C1 2 Rocks & building materials - answers
Across
1. A white solid made by reacting calcium oxide with water. It is used as a cheap
alkali in industry. Calcium hydroxide
4. The main compound found in limestone. It is a white solid whose formula is
CaCO3. Calcium carbonate
6. A building material used to bind bricks together. It is made by mixing cement
with sand and water. mortar
7. The breakdown of a compound by heat. Thermal decomposition
8. A building material made by heating limestone and clay. cement
Down
2. The common name for calcium hydroxide solution. limewater
3. A white solid made by heating limestone strongly, for example in a lime kiln.
Calcium oxide
5. A building material made by mixing cement, sand and aggregate (crushed rock)
with water. concrete
Dr Barker 2011