1. _____________________________________________
Explain what clues geologists can use to explain the earths history.
6 marks
Key words
Tectonic plates
Mantle
Magnetised
Climate
Fossils
Sediment
Ripples
minerals
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Discuss the structure of the earth.
Explain magnetic clues in rocks.
Explain patterns found in sedimentary rocks
Explain fossil evidence
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

2. _____________________________________________
Salt is extremely important in the food industry. It can be collected/extracted in three different ways. Underground mining, solution mining and from the sea. Discuss which method of salt extraction has the least impact on the environment.
6 marks
Key words
Extraction
Rock salt
Solution mining
Deposits
Dissolve
Brine
Evaporate
Subsidence
Pollution
Purity
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Explain each type of extraction
Discuss environmental impacts
Give an opinion on which impacts the environment the least
Provide evidence to support your opinion
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

3. _____________________________________________
Discuss the risks and benefits of using salt in the food industry.
What can be done about those risks?
6 marks
Key words
Preservative
Stroke
Heart attack
High blood
pressure
Processed
Food Standards
Agency
GDA
Risk
Choice
Advice
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
List reasons for the use of salt in the food industry
List health implications of eating too much salt
Discuss choices that people can make to reduce risk.
Suggest what the government can do to reduce risk
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

4. _____________________________________________
Electrolysis is a method used to produce some very useful chemicals from salt solution. Discuss the products from the electrolysis of brine and their uses.
6 marks
Key words
Electrolysis
Brine
Salt solution
Chlorine
Disinfectants
Hydrogen
Fuel
Ammonia
Hydrogenation
Sodium
hydroxide
Soap
bleach
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Describe how chlorine, hydrogen and sodium hydroxide are produced
List what products can be made from chlorine, hydrogen and sodium hydroxide
Discuss the benefits of these products
Explain why there is little waste products made by electrolysis
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

5. _____________________________________________
The data shows information from a river before and after an electrolysis plant was opened next to it. The plant was opened in Use the data to describe the change in the levels of mercury from 1956 to 1970 and suggest a reason for this. Discuss other environmental impact caused by electrolysis marks
Key words
Electrolysis
Pollution
Environment
Impact
Energy
Toxic
Resources
QWC - Bubbles
Year
1956
1958
1960
1962
1964
1966
1968
1970
Mercury level (ppm)
0.2
0.1
0.3
1.1 2
1.9
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Describe the trend in the data over the years
Describe the change in mercury levels after the electrolysis plant was opened
Explain what problems the increase in mercury might cause
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

6. _____________________________________________
Chlorine is used in water treatment. Discuss the advantages and disadvantages of using chlorine to treat water.
6 marks
Key words
Chlorination
Drinking
Safe
Treatment
WHO
Life expectancy
Carcinogenic
Respiratory
Burn
Risk
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Describe the benefits of using chlorine to treat water
Describe the risks of using chlorine to treat water
Compare the benefits and risks and discuss which is better
Use evidence of how water treatment by chlorine has reduced illness/deaths
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar

7. _____________________________________________
Alkalis have been produced for hundreds of years. Explain how alkalis are useful and reasons why the methods of production has changed over the years.
6 marks
Key words
Neutralising soil
Dyes
Soaps
Glass
Sources
Manufacturing
Cost
Pollution
Waste
Toxic
Efficiency
QWC - Bubbles
Level 3 - 5to 6 marks
Level 2 – 3 to 4 marks
Level 1 – 1 to 2 marks
Complex answer
Extensive key words
Logical order
Excellent spelling, punctuation and grammar
Hints
Describe the Le Blanc process and electrolysis for producing alkalis
Discuss how electrolysis caused less pollution than the L Blanc process
Compare products made from Electrolysis and the Le Blanc process
Explain which is more efficient
Detailed answer
Many key words
Clear order
Good spelling, punctuation and grammar
_____________________________________________
Simple answer
Few key words
No order
Poor spelling, punctuation and grammar