WorksheetsComposites and balancing equations
Total questions: 10
Worksheet time: 5mins
Why is it harder to recycle composites?
They are too hard.
They need more energy to melt.
The materials in the mixture need to be separated.
They are too heavy to carry
Which of the following is a composite?
Iron
Nickel
Cobalt
Steel
Why is it a disadvantage for a material to have a high density?
It makes it heavier
It makes it weaker
It makes it bigger
It makes it smaller
What is the name given to the process where acids and other substances wear down a substance?
Respiration
Reduction
Corrosion
Combustion
What do we call a metal mixed with another metal or carbon?
Solution
Alloy
Aggregate
Compound
What is added to concrete to reinforce it?
Carbon
Polyethylene
Polyester resin
Steel
Why are pure metals not used for most jobs that require metals?
Too soft
Too expensive
Too heavy
Too hard
What should go in front of H2O?
1
2
3
4
What should go in front of H2?
1
2
3
4
What should go in front of CO2?
1
2
3
4
