GCSE Chemistry revision

Using the Earth's resources and sustainable development

Using the Earth's resources and obtaining potable water

AQA 4.10.1.1 Foundation & Higher

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Natural products harvested from the wild are supplemented or replaced by synthetic chemicals or managed agricultural crops to meet rising global demand and conserve natural habitats.
Example: Natural rubber extracted from rubber trees is supplemented by synthetic rubber manufactured from crude oil polymers to produce car tyres. Similarly, natural dyes (like indigo from plants) have been largely replaced by synthetic chemical dyes.

1. Supplementing Natural Materials AQA

Natural products harvested from the wild are supplemented or replaced by synthetic chemicals or managed agricultural crops to meet rising global demand and conserve natural habitats.
Example: Natural rubber extracted from rubber trees is supplemented by synthetic rubber manufactured from crude oil polymers to produce car tyres. Similarly, natural dyes (like indigo from plants) have been largely replaced by synthetic chemical dyes.

Managed agriculture allows resources to be grown systematically rather than gathered from natural ecosystems, ensuring consistent quality and yield.
Example: Cotton grown as an agricultural crop replaces wild plant fibres for clothing, and managed timber plantations replace wild logging to supply construction wood.

2. Agricultural Replacements AQA

Managed agriculture allows resources to be grown systematically rather than gathered from natural ecosystems, ensuring consistent quality and yield.
Example: Cotton grown as an agricultural crop replaces wild plant fibres for clothing, and managed timber plantations replace wild logging to supply construction wood.

Finite resources are consumed at a rate much faster than they can naturally form, meaning their global reserves are limited and will eventually run out.
Example: Crude oil, limestone, and metal ores (such as copper ore) are finite resources formed over millions of years that cannot be replenished on a human time scale once extracted.

3. Finite Resources AQA

Finite resources are consumed at a rate much faster than they can naturally form, meaning their global reserves are limited and will eventually run out.
Example: Crude oil, limestone, and metal ores (such as copper ore) are finite resources formed over millions of years that cannot be replenished on a human time scale once extracted.

Renewable resources are replenished by natural or agricultural processes at a rate equal to or faster than they are consumed, ensuring a continuous supply if managed sustainably.
Example: Solar energy, timber from replanted forests, and ethanol biofuel produced from fermented sugarcane are renewable resources.

4. Renewable Resources AQA

Renewable resources are replenished by natural or agricultural processes at a rate equal to or faster than they are consumed, ensuring a continuous supply if managed sustainably.
Example: Solar energy, timber from replanted forests, and ethanol biofuel produced from fermented sugarcane are renewable resources.

Datasets, pie charts, and line graphs allow for evaluating rates of resource depletion, comparing reserve lifetimes, and determining recycling efficiency across different industries.
Example: Comparing a bar graph of copper ore reserves over time against a line graph of global copper demand helps predict when known reserves will become depleted unless recycling rates increase.

5. Interpreting Data from Charts and Tables AQA

Datasets, pie charts, and line graphs allow for evaluating rates of resource depletion, comparing reserve lifetimes, and determining recycling efficiency across different industries.
Example: Comparing a bar graph of copper ore reserves over time against a line graph of global copper demand helps predict when known reserves will become depleted unless recycling rates increase.

Orders of magnitude (powers of 10) are used to compare the scale of resource usage or reserves, determining whether differences between data points are negligible or significant.
Example: If a country uses 1,000,000,000 (10⁹) tonnes of water annually for agriculture and 10,000,000 (10⁷) tonnes for industrial washing, the agricultural use is 2 orders of magnitude (100 times) larger, showing where conservation efforts should be focused.

6. Using Orders of Magnitude to Evaluate Significance AQA

Orders of magnitude (powers of 10) are used to compare the scale of resource usage or reserves, determining whether differences between data points are negligible or significant.
Example: If a country uses 1,000,000,000 (10⁹) tonnes of water annually for agriculture and 10,000,000 (10⁷) tonnes for industrial washing, the agricultural use is 2 orders of magnitude (100 times) larger, showing where conservation efforts should be focused.