MEDIUM
MYP:4-5
IMPORTANT
Earn 100

List similarities between phlogiston theory and the modern understanding of oxidation.

Important Questions on How Can Our Energy Resources Be Accessed Fairly?
MEDIUM
MYP:4-5
IMPORTANT
Identify examples of scientific ideas that have changed through time. What caused these ideas to change?

MEDIUM
MYP:4-5
IMPORTANT
Suggest a reply to the judge's claim that 'The Republic has no need of men of science'. Would a person living in an isolated, remote region of the world, whose energy needs are entirely based on biomass, appreciate your argument?

HARD
MYP:4-5
IMPORTANT
Complete the following table.
Flammable substance | Flash point | Boiling point |
Benzene | ||
Butane | ||
Ethanol | ||
Propan-1-ol | ||
Ethoxyethane (ether) | ||
Glycerine | ||
Paraffin | ||
Petrol | ||
Diesel | ||
White spirit |

MEDIUM
MYP:4-5
IMPORTANT
Suggest why petrol, white spirit and paraffin have ranges for their flash points and boiling point?

MEDIUM
MYP:4-5
IMPORTANT
Explain, with reference to intermolecular forces and changes of state, the relationship between flash point and boiling point.

MEDIUM
MYP:4-5
IMPORTANT
Suggest why is it more dangerous to be trapped in a bushfire (wildfire) in a car with a nearly empty petrol tank than one that is nearly full of fuel.

HARD
MYP:4-5
IMPORTANT
What is the role of the choke and carburettor in the combustion of fuel in a vintage car? How does 'tuning' a car engine reduce the percentage of carbon monoxide present in a vehicle's exhaust gases?

MEDIUM
MYP:4-5
IMPORTANT
List six examples of fuels your family used during the year and mention where it is used.
