C15(Using Our Resources)

Question 1

What is rusting

Answer 1

The corrosion of iron

Question 2

Oxygen and water are needed for iron to ..

Answer 2

Rust

Question 3

How do you prevent rusting

Answer 3

Provide a barrier between iron and any oxygen and water

Question 4

What is sacrificial protection

Answer 4

Attaching metals that are more reactive than iron on iron to stop it from rusting

Question 5

Alloys are harder than pure metals because …

Answer 5

The regular layers in a pure metal are distorted by differently sized atoms in an alloy

Question 6

How are steel alloys formed

Answer 6

Carefully controlled quantities of carbon and other elements are added to iron

Question 7

What are the examples of steels

Answer 7

-high carbon steels- which are hard but brittle
-low carbon steels- which are softer and easily shaped
-stainless steels- which are resistant to corrosion

Question 8

Monomers affect the properties of …

Answer 8

The polymers that they produce

Question 9

Changing reaction conditions can …

Answer 9

Change the properties of the polymer that is produced

Question 10

What are thermosoftening polymers

Answer 10

Polymers that will soften or melt easily when heated because their intermolecular forces are weak

Question 11

What are thermosetting polymers

Answer 11

Polymers that do not soften because of their cross linking but will eventually char if heated very strongly