C14 The Earth's Resources

Question 1

What is the ore for copper?

Answer 1

Malachite

Question 2

What is malachite?

Answer 2

Copper ore

Question 3

What are the two types of resources?

Answer 3

Finite
Renewable

Question 4

What are finite resources?

Answer 4

Resources that’ll run out and they cannot be replenished

Question 5

What is a renewable resource?

Answer 5

Resources that’ll never run out and we can replace it once we have used it

Question 6

What are the methods to reduce the use of the earth’s resources?

Answer 6

• Reusing
• Recycling

Question 7

What the pros of reusing to reduce the use of the earth’s resources?

Answer 7

1) Conserves raw materials
2) Reduces use of energy for manufacturing
3) Reduces emmision of CO2
4) Reduces pollution by waste
5) Conserves limited landfill sites

Question 8

What the cons of reusing to reduce the use of the earth’s resources?

Answer 8

• Quality of product won’t be the same
• It will eventually end up in a landfill site

Question 9

What are the stages of recycling?

Answer 9

1) Collecting and transporting materials/products into recycling sites.
2) Sorting out products according to type,color etc
3) Cleaning by using water and chemicals
4) Melting and crushing
5) Remoulding

Question 10

What the pros of recycling to reduce the use of the earth’s resources?

Answer 10

Reduces pollution by waste
Conserves limited land sites
Reduces/conserves raw materials
Less enegy is needed compared to manufacturing
Less emmision of CO2

Question 11

What the cons of recycling to reduce the use of the earth’s resources?

Answer 11

Labour and time consuming
Contaminted water and chemicals relased into enviroment
Less quality
Expensive
Still causes pollution

Question 12

What is a Life Cycle Assessment (LCA)?

Answer 12

This is an examination of the impacd of a product on the enviroment througout it’s life.

Question 13

What factors are considered in the Life Cycle Assessment (LCA)?

Answer 13

1) Sustainablibity of raw materials
2) Use of energy at all stages
3) Use of water at all stages
4) Distribution
5) Manufacturing and Disposal of product

Question 14

What stages are considered in a Life Cycle Assessment?

Answer 14

1) Raw Materials
2) Sustainablity
3) Obtaining and transporting raw materials
4) Manufacturing
5) Use
6) Disposal

Question 15

What is distiled/pure water?

Answer 15

Water that only contains H20 only

Question 16

What is potable water?

Answer 16

Water that is safe for consumption

Question 17

What criteria must potable water meet?

Answer 17

• PH between 6.5 and 8.5
• Dissolved substance will be present but in very small regulated quantities
• Be free of bacteria or potentially harmfull microbes

Question 18

How is water from freshwater sources made potable?

Answer 18

Filtration
Sterialization (Chlorine gas or Ozone)

Question 19

Analysing sample of water Required Practical?

Answer 19

1. Use universal indicator to test the pH of the water.
2. Measure and record the mass of an empty evaporating basin.
3. Pour 10 cm3 water into the evaporating basin and evaporate the water using a bunsen burner until the most of the water has evaporated.
4. Once the evaporating basin is cool, reweigh and record the change in mass.
5. Calculate the mass of dissolved solids in the water.

Question 20

Purfying a sample of water by distilation ,requried practical?

Answer 20

1. Place the water sample in a conical flask and set up the apparatus for distillation.
2. Heat the water gently using a bunsen burner until it boils. Then reduce the heat so the water boils gently.
3. Collect around 1 cm depth of water in the cooled test tube, then stop turn the bunsen burner off.
4. Analyse the water you have distilled with cobalt chloride paper.