Rock And Building Materials

Question 1

How is cement made?

Answer 1

Limestone, clay and sand are heated in a kiln

Question 2

How to make concrete?

Answer 2

Cement, sand, aggregate and water

Question 3

What is thermal decomposition

Answer 3

Breaking down by heating

Question 4

What do metal carbonates decompose

Answer 4

Metal oxide and carbon dioxide

Question 5

Carbonates react with acid to produce a _________ ?

Answer 5

Salt

Water and CO2

Question 6

Explain the limestone reaction cycle

Answer 6

Calcium carbonate (limestone) –> HEAT –> Calcium oxide (and carbon dioxide) –> ADD WATER —> Calcium hydroxide —> ADD MORE WATER AND FILTER —> Calcium hydroxide solution (limewater) –> CO2 –> back to limestone

Question 7

How to make mortar

Answer 7

Cement, sand and water

Question 8

Give 2 advantages and disadvantages of limestone quarrying

Answer 8

A: more employment, improved roads, more trade from businesses

D: dust and noise, traffic, loss of habitats