C2 4.7 Recycling Flashcards
1
Q
What does recycling mean?
A
Collecting and processing materials that have been used so that they can be used again
2
Q
Give two advantages of recycling
A
Resources such as aluminium will last longer; energy is saved because it takes less energy to recycle than to extract resources; waste and pollution is reduced
3
Q
Give a disadvantage of recycling
A
Separating rubbish is a nuisance; lorries that collect recycling use fuel and create pollution
4
Q
What is an independent variable?
A
A variable that you can control
5
Q
What is a dependent variable?
A
A variable that changes when you change something else
6
Q
What is the variable called that must be kept the same throughout an experiment?
A
Control variable
