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D. Structures and Mechanisms · Materials, Objects, and Everyday Structures

Materials, Objects, and Everyday Structures: Unit Review

D1.1 D1.2 D2.1 D2.2 D2.3 D2.4 D2.5 D2.6 D2.7 D2.8 A1.1 A1.2 A1.3 A1.4 A1.5 A2.1 A3.1 A3.3About 40 minutes
Learning goals
  • I can name materials, describe their properties and say where they come from.
  • I can explain what structures and fasteners do.
  • I can plan ways to make less waste.

Words to know

material
What an object is made of.
property
Something we can observe about a material, like hard, waterproof or flexible.
structure
An object made to hold up a load.
fastener
Something that holds two things together.
reduce
To use less, so there is less waste.

Let's review!

You have been a scientist and an engineer in this unit! You learned about objects, materials, structures, fasteners and making less waste. This review has a few questions from each lesson. Try each one, then press Show answer to check.

1. Reduceuse lesse.g. both sides of paper2. Reuseuse againe.g. a jar for pencils3. Recyclemake into new thingse.g. cans in the blue boxReduce comes first: the best waste is the waste we never make!
The 3 Rs in order: reduce, reuse, recycle.
wide base: stabletall and thin: tippy!
A wide base makes a structure stable. A tall, thin tower tips over more easily.

Objects and the Materials They Are Made Of

1

Is a fork an object or a material?

2

Name the materials in a pencil.

3

Use two senses to describe a pine cone.

Choosing the Right Material for the Job

1

Why are rain boots made of rubber?

2

Is a paper towel absorbent or waterproof?

3

What is the purpose of a toque?

4

In a fair test, how many things do you change?

Where Do Materials Come From?

1

Where does wool come from?

2

What is glass made from?

3

Why was birch bark a good material for a canoe?

Structures: Built to Hold a Load

1

What is the load on a playground slide?

2

How can you make a tower more stable?

3

What are the frame parts of a tent?

Fasteners: Holding Things Together

1

Name a temporary fastener.

2

Name a permanent fastener.

3

Why does a backpack use a zipper and not glue?

Less Waste: Reduce, Reuse, Recycle

1

You bring your lunch in a container you wash and use again. Which R is this?

2

Where does a rinsed metal can go in many Ontario towns?

3

Name one action you can take to make less waste.

Just for fun

What did the glue say to the paper?

"I'm stuck on you!"

How to use this review

  • Do the review in two short sittings if your child gets tired. Each section matches one lesson.
  • Let your child touch and test real objects while answering. Science is hands-on!
  • Ask "How do you know?" after each answer. A reason that uses a property (strong, waterproof, soft) is the goal.
  • Note which section had mistakes and revisit that lesson's activity.
Check your understanding

Quiz

1.

Which is a material?

2.

A winter boot has a rubber bottom and a fabric lining. It is made of...

3.

Which material is transparent?

4.

Which material is best for a towel?

5.

Paper comes from...

6.

Which one is a structure?

7.

Which tower is hardest to knock over?

8.

Which fastener is best for a shoe you take off every day?

9.

Which is the best way to reduce waste?

10.

Inuit built igloos from...

For parents and teachers

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

  • Mixes up objects and materials, or can't describe with the senses: revisit Objects and the Materials They Are Made Of and repeat the scavenger hunt.
  • Can't explain why a material is used, or mixes up absorbent and waterproof: revisit Choosing the Right Material for the Job and redo the soak-it-up test.
  • Doesn't know where materials come from, or can't compare objects with the same job: revisit Where Do Materials Come From?
  • Calls every object a structure, or confuses load and structure: revisit Structures: Built to Hold a Load and try the book stand challenge again.
  • Can't name fasteners or picks glue for a coat: revisit Fasteners: Holding Things Together and do the fastener hunt while getting dressed.
  • Mixes up reduce, reuse and recycle: revisit Less Waste: Reduce, Reuse, Recycle and run the family waste plan for a week.

A few mistakes are normal. Praise reasons that use properties, careful observing, and good ideas for improving designs.