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Science lesson plan · 8th grade (Year 9 in England) · 45 minutes

The greenhouse effect and climate change

Weather and climate

CCSS NGSS.MS-ESS3-5CCSS NGSS.HS-ESS3-5CCSS NGSS.HS-ESS2-4England: KS3 Chemistry: Earth and atmosphereEngland: KS4 Combined Science: Earth and atmospheric science

Objective and success criteria

Students will: The greenhouse effect and climate change.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Weather and climate zones; Decomposers and recycling nutrients

Leads to: Carbon footprints and ways to cut emissions; Analyse climate data: COâ‚‚ records and temperature trends

Materials: Weather maps, Thermometers, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 5 min

  • Quick retrieval from earlier learning (Weather and climate zones; Decomposers and recycling nutrients). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. What type of climate does the Congo rainforest have? (polar / tropical / desert (arid) / temperate) → tropicalPrompt: Is it near the poles, near the equator, very dry, or in between?
  2. Compost heaps rot faster when they are… (frozen / warm, moist and have air / sealed in plastic with no air / completely dry) → warm, moist and have airPrompt: Microorganisms need suitable conditions to grow.
  3. Which sentence describes climate, not weather? (It was windy yesterday / It is raining in London today / There will be a storm tonight / Spain usually has hot, dry summers) → Spain usually has hot, dry summersPrompt: Look for "usually".

Hook · 5 min

  • Show today's forecast and ask what it means for the class and how forecasters know.
  • Share the objective: The greenhouse effect and climate change. Read the success criteria together.

I do: model it · 10 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: Which is an effect of climate change?
  • Step 1: Melting ice and warming oceans raise sea levels; extreme weather becomes more frequent.
  • Step 2: So the answer is: rising sea levels as ice melts and seawater expands
  • Answer: rising sea levels as ice melts and seawater expands
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 10 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. Which is an effect of climate change? (more oxygen in the air / rising sea levels as ice melts and seawater expands / the end of all weather / the Earth stopping rotating) → rising sea levels as ice melts and seawater expandsPrompt: What happens to glaciers when it warms?
  2. Before 1800, carbon dioxide in the air was about 280 parts per million (ppm). Recently it was about 400 ppm. By what percentage has it increased? Give a whole number. → 43 %Prompt: First find the increase.

You do: independent practice · 10 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

Exit ticket · 5 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Climate change: which statement is NOT true? (The greenhouse effect is caused by the hole in the ozone layer. / Planting trees can help absorb carbon dioxide. / Without any greenhouse effect, Earth would be too cold for most life. / Global average temperatures have risen since the 1800s.) → The greenhouse effect is caused by the hole in the ozone layer.Prompt: Is the ozone hole the same as the greenhouse effect?
  2. Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 420 ppm. By how many ppm has it risen? → 140 ppmPrompt: Subtract the old value from the new value.

Watch out for

  • Everyday meanings of words getting in the way of the science meaning: define key words explicitly.
  • Remembering facts without the reason: ask "why?" and "what is the evidence?"

Support and stretch

Support

  • Review first: Weather and climate zones.
  • Use concrete materials: weather maps.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Carbon footprints and ways to cut emissions; Analyse climate data: COâ‚‚ records and temperature trends.
  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-8.

Free lesson plan from eurekami.com/lesson-plan-builder

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The greenhouse effect and climate change

Name

Date

Score/ 8

  1. Question 1

    Climate change: which statement is NOT true?

    • A. Oxygen is the main greenhouse gas.
    • B. Global average temperatures have risen since the 1800s.
    • C. Without any greenhouse effect, Earth would be too cold for most life.
    • D. Planting trees can help absorb carbon dioxide.

  2. Question 2

    Before 1800, carbon dioxide in the air was about 280 parts per million (ppm). Recently it was about 420 ppm. By what percentage has it increased? Give a whole number.

    Answer%

  3. Question 3

    What does the greenhouse effect do?

    • A. It makes oxygen
    • B. It makes holes in the atmosphere
    • C. It reflects all sunlight back to space
    • D. Greenhouse gases trap some heat, keeping Earth warm enough for life

  4. Question 4

    Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 400 ppm. By how many ppm has it risen?

    Answerppm

  5. Question 5

    What is the main cause of the recent rise in global temperatures?

    • A. the Sun getting much hotter
    • B. volcanoes only
    • C. human activities adding greenhouse gases, especially by burning fossil fuels
    • D. the Moon moving closer

  6. Question 6

    Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 410 ppm. By how many ppm has it risen?

    Answerppm

  7. Question 7

    Which of these is a greenhouse gas?

    • A. argon
    • B. oxygen
    • C. methane
    • D. nitrogen

  8. Question 8

    Before 1800, carbon dioxide in the air was about 280 parts per million (ppm). Recently it was about 400 ppm. By what percentage has it increased? Give a whole number.

    Answer%

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Answer key: The greenhouse effect and climate change

  1. 1. A. Oxygen is the main greenhouse gas.

  2. 2. 50 %

  3. 3. D. Greenhouse gases trap some heat, keeping Earth warm enough for life

  4. 4. 120 ppm

  5. 5. C. human activities adding greenhouse gases, especially by burning fossil fuels

  6. 6. 130 ppm

  7. 7. C. methane

  8. 8. 43 %