Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry 2 > Using the Earth’s resources and obtaining potable water > Flashcards

Using the Earth’s resources and obtaining potable water Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

Why do we need earth’s resources (4)

A
  • Warmth
  • Shelter
  • Food
  • Transport
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What do natural resources provide? (4)

A
  • Food
  • Timber
  • Clothing
  • Fuels
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Define ‘renewable energy resource’

A

sources of power that quickly replenish themselves and can be used again

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is potable water?

A

Water that is safe to drink

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

True or false - “Potable water is pure water”

A

False - It contains dissolved substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Why is rain a good source of fresh water?

A

Low levels of dissolved substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where does rain collect?

A
  • Ground
  • Rivers
  • Lakes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

First stage of water treatment

A

Water passed through filter beds to remove different sized insoluble solids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Second stage of water treatment

A

Water is sterilised to kill microbes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

State 3 Sterilising agents

A
  • O zone
  • UV
  • Chlorine
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What needs to happen if only salty water is available?

A

Desalination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

State 2 ways desalination can be done

A

Distillation, processes with membranes (reverse osmosis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the drawbacks of desalination methods?

A
  • Very expensive

- Requires a lot of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

First Stage of Waste Water Treatment

A

Water passed through mesh screen to remove large bits, e.g twigs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Second Stage of Waste Water Treatment

A

Chemicals are added to make microbes stick together to form sediment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Third Stage of Waste Water Treatment

A

Anaerobic digestion of sewage sludge

17
Q

Fourth Stage of Waste Water Treatment

A

Water sterilised with chlorine to kill microbes

18
Q

Why are groundwater and wastewater good ways to obtain potable water?

A

Cheaper and easier than salt water

19
Q

Why can salt water be better that ground/waste water?

A

Plentiful raw material

20
Q

Which countries get potable water from the sea?

A

Those with little fresh water

21
Q

Earth’s resources of —- are —–

A

Metal ores, limited

22
Q

What are two ways of extracting copper from low grade ores?

A

Phytomining, bioleaching

Chemistry 2 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions