added to and drawn from. Which draws it down, by Ren's reading?
- Snowmelt seeping into the soil
- Water filling the pores
- Pumping water out
- Rain soaking in
Use this
Table, Where is Earth's water? (USGS), with columns Store, Percent of total water, Percent of freshwater: oceans, seas and bays, 96.54%, not fresh; ice caps, glaciers and permanent snow, 1.74%, 68.7%; fresh groundwater, 0.76%, 30.1%; fresh lakes, 0.007%, 0.26%; rivers, 0.0002%, 0.006%.
Where is most of Earth's fresh water, by Zee's reading (USGS)?
- In the air as vapor
- In rivers and lakes
- In groundwater
- In ice caps, glaciers and permanent snow
About what share of fresh water is groundwater, by Esme's reading (USGS)?
- About 30%
- About 97%
- About 69%
- About 1%