Grade by Grade
E. Earth and Space Systems · Air and Water in the Environment

Air and Water in the Environment: Unit Review

E1.1 E1.2 E1.3 E2.1 E2.2 E2.3 E2.4 E2.5 A1.1 A1.2 A1.3 A1.4 A1.5 A2.1 A2.2 A3.1 A3.3About 40 minutes
Learning goals
  • I can describe properties of air and water and the three states of water.
  • I can explain the water cycle and how it makes weather.
  • I can name sources of water and explain how living things depend on air and water.
  • I can explain how to use water wisely, protect air and water, and why safe drinking water matters.

Words to know

water cycle
Water's never-ending trip: evaporation, condensation, precipitation, collection.
water vapour
Water as an invisible gas.
pollution
Something harmful or dirty that gets into the air, water or land.
conserve
To use something carefully so it isn't wasted.

Let's review!

You have learned a lot about air and water: what they are like, how water changes and travels, where we find it, why living things need it, and how we can protect it. This review has a few questions from every lesson. Try each one, then press Show answer to check. If a part feels tricky, go back to that lesson.

Air Is All Around Us

1

Why does a paper towel stay dry in a cup pushed upside down into water?

2

What is wind?

3

True or false: Air has mass.

AIRWATERcan't be seen(clean air)a gassqueezes easilycan be seena liquidhardly squeezesBOTHtakes up spacehas masscan moveliving thingsneed it
Air and water: how they are different on the sides, and what they share in the middle.

What Is Water Like?

1

You pour 1 cup of water from a tall glass into a wide bowl. How much water is in the bowl?

2

Sort: salt, sand, sugar, oil. Which dissolve in water?

3

Name one way air and water are different.

Ice, Water and Water Vapour

1

Name the three states of water and one example of each.

2

A puddle dries up on a sunny day. What change happened?

3

Why do drops form on the outside of a cold glass?

2. Condensationclouds form3. Precipitationrain or snow falls4. Collectionlakes and rivers1. Evaporationvapour risesrepeat forever!
The water cycle is a loop: evaporation, condensation, precipitation, collection, and around again.

The Water Cycle

1

Put the stages in order: precipitation, collection, evaporation, condensation.

2

Which stage makes clouds?

3

A code says repeat 2 times: evaporate, condense, precipitate, collect. How many times does the drop make a cloud?

Air, Water and Weather

1

It is −8°C and precipitation is falling. Rain or snow?

2

What is the difference between dew and frost?

3

Your rain gauge shows 8 mm on Tuesday and 15 mm on Saturday. How much rain in all?

Where Do We Find Water?

1

Sort: lake, well, glacier, water tower.

2

Is most of Earth's water fresh or salty?

3

Put in order: home, treatment plant, lake, water tower.

Living Things Need Air and Water

1

How does a fish get oxygen?

2

How does a maple tree get water?

3

Name one way people use moving water or wind.

Using Water Wisely at Home

1

Name two ways to save water at home.

2

Sam caught 9 L with the tap running and 2 L with it off. How much did he save?

3

What does ||||/ ||||/ || show on a tally chart?

Keeping Our Air and Water Clean

1

Why shouldn't paint go down a storm drain?

2

Name one way to keep air clean.

3

What do many First Nations, Métis and Inuit teachings say about water?

Clean Drinking Water for Everyone

1

Why can clear water still be unsafe?

2

What does a boil water advisory tell people to do?

3

Your homemade filter made muddy water look clear. Can you drink it?

4

Name one reason a child might not have safe water close to home.

Just for fun

What did the ocean say to the beach?

Nothing. It just waved!

How to use this review

  • Do the review over two short sittings if your child gets tired. Each section matches one lesson.
  • Let your child explain answers in their own words. Using science words like evaporate and condense is part of Grade 2 science.
  • For "why" questions, any answer that shows the right idea is fine, even if the words are different.
  • Note which section had mistakes, then revisit that lesson's activity and practice.
Check your understanding

Quiz

1.

Air is a...

2.

Which dissolves in water?

3.

Ice melting into water is a change caused by...

4.

Which stage of the water cycle comes after condensation?

5.

Wet grass on a cool morning with no rain is...

6.

Which is a built water source?

7.

A loon must come up to the surface because it...

8.

Which saves water?

9.

Pouring oil down a storm drain...

10.

Water from a homemade sand filter...

For parents and teachers

Use mistakes to choose what to revisit. Each review section matches one lesson.

  • Thinks an "empty" cup has nothing in it, or that air has no mass: revisit Air Is All Around Us and redo the cup test.
  • Thinks pouring water into a bigger container changes the amount, or mixes up dissolve and melt: revisit What Is Water Like?
  • Mixes up melt, freeze, evaporate and condense, or thinks steam is water vapour: revisit Ice, Water and Water Vapour.
  • Can't order the four stages, or mixes up evaporation and condensation: revisit The Water Cycle and redo the water cycle bag.
  • Can't link temperature to rain or snow, or mixes up dew and frost: revisit Air, Water and Weather.
  • Sorts wells or reservoirs as natural, or thinks most water is fresh: revisit Where Do We Find Water?
  • Thinks fish breathe water, or that plants don't need air: revisit Living Things Need Air and Water.
  • Trouble reading tallies or subtracting litres, or thinks saving water means not washing: revisit Using Water Wisely at Home.
  • Thinks all drains go to a treatment plant, or can't name another perspective: revisit Keeping Our Air and Water Clean.
  • Thinks clear water is always safe, or that everyone in Canada has safe tap water: revisit Clean Drinking Water for Everyone.

A few mistakes are normal. Praise your child's explanations and their use of science words, not only right answers.