Year 2

Why do we change materials?

In this lesson, we will be learning about why we change materials. You will learn how raw materials can be changed to make synthetic materials and you will think about how the properties of these materials are different before and after the change.

Year 2

Why do we change materials?

In this lesson, we will be learning about why we change materials. You will learn how raw materials can be changed to make synthetic materials and you will think about how the properties of these materials are different before and after the change.

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Lesson details

Key learning points

  1. Comparing the properties of raw vs synthetic materials
  2. Examples of material scientists

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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4 Questions

Q1.
A raw material is...
Correct answer: A material found in nature that has not been changed by humans.
A material that has been made by humans.
Q2.
Synthetic materials are often made from raw materials. True or false?
False.
Correct answer: True.
Q3.
Tick the raw material in the following list.
Brick.
Plastic.
Correct answer: Wool.
Q4.
Tick the synthetic material in the following list.
Correct answer: Paper.
Sand.
Wood.

4 Questions

Q1.
Which synthetic material is made from sand?
Correct answer: Glass.
Paper
Plastic.
Q2.
In order to make glass, sand is often mixed with other raw materials. What happens to it after this?
It is cooled.
Correct answer: It is heated.
Q3.
Why is glass a good material for a window?
It feels nice.
It is shiny.
Correct answer: It is transparent.
Q4.
What did Stephanie Kwolek invent?
Correct answer: Kevlar.
Steel.