using resources

Question 1

resources are needed for:

Answer 1

warmth
shelter
food
transport

Question 2

some natural resources include

Answer 2

food
wood
fuels
materials

Question 3

use of fuels

Answer 3

burning, energy

Question 4

sustainability

Answer 4

using natural materials in a way that does not compromise future generations’ ability to do the same

Question 5

potable

Answer 5

water that is safe to drink

Question 6

process of getting potable water

Answer 6

taking water from fresh source

it is then filtered to remove large insoluble particles

sterilised using chlorine, ozone or uv

Question 7

desaliation

Answer 7

removal of salf from sea water by distillation or reverse osmosis

Question 8

disadvantage of desalination

Answer 8

requires a lot of energy

Question 9

treating waste water

Answer 9

1)screening/grit removal
sedimentation

liquid effluent: aerobic treatment
sludge(solid) treated by anaerobic digestion

Question 10

we obtain metals from__________

Answer 10

ores

Question 11

how do we get pure metal

Answer 11

through electrolysis or displacement reaction

Question 12

phytomining

Answer 12

plants absorb copper ions into their roots
burn then obtain copper from ash

Question 13

bioleaching

Answer 13

bacterial produce leachate solutions that contain copper ions that can be extracted

Question 14

a disadvantage of phytomining and bioleaching

Answer 14

very low yield

Question 15

life cycle assesment

Answer 15

this is carried out to predict the impact of a new product on the environment

Question 16

what to consider when a life cycle assessment is done

Answer 16

extraction and processing of raw materials

manufacturing and packaging

use over its lifetime

disposal

transportation

Question 17

reduce impact by

Answer 17

using less products
reducing materials and energy needed to make recycling

Question 18

Agricultural waste water requires the removal of harmful

Answer 18

Bacteria/microbes

Question 19

How is crude oil formed

Answer 19

When planktons die
Buried in rock (sediments)
Over a long time

Question 20

Describe how crude oil is separated into fractions by fractionating column (4 makrs)

Answer 20

Crude oil is heated
Hydrocarbons evaporate
At every fraction a hydrocarbon is collected depending on boiling point

Question 21

1 way to reduce carbon emmisions

Answer 21

Recycling plastic

Question 22

Advantage and disadvantage of using a larger volume

Answer 22

More accurate results

Takes a longer time to heat up