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Science lesson plan · 8th grade (Year 9 in England) · 30 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 · 4 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 Singapore have? (polar / tropical / desert (arid) / temperate) → tropicalPrompt: Is it near the poles, near the equator, very dry, or in between?
  2. Why are decomposers important for plants? (They release nutrients (minerals) back into the soil / They make plants grow faster in the dark / They eat plant pests only / They give plants sunlight) → They release nutrients (minerals) back into the soilPrompt: Where do plants get minerals from?
  3. Which place is likely to have the coldest winters? (northern Canada / Singapore / the Sahara / the Amazon) → northern CanadaPrompt: Which is furthest from the equator?

Hook · 3 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 · 7 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 · 6 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 of these is a greenhouse gas? (methane / nitrogen / oxygen / argon) → methanePrompt: Cattle and rice paddies release it.
  2. Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 400 ppm. By how many ppm has it risen? → 120 ppmPrompt: Subtract the old value from the new value.

You do: independent practice · 7 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 6 questions are on the student sheet below, with answers in the key.

Exit ticket · 3 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Which is an effect of climate change? (more oxygen in the air / the end of all weather / the Earth stopping rotating / rising sea levels as ice melts and seawater expands) → 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 410 ppm. By what percentage has it increased? Give a whole number. → 46 %Prompt: First find the increase.

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/ 6

  1. Question 1

    Climate change: which statement is NOT true?

    • A. The greenhouse effect is caused by the hole in the ozone layer.
    • B. Burning fossil fuels increases carbon dioxide in the atmosphere.
    • C. Planting trees can help absorb carbon dioxide.
    • D. Global average temperatures have risen since the 1800s.

  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

    Which is an effect of climate change?

    • A. the end of all weather
    • B. rising sea levels as ice melts and seawater expands
    • C. the Earth stopping rotating
    • D. more oxygen in the air

  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 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. The greenhouse effect is caused by the hole in the ozone layer.

  2. 2. 50 %

  3. 3. B. rising sea levels as ice melts and seawater expands

  4. 4. 120 ppm

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

  6. 6. 43 %