Crude oil

Question 1

Crude oil

Answer 1

Crude oil is a non-renewable (finite) resource.

Question 2

Most compounds are hydrocarbons

Answer 2

Hydrocarbons are molecules made up of only hydrogen and carbon atoms.
Hydrocarbons differ in their size, which can change the properties of the hydrocarbon.

Question 3

Mixture of compounds

Answer 3

Crude oil is a mixture of lots of different compounds that are not chemically combined.
Most of the compounds in crude oil are hydrocarbons.

Question 4

Found in rocks

Answer 4

Crude oil is found in rocks and is used to produce fuels and other important chemicals.

Question 5

Fossilised plankton

Answer 5

Crude oil is formed from the fossilised remains of ancient plankton.

Question 6

Heavy Fractions of Crude Oil

Answer 6

Heavy fractions of crude oil do not make good fuels because they:

Question 7

Don’t ignite easily

Have high boiling points

Have low volatility

Question 8

Heavy fractions of crude oil don’t make good fuels because they do not ignite easily, have high boiling points and a low volatility.

Question 9

What are most of the compounds in crude oil?

Answer 9

hydrocarbons