Interpreting and interacting with earth systems (C6.2) | OCR GCSE Combined Science A (Gateway Science) — Chemistry — Higher (J250) | KnowledgeSet

Interpreting and interacting with earth systems

Chemistry (Combined Science) · GCSE · OCR · OCR GCSE Combined Science A (Gateway Science) — Chemistry — Higher (J250) · Specification point · C6.2 · Global challenges

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Learning Objectives

C6.2 Interpreting and interacting with earth systems

Summary As our understanding of the structure of materials and chemical processes has improved we are increasing our ability to interpret and understand chemical and earth systems. Understanding how we interact with them is very important to our survival as a species. This section starts with the history of the atmosphere and moves on to how human activity could be affecting its composition. Underlying knowledge and understanding Learners should have some understanding of the composition of the Earth, the structure of the Earth, the rock cycle, the carbon cycle, the composition of the atmosphere and the impact of human activity on the climate. Common misconceptions Learners think that the atmosphere is large and that small increases of carbon dioxide or a few degrees of temperature change do not make a difference to the climate. They may consider that global warming is caused by the ozone hole and that human activities alone cause the greenhouse effect.

Reference	Mathematical learning outcomes	Maths skills
$CM6.2i$	$extract and interpret information from charts, graphs and tables$	$M2c, M4a$

Learning outcomes	To include	Maths	Working scientifically
$C6.2a interpret evidence for how it is thought the atmosphere was originally formed$	$knowledge of how the composition of the atmosphere has changed over time$	$M2c, M4a, M2h$	$WS1.3e$
$C6.2b describe how it is thought an oxygen-rich atmosphere developed over time$		$M2h$	$WS1.1a$
$C6.2c describe the greenhouse effect in terms of the interaction of radiation with matter within the atmosphere$
$C6.2d evaluate the evidence for additional anthropogenic (human activity) causes of climate change and describe the uncertainties in the evidence base$	$the correlation between change in atmospheric carbon dioxide concentration and the consumption of fossil fuels$	$M2c, M4a, M2h$
$C6.2e describe the potential effects of increased levels of carbon dioxide and methane on the Earth’s climate and how these effects may be mitigated$	$consideration of scale, risk and environmental implications$	$M2c, M4a, M2h$	$WS1.1f, WS1.1h$
$C6.2f describe the major sources of carbon monoxide, sulfur dioxide, oxides of nitrogen and particulates in the atmosphere and explain the problems caused by increased amounts of these substances$			$WS1.4a$
$C6.2g describe the principal methods for increasing the availability of potable water in terms of the separation techniques used$	$ease of treatment of waste, ground and salt water$