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Data and Decisions · Summer Term

Bar Charts and Pictograms

Creating and interpreting bar charts and pictograms to represent categorical data.

Key Questions

  1. Analyze how the scale on a bar chart can be used to mislead an audience.
  2. Differentiate between a bar chart and a pictogram.
  3. Design an appropriate pictogram to represent a given dataset.

National Curriculum Attainment Targets

KS3: Mathematics - Statistics
Year: Year 7
Subject: Mathematics
Unit: Data and Decisions
Period: Summer Term

About This Topic

The atmosphere and climate explore the composition of the air and the factors that influence the Earth's climate. Students learn about the history of the atmosphere, the greenhouse effect, and the impact of human activities on global climate change. They also investigate the importance of the atmosphere for supporting life on Earth.

This unit aligns with the National Curriculum attainment targets for the Earth and atmosphere. It provides a critical context for understanding one of the most significant challenges facing humanity today. Learning about the atmosphere and climate is essential for students to become informed and responsible global citizens. This topic comes alive when students can physically model the patterns of the greenhouse effect and participate in structured debates about climate action.

Active Learning Ideas

Watch Out for These Misconceptions

Common MisconceptionThe greenhouse effect is a bad thing.

What to Teach Instead

Explain that the natural greenhouse effect is essential for life, as it keeps the Earth at a habitable temperature. The problem is the 'enhanced' greenhouse effect caused by human activity. Peer discussion about a 'blanket' can help students understand this distinction.

Common MisconceptionThe ozone layer and the greenhouse effect are the same thing.

What to Teach Instead

Clarify that the ozone layer protects us from UV radiation, while the greenhouse effect relates to the trapping of heat in the atmosphere. A collaborative sorting activity of different atmospheric issues can help students keep these concepts separate.

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Frequently Asked Questions

What is the composition of the Earth's atmosphere today?
The Earth's atmosphere is approximately 78% nitrogen, 21% oxygen, and 1% other gases, including argon, carbon dioxide, and water vapour. These proportions have changed significantly over the planet's history.
What are the best hands-on strategies for teaching climate change?
The best strategies involve modeling the greenhouse effect and analyzing real-world data. Using simple experiments to show how greenhouse gases trap heat provides a concrete foundation. Structured debates and role plays also allow students to explore the complex social and economic factors involved in addressing climate change, encouraging critical thinking and empathy.
How has the Earth's atmosphere changed over time?
The early atmosphere was mostly carbon dioxide and water vapour from volcanic activity. As the Earth cooled, the water vapour condensed to form oceans. Later, the evolution of photosynthesising organisms led to a decrease in carbon dioxide and a significant increase in oxygen.
What are the main human activities contributing to climate change?
The main activities are the burning of fossil fuels for energy and transport, deforestation, and industrial processes. These activities release large amounts of greenhouse gases, such as carbon dioxide and methane, into the atmosphere.

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