Question 1 of 6
Basic

Which conditions give water the best cleaning effect on the way to becoming groundwater?

Question 2 of 6
Basic

What do we call the water-bearing layer underground?

Question 3 of 6
Basic

When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?

Question 4 of 6
Basic

In the example given in the course, how many years will it take potentially for the effects of surface pollution to show up in drinking water?

Question 5 of 6
Basic

How is a rising sea level a problem for coastal communities?

Question 6 of 6
Basic

Initially, water is driven underground by gravity. What is the main driver after a certain depth?

Question 6 of 6
Basic

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1: Which conditions give water the best cleaning effect on the way to becoming groundwater?
Fast travel time through the subsurface
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1: Which conditions give water the best cleaning effect on the way to becoming groundwater?
Slow travel time through the subsurface
1: Which conditions give water the best cleaning effect on the way to becoming groundwater?
There is no cleaning effect through the subsurface
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2: What do we call the water-bearing layer underground?
An aquifer
2: What do we call the water-bearing layer underground?
A water tank
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2: What do we call the water-bearing layer underground?
A well
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3: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
Pollutants in the water
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3: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
Nothing - this process happens on the surface
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3: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
Pure water and CO2
4: In the example given in the course, how many years will it take potentially for the effects of surface pollution to show up in drinking water?
4 to 5 years
4: In the example given in the course, how many years will it take potentially for the effects of surface pollution to show up in drinking water?
Over a thousand years
4: In the example given in the course, how many years will it take potentially for the effects of surface pollution to show up in drinking water?
40 to 50 years
5: How is a rising sea level a problem for coastal communities?
Because of saltwater intrusion into the coastal aquifers
5: How is a rising sea level a problem for coastal communities?
It isn't - as long as the aquifer is healthy, there will always be enough pressure to hold back the seawater
5: How is a rising sea level a problem for coastal communities?
It is actually a positive, because there will be greater pressure in wells further inland
6: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
The main driver becomes pressure
6: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
The main driver is still gravity
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6: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
Both pressure and gravity, depending on conditions
You can find the answer here >