Corrosion & Combustion

Question 1

Corrosion

Answer 1

Chemical property
Refers to the slow chemical change that occurs when a metal reacts with oxygen from the air to form a new substance called an oxide

Question 2

3 types of corrosion

Answer 2

Rusting
Aluminum
Silver

Question 3

Rusting

Answer 3

The reaction of iron with oxygen to form iron oxide
Porous nature which enables it to absorb water like a sponge
As a result, it dissolves or flakes off leaving another layer of fresh metal underneath to be attacked by oxygen
This process continues until the rust has eaten its way through the metal

Question 4

Preventing Corrosion

Answer 4

1) Paint the surface of the metal
2) Attaching another metal that is easier to corrode than iron
3) Using a special alloy of steel (made by mixing iron with nickel and copper)
4) Use material that have different chemical properties

Question 5

Combustion

Answer 5

A chemical reaction where a substance reacts rapidly with oxygen and releases energy (heat and light)

Question 6

3 necessary components of combustion

Answer 6

Oxygen, Fuel and Heat

Question 7

Fossil Fuels

Answer 7

Formed from plants, animals, and microorganisms that lives millions of years ago
Fossil fuels are a mix of other substances and sometimes combustion is not efficient due to a lack of oxygen or heat.
Coal, oil, natural gas

Question 8

Hydrocarbons

Answer 8

The particles that make up fossil fuels