Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What do humans use the Earth's resources for?
   • Humans use the Earth's resources to provide warmth, shelter, food and transport.
2. What do natural resources provide?
   • Natural resources, supplemented by agriculture, provide food, timber, clothing and fuels.
3. What are finite resources used for?
   • Finite resources from the Earth, oceans and atmosphere are processed to provide Energy and materials.
4. What role has Chemistry played in improving agricultural and industrial processes?
   • Chemistry plays an important role in improving agricultural and industrial processes toprovide new products and in sustainable development, which is development that meets the needs of current generations without compromising the ability of future generations to meet their own needs.
5. What are the names of natural products that are supplemented or replaced by agricultural and synthetic products?
   • The natural products that are supplemented/replaced by agricultural or synthetic products are nitrogen, phosphorus and potassium.
6. What is the difference between finite and renewable resources?
   • Finite resources are those which are limited. Renewable resources are those which can be replenished at the same rate that they are used up.
7. What are orders of magnitude?
   • A system of classification determined by size, typically in powers of ten.
8. What different aspects of a products lifetime are assessed through a life cycle assessment?
   • Life cycle assessments (LCAs) are carried out to assess the environmental impact of products in each of these stages: - extracting and processing raw materials - manufacturing and packaging - use and operation during its lifetime - disposal at the end of its useful life, including transport and distribution at each stage.
9. Why are life cycle assessment not a purely objective process?
   • Life cycle assessments are not a purely objective process because allocating numerical values to pollutant effects is less straightforward and requires value judgments.
10. Why is it important that life cycle assessments are completed by an unbiased impartial agency?
    • It is important that life cycle assessments are completed using an unbiased impartial agency to avoid misuse of data to reach pre-determined conclusions. e.g. to support a claim that a product is more environmentally friendly.
11. What are the life cycle assessments that would be conducted for plastic and paper carrier bags?
    • The life cycle assessments that would be conducted for plastic and paper bags are the raw materials, manufacturing processing, which lasts longer, disposal, transport, emissions and waste.