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12 questions
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- 1. Multiple-choice30 seconds1 pt
Why iron is used for building houses?
it is shiny
it is malleable
it is strong and tough
it is ductile
- 2. Multiple-choice30 seconds1 pt
Which property of metal makes ringing sound when hit?
sonorous
ductile
malleable
strong and tough
- 3. Multiple-choice30 seconds1 pt
Why copper is used in electrical wiring?
shiny
good conductor of heat
good conductor of electricity
ductile
- 4. Multiple-choice30 seconds1 pt
Which is NOT a magnetic metal?
iron
gold
steel
nickel
- 5. Multiple-choice30 seconds1 pt
The property of metals drawn out into wires is called _____
sonorous
magnetic
malleable
ductile
- 6. Multiple-choice30 seconds1 pt
Why non-metals are used to make coverings for electrical plugs and cables?
good conductor
good insulator
strongly acidic
weakly alkali
- 7. Multiple-choice30 seconds1 pt
Why wedding rings are not made from pure gold?
pure gold is too soft and gets lots of wear and tear
pure gold is so expensive and will fade its luster
- 8. Multiple-choice30 seconds1 pt
Why aeroplanes are not made from pure aluminium
it is noisy to fly
it is very light and easily blown by the wind
not strong enough and that wings of the plane may fall
it easily get rusty
- 9. Open-ended3 minutes2 pts
"Alloy is a compound. "
Is this statement correct? Explain your answer briefly
- 10. Open-ended3 minutes1 pt
Identify this hazard symbol
- 11. Open-ended3 minutes1 pt
Identify this hazard symbol
- 12. Open-ended3 minutes2 pts
This symbol means corrosive. Explain what is corrosive?
