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Global challenges
Revision and exam practice for Global challenges.
20
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10
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10
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90 min
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OcrGcseCombined Science A GatewayGlobal challenges
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20 objective pages available
Metal Extraction and the Reactivity Series1 objectives
- Develop secure knowledge and application of explain, using the position of carbon in the reactivity series, the principles of industrial processes used to extract metals, including extraction of a non-ferrous metal
Electrolysis for Metal Extraction1 objectives
- Account for why and how electrolysis is used to extract some metals from their ores.
Higher: Evaluating Alternative Biological Methods of Metal Extraction1 objectives
- Judge using evidence alternative biological methods of metal extraction.
Understanding Life Cycle Assessments (LCAs)1 objectives
- Communicate the key features of the basic principles in carrying out a life-cycle assessment of a material or product.
Interpreting Data from a Life Cycle Assessment (LCA)1 objectives
- Draw supported meaning from data from a life-cycle assessment of a material or product.
Recycling Materials for Different Uses (Upcycling)1 objectives
- Communicate the key features of a process where a material or product is recycled for a different use, and explain why this is viable.
Deciding on Recycling: Factors to Consider1 objectives
- Judge using evidence factors that affect decisions on recycling.
Fractional Distillation of Crude Oil1 objectives
- Communicate the key features of the separation of crude oil by fractional distillation.
Fractional Distillation of Crude Oil1 objectives
- Account for the separation of crude oil by fractional distillation.
Understanding Crude Oil Fractions: Alkanes and Homologous Series1 objectives
- Communicate the key features of the fractions as largely a mixture of compounds of formula C H which are n 2n+2 members of the alkane homologous series.
Crude Oil: Source of Hydrocarbons and Petrochemical Feedstock1 objectives
- Retrieve and apply knowledge of crude oil is a main source of hydrocarbons and is a feedstock for the petrochemical industry.
Hydrocarbons: The Pillars of Modern Life and Their Finite Nature1 objectives
- Account for the way modern life is crucially dependent upon hydrocarbons and recognise that crude oil is a finite resource.
Understanding Cracking: Breaking Down Big Hydrocarbons1 objectives
- Communicate the key features of the production of materials that are more useful by cracking.
Early Earth's Atmosphere Formation1 objectives
- Draw supported meaning from evidence for how it is thought the atmosphere was originally formed.
The Evolution of Earth's Oxygen-Rich Atmosphere1 objectives
- Communicate the key features of the way it is thought an oxygen-rich atmosphere developed over time.
Understanding the Greenhouse Effect1 objectives
- Communicate the key features of the greenhouse effect in terms of the interaction of radiation with matter within the atmosphere.
Evidence for Anthropogenic Climate Change and Uncertainties1 objectives
- Judge using evidence the evidence for additional anthropogenic (human activity) causes of climate change and describe the uncertainties in the evidence base.
Carbon Dioxide, Methane, and Climate Change1 objectives
- Communicate the key features of the potential effects of increased levels of carbon dioxide and methane on the Earth’s climate and how these effects may be mitigated.
Atmospheric Pollutants: Sources and Problems1 objectives
- Communicate the key features of the major sources of carbon monoxide, sulfur dioxide, oxides of nitrogen and particulates in the atmosphere and explain the problems caused by increased amounts of these substances.
Producing Potable Water through Separation Techniques1 objectives
- Communicate the key features of the principal methods for increasing the availability of potable water in terms of the separation techniques used.
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Practice preview
- Why is crude oil considered a main source of hydrocarbons?
- Which of the following is primarily formed due to the incomplete combustion of fossil fuels?
- Unofficial practice material (Higher) A mining company is considering using bioleaching to extract copper from a low-grade ore deposit that is not economically viable for traditional smelting. Discuss the scientific principles behind bioleaching and evaluate its suitability for this scenario, considering its advantages and disadvantages. [4 marks]
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