9E- Building materials

Question 1

Metal properties

Answer 1

@room temp are solids
Melting and boiling points are usually high
Good conductors of heat and electricity
Rigid when thick, bendy when thin
Malleable - can be hammered without cracking
Ductile can be stretched into thin wires
Only iron nickel and cobalt are magnetic

Question 2

Hydrochloric acid name and formula as a salt

Answer 2

HCl - chloride
Hsmall2SOsmall4 - sulphate
HNOsmall 3 - nitrate

Question 3

What is an alloy

Answer 3

A mixture of metals or metals mixed with other materials

Question 4

Why are metals malleable

Answer 4

Because they are elements and contain only one type of atom and their atoms line up in layers so when a force is applied the layers slide over each other and the block shape changes without breaking. In an alloy the mix of atoms makes it difficult for it to xxpalide across each other

Question 5

Iron oxide is

Answer 5

Crumble red flakes which is rust

Question 6

Our rain water ph

Acid rain ph

Answer 6

7 neutral

5.5 acidic

Question 7

Rocks metals and concret are what type of resources

Answer 7

Non renewable

Question 8

To build sustainably we need to

Answer 8

Re use materials form old buildings or use materials that have been recycled