C10 using resources

Question 1

what four things do humans use the earth’s resources for

Answer 1

shelter, food, warmth, transport

Question 2

what four things do natural resources provide

Answer 2

food, timber, clothing, fuels

Question 3

what two things does chemistry play an important role in

Answer 3

improving agricultural and industrial processes

Question 4

what is peat

Answer 4

partly decomposed plant matter found in bogs

Question 5

give three examples of finite resources

Answer 5

fossil fuels, peat, uranium

Question 6

define sustainable development

Answer 6

“devlopment that meets the needs of the current generation without comprimising the
ability of future generations to meet their own needs”

Question 7

what can finite resources be suplemented by

Answer 7

synthetic or agricultural products

Question 8

give an example of how the finite resource of fossil fuels can be replaced sustainably

Answer 8

using biofuels made from organic matter

Question 9

what does potable water mean

Answer 9

water that is safe to drink

Question 10

what should drinking water have low levels of for humans

Answer 10

salts and microbes

Question 11

what is the difference between potable and pure water

Answer 11

potable water contains disolved substances where pure water is just h20

Question 12

how do we mainly collect our water in the UK

Answer 12

through rain water that collects in lakes and river

Question 13

what does sterilisation do

Answer 13

kill bacteria

Question 14

what is a filter bed

Answer 14

a tank or a pond containing a layer of sand or gravel for filtering

Question 15

describe the process of producing potable water

Answer 15

gather water from fresh source, pass it though a filter bed and then sterilise it

Question 16

give the three sterilising agents used for making potable water

Answer 16

chlorine, ozone, ultraviolet light

Question 17

what two things means water requires treatment before entering the surroundings

Answer 17

urban lifestyles and industrial processes

Question 18

what two things need to be removed from agricultural waste

Answer 18

organic matter and harmful microbes

Question 19

what are three methods of water treatment

Answer 19

screening, sedimentation and bacterial digestion

Question 20

what is screening

Answer 20

grit removal

Question 21

what is sedimentation

Answer 21

the production of sludge

Question 22

what is used to extract metals from low grade areas

Answer 22

copper ores

Question 23

describe the process of phytomining

Answer 23

planting plants which are then harvested and burned to produce ash containing metal

Question 24

what is leechate

Answer 24

a liquid with suspended solids in it

Question 25

what is the process of bioleeching

Answer 25

using bacteria to feed on nutrients in the minerals

Question 26

what are the 3 alternative metal extraction methods

Answer 26

copper ores. phytomining and bioleeching

Question 27

why is the life cycle assesment carried out

Answer 27

to assess the environmental impact of products

Question 28

what five stages does the LCA look at

Answer 28

extraction, packaging, useage, disposability, transportability

Question 29

what three things can be done to reduce our use of limited resources

Answer 29

reduce, reuse, recycle

Question 30

what two elements are needed for an object to rust

Answer 30

oxygen and water

Question 31

what is a ceramic and what is it used for

Answer 31

non metal solids with high melting points. insulaters and used for glass and bricks

Question 32

what is a composite and what is it used for

Answer 32

"one material embedded in another with different properties. used to get benefits of two materials"

Question 33

what two things can be done to prevent rusting of materials

Answer 33

materials can be greased or painted.

Question 34

describe the haber process

Answer 34

"nitrogen and hydrogen are raw materials extracted from the air and then passed over an iron catalyst at a high temp and pressure. thes then react to produce ammonia amd it is also a reversible reaction. "

Question 35

what is the formula for ammonia

Answer 35

NH3

Question 36

under what conditions does the Haber process take place and why

Answer 36

"high pressure, high temperature. a compromise temp of 450 is reached because cooling the reaction produces a higher pc yield but speeding it up increases the rate of reaction."

Question 37

what three compounds are used in NPK formulas and why

Answer 37

nitrogen, phospherous and potassium because plants need certain ions for healthy growth