Lesson 3
How can changing materials from solid to liquid be useful?
Home > Private: *ARCHIVE Year 3 Science – Focus Group > Unit 2 – Chemical Sciences > Lesson 3 – How can changing materials from solid to liquid be useful?
Lesson Plan
Preparation
- Gather some of the examples of the materials discussed on the student summary i.e. glass, steel, aluminium, plastic.
- Students will need access to the internet and other reference material to complete the research activity on investigation sheet.
Curriculum links
- Australian Curriculum: ACSSU046, ACSHE051, ACSIS054, ACSIS055, ACSIS060
- NSW Curriculum: ST2-6MW-S, ST2-10ES-S, ST2-1WS-S
- VIC Curriculum: VCSSU056, VCSSU059, VCSIS066, VCSIS067, VCSIS068, VCSIS072
- WA Curriculum: ACSSU046, ACSHE051, ACSIS054, ACSIS055, ACSIS060
Suggested teaching strategies
- Collaborative learning strategies
Introduction
- Provide some of the examples of the materials discussed in the student summary for the class to examine i.e. glass, steel, aluminium and plastic.
- Students will need access to the internet and other reference material complete the research activity on the investigation sheet.
- The student summary and worksheet should be used together.
Development
- Provide students with printable versions of the student summary and worksheet. Have students complete the worksheet. Students can work in a small group for the activity on the worksheet.
- Suggestions for solid and liquid materials for them to investigate could include: car batteries; outdated medicines; cooking oil; paint; specific or general cleaning products such as varnish and bleach; asbestos; electronic goods such as computers, tyres; mobile phones and televisions; glass; metal; cars and other vehicles; pesticides; boat flares; gas cylinders; pool chemicals.
Differentiation
- Groups for investigation sheet could be arranged based on student ability.
Conclusion
- With assistance, students work out how to present their research to the class or small group. Compare and discuss the information found about the same materials.
Assessment
Worksheet answers
1. Teacher check
2. Answers should indicate that when gold is mined it can be heated to become a liquid and poured into moulds to make ingots of a set size. These are easier to buy and transport. Ingots can be melted again to make gold products.
3. (a) plastic: Teacher check examples (b) steel: Teacher check examples (c) aluminium: Teacher check examples (d) glass: Teacher check examples
4. Teacher check
5. Teacher check
Science as a Human Endeavour question
Teacher check
Investigation sheet answers
Teacher check
Student Pages







from solid to liquid be useful?
from solid to liquid be useful?
There are reasons people in different jobs change materials from liquid to solid and solid to liquid.
Think about people who work with a metal such as gold.



This makes it easier for manufacturers to buy and transport.
The ingot will be melted again before being made into jewellery, coins, caps for teeth and so on.


Did you know that changing solids to liquids and liquids to solids is also very useful for recycling may materials?
Here’s how this characteristic helps four different kinds of materials to be recycled.



Glass
Glass bottles and jars have metal lids removed and stickers taken off the outside.
Then they are crushed and sent as solid pieces to a glass factory.


The liquid metal is poured into moulds and left to become solid.
A machine cuts it into large pieces to be sent to various factories to make new steel products such as tools and car parts.



Plastic
Plastic bottles are sorted into different types then squashed into bales.
A machine cuts them into flakes.


These are cleaned, melted down, then made into new plastic items such as garden chairs, bottles and bins.

Downloads

Student Summary
Summary of student page information

Worksheet
Activities for students to complete

Investigation Worksheet
An experiment to consolidate learnings