Limestone Flashcards
1
Q
what is limestone often formed from?
A
sea shells
2
Q
what is limestone made into?
A
- building blocks
- cathedrals
3
Q
is limestone sturdy?
A
yes
4
Q
when limestone is heated, what happens?
A
thermally decomposes to make calcium oxide + carbon dioxide
5
Q
how is calcium hydroxide produced?
A
by calcium oxide and water reacting
6
Q
what 3 things can limestone be made into, and how?
A
- powdered limestone + powdered clay heated in a kiln ➡️Cement
- cement mixed with sand + water➡️Mortar
- cement with sand + aggregate➡️Concrete
7
Q
what is aggregate?
A
water and gravel
8
Q
what are the bad things about quarrying limestone?
A
- large ugly holes
- noise
- dust
- destroys habitats
- transport = more noise + pollution
9
Q
what are some good things about limestone?
A
- provides houses and roads
- jobs
- money = better for local economy
- widely available
- doesn’t rot
- fire-resistant
