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Science lesson plan · 5th grade (Year 6 in England) · 60 minutes

Graph where Earth's water is: salty, frozen and fresh

Earth and rocks

CCSS NGSS.5-ESS2-2England: KS2 Geography linksEngland: KS3 Chemistry: Earth and atmosphere

Objective and success criteria

Students will: Graph where Earth's water is: salty, frozen and fresh.

  • 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: Salt water or fresh water? Where Earth's water is

Leads to: the next skill in this area.

Materials: Rock samples, Hand lenses, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 6 min

  • Quick retrieval from earlier learning (Salt water or fresh water? Where Earth's water is). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Is this salt water or fresh water: the Pacific Ocean? (salt water / fresh water) → salt waterPrompt: Is it part of the sea, or does it come from rain, snow and rivers?
  2. Why is it important to save fresh water? (Only a tiny part of Earth's water is fresh and easy to reach. / Fresh water is the same as seawater. / Plants do not need water. / There is more fresh water than salt water.) → Only a tiny part of Earth's water is fresh and easy to reach.Prompt: Most water is salty or frozen.
  3. True or false? Glaciers are made of salt water. (True / False) → FalsePrompt: Oceans are salty. Where else is water found?

Hook · 6 min

  • Pass round different rocks and ask how each one might have formed.
  • Share the objective: Graph where Earth's water is: salty, frozen and fresh. Read the success criteria together.

I do: model it · 12 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: About 97% of Earth's water is salty and 3% is fresh. If all of Earth's water were shrunk into 1000 litres, about how many litres would be fresh water?
  • Step 1: 3 × 1000 ÷ 100 = 30
  • Step 2: So the answer is: 30 L
  • Answer: 30 L
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 12 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. About 97% of Earth's water is salty and 3% is fresh. If all of Earth's water were shrunk into 100 litres, about how many litres would be fresh water? → 3 LPrompt: Per cent means 'out of 100'.
  2. Which water store is the largest on Earth? (groundwater / the oceans / rivers / glaciers) → the oceansPrompt: About 97% of all water is in one place.

You do: independent practice · 17 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 · 7 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Which water store is the largest on Earth? (rivers / the oceans / groundwater / glaciers) → the oceansPrompt: About 97% of all water is in one place.
  2. About 97% of Earth's water is salty and 3% is fresh. If all of Earth's water were shrunk into 200 litres, about how many litres would be fresh water? → 6 LPrompt: Per cent means 'out of 100'.

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: Salt water or fresh water? Where Earth's water is.
  • Use concrete materials: rock samples.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • 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-5.

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

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Graph where Earth's water is: salty, frozen and fresh

Name

Date

Score/ 8

  1. Question 1

    About 97% of Earth's water is salty ocean water. If all of Earth's water were shrunk into 200 litres, about how many litres would be salty ocean water?

    AnswerL

  2. Question 2

    Why could melting ice sheets cause sea levels to rise?

    • A. Oceans shrink when it is warm.
    • B. Water from ice on land flows into the oceans.
    • C. Melting makes new water from nothing.
    • D. Ice is heavier than water.

  3. Question 3

    The chart shows where Earth's fresh water is found. What percentage is groundwater?

    Where Earth's FRESH water is (%)01020304050607069ice and glaciers30groundwater1lakes, rivers, soil and air

    Answer%

  4. Question 4

    About 97% of Earth's water is salty and 3% is fresh. If all of Earth's water were shrunk into 500 litres, about how many litres would be fresh water?

    AnswerL

  5. Question 5

    About 97% of Earth's water is salty and 3% is fresh. If all of Earth's water were shrunk into 200 litres, about how many litres would be fresh water?

    AnswerL

  6. Question 6

    Only about 1% of Earth's fresh water is easy to reach in lakes and rivers. What should people do?

    • A. Pour waste into rivers.
    • B. Use water carefully and keep it clean.
    • C. Use as much as possible.
    • D. Nothing; water never runs out.

  7. Question 7

    The chart shows where Earth's fresh water is found. What percentage is lakes, rivers, soil and air?

    Where Earth's FRESH water is (%)01020304050607069ice and glaciers30groundwater1lakes, rivers, soil and air

    Answer%

  8. Question 8

    Which water store is the largest on Earth?

    • A. rivers
    • B. the oceans
    • C. glaciers
    • D. groundwater

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Answer key: Graph where Earth's water is: salty, frozen and fresh

  1. 1. 194 L

  2. 2. B. Water from ice on land flows into the oceans.

  3. 3. 30 %

  4. 4. 15 L

  5. 5. 6 L

  6. 6. B. Use water carefully and keep it clean.

  7. 7. 1 %

  8. 8. B. the oceans