☰ Year plan · Science

Gold, recycling and lab safety

Week 14 · Chapter 10: exercises and Review & Practice; Column: The Science of Change; Lab Safety and Professional Tools · 3 lessons
2

Reusing metals: recycling and recovery

Science P6: Term 1, Chapter 10, pp. 86–91
GoalShow how recycling and recovering metals saves resources and reduces waste.
New words
recycle · to turn used things into new thingsresource · something we use, like metal or waterwaste · things we throw away
Explanation

A metal does not disappear when it reacts. Its parts are still there, in a new form. Metal can also be melted and used again. Recycling means collecting old metal things, such as drink cans, old pans and bicycle parts, and making new things from them. This saves energy, because making a thing from old metal needs much less energy than making it from ore dug out of the ground, and it reduces waste, because less goes to the rubbish. Some factories also use evaporation to get a pure solid back out of a liquid. We can help at home: keep metal separate from other rubbish, give old metal to a collector, and fix things instead of throwing them away. Egypt’s future can be greener when we reuse resources.

Worked examples
old canrecyclingnew can
Youssef’s family keeps old cans in a bag. A collector takes them, and they will become new metal.
WordMeaningExample
reduceuse lessbring a refillable bottle
reuseuse againmend a pan
recyclemake new thingsmetal to a collector
Marina’s class makes a poster: reduce, reuse, recycle. Reduce means use less, reuse means use again, recycle means make into something new.
A scrap collector on a street takes old metal. The metal goes to a workshop and is not lost.
Class activity

Metal count. For one week, a grown-up and you keep a list of metal things your family throws away or gives away. Draw a bar chart with four bars: cans, tins, old pans, other. What could be recycled or mended?

Practice
1
What does recycling mean?
2
Why does recycling metal save energy?
3
Name one thing you can do at home to help.
4
Write reduce, reuse or recycle: mending a broken toy.