Fuels

Question 1

Fuels

Answer 1

Substances that have chemical energy stored within them, which can easily be released, fuels provide us with energy

Question 2

Fossil fuels

Answer 2

A natural fuel formed from the ancient plants and animals that were decomposed under the Earth’s surface over millions of years ago

Question 3

Advantages of fossil fuels

Answer 3

• Cheap
• High purity
• Formed from fossilised remains of plants and animals.

Question 4

Disadvantages of Fossil Fuels

Answer 4

• Non renewable
• Have a high carbon footprint.
• Takes millions of years to produce.

Question 5

Coal

Answer 5

Type of fossil fuel made from Carbon, hydrogen, nitrogen, sulfur

As wood turns into coal, chemical changes occur.

about 50% of carbon is in wood

carbon content is increased, hydrogen and oxygen content is decreased.

Question 6

Natural Gas

Answer 6

Type of fossil fuel made from water, sulfur, nitrogen and carbon dioxide.

Deposited in the crust, mainly composed of methane

Question 7

Creud oil

Answer 7

Mixture of hydrocarbons that are mainly alkanes

Question 8

Biofuels

Answer 8

Fuels that can be made from bio-mass such as crops, wood or organic food material, created from living or recently dead materials

Question 9

Advantages of Biofuels

Answer 9

• Replenished in a short time.
• renewable
• formed from biomaterial
• Lower carbon footprint
• more sustainable and eco friendly

Question 10

Disadvantages of Biofuels

Answer 10

• Expensive
• Lower purity
• Slower production process (needs more refining)

Question 11

Bioethanol

Answer 11

Type of biofuel, that is a type of alcohol made by fermenting sugars from plants, mainly used as fuels for cars.

Question 12

Biogas

Answer 12

Made when bacteria breaks down waste material like food sraps, manure or sewage in places without oxygen

Question 13

Biodiesel

Answer 13

Fuel made from natural oils and fats, like vegetable oils or animal fat.

It can power diesel engines.