Using Recources

Question 1

What are natural resources used for from the earth ?

Answer 1

Fuel for warmth

Building

Food

Transport

Clothing

Question 2

What does sustainable mean ?

Answer 2

Making sure something is usable for the next generation and is safe for the future

Question 3

What is bad about finite resources ?

Answer 3

They’re unsustainable

Question 4

What is good about renewable resources ?

Answer 4

They’re sustainable for the future

Question 5

What is potable water ?

Answer 5

Safe to drink but not pure

Question 6

What does it mean when the water is not pure ?

Answer 6

More than one element present in it

Question 7

How to produce potable water ?

Answer 7

Filtration of big particles

Sterilising

Question 8

What are the three sterilisation methods for water ?

Answer 8

chlorine, ozone and uv

Question 9

How can you make potable water from sea water ?

Answer 9

Reverse osmosis or distillation

Question 10

How do you do distillation ?

Answer 10

heat until it boils, The salt remains in the liquid, and the steam is pure water. The steam is cooled and condensed to make potable water.

Question 11

How do you do reverse osmosis ?

Answer 11

Water is put under high pressure and passed through a membrane which has tiny pores this prevents harmful ions getting through

Question 12

What are the 4 steps for water treatment method ?

Answer 12

1. screening and grit removal to remove large particles
2. sedimentation allows tiny particles to settle out from still water, which produces sewage sludge and effluent (the liquid which remains on top)
3. the sewage sludge is digested anaerobically by specific bacteria
4. the effluent is treated with aerobic bacteria to reduce the volume of solid waste

Question 13

What’s the method for the water purification practical ( 3 steps )?

Answer 13

1. For each sample of water you are given, test the pH using either a pH meter or universal indicator and an appropriate colour chart. Record your observations carefully.
2. For each sample of water, pour 50 cm3 into a clean pre-weighed evaporating basin. Heat gently over a Bunsen burner, tripod and gauze until no liquid remains.
3. Allow to cool, then weigh the evaporating basin again and calculate the mass of solid that remains in the evaporating basin.

Question 14

What’s the 4 steps of the life cycle assessment ?

Answer 14

1. Extraction of raw materials
2. Manufacturing of product
3. Use of product
4. Disposal of product

Question 15

What are some ways of extracting raw materials ?

Answer 15

Quarrying and mining

Question 16

Down sides of extraction of raw materials ?

Answer 16

Damage to habitats

Question 17

Why is recycling important ?

Answer 17

Prevents pollution

Sustainable for natural resources that are finite

Question 18

What is phytomining ?

Answer 18

The extraction of metal ores through growing of crops

Question 19

What’s are the steps of phytoming ?

Answer 19

1. Plants that absorb metal ores are grown
2. Plants grow absorbing metal ores
3. Plants are harvested then burnt
4. Collection of metal ores in the ash

Question 20

What is bioleaching ?

Answer 20

The use of chemicals to extract metal ores form the ground

Question 21

What’s the two factors of rusting ?

Answer 21

Air and water

Question 22

What is sand made from ?

Answer 22

Sand, sodium and limestone

Question 23

How do you make ammonia ?

Answer 23

A reversible reaction using nitrogen and hydrogen

Question 24

What is le chatelier’s principle ?

Answer 24

What ever you do to a reaction it will do the opposite

Question 25

What do fertilisers provide to plants ?

Answer 25

Mineral ions so they can grow meaning enhanced crop yield

Question 26

Explain how increasing pressure will affect the yield of NH3 ? N2 + 3H2 <—-> 2NH3

Answer 26

Because of le chateliers principle the reaction will do the opposite so the pressure will decrease this means it will shift right as there is less

Question 27

Explain how decreasing pressure will affect the yield of NH3 ? N2 + 3H2 <—-> 2NH3

Answer 27

Again because of le chateliers principle the reaction will do the opposite so it will increase pressure this means this will shift left as there is more