C1- Rocks and Building Materials Flashcards
Define thermal decomposition.
Breaking down by heating.
How is cement made?
Cement is made by heating limestone with clay in a kiln.
Why do we quarry such large amounts of limestone?
Limestone has many uses.
Blocks of limestone can be used for building; it is used to make calcium oxide and cement.
How is calcium oxide (quicklime) made?
Limestone goes through thermal decomposition; it is heated strongly and decomposes to make calcium oxide and CO2.
How do metal carbonates react when heated or reacted with acids?
Metal carbonates decompose to the metal oxide and CO2 when heated strongly.
All carbonates react with acids to produce a salt, water and CO2.
Describe how limewater can be used to measure how long it takes for carbon dioxide to be produced from copper carbonate (2 marks).
Time from when copper carbonate begins heating(1).
Limewater turns cloudy (1).
How is calcium hydroxide (slaked lime) made?
Calcium oxide (quicklime) reacts with water to produce calcium hydroxide.
What does calcium hydroxide (limewater) react with to produce calcium carbonate (limestone)?
Calcium hydroxide reacts with CO2 to produce calcium carbonate.
How is mortar made and used?
Mortar is made by mixing cement and sand with water.
Mortar is used to hold bricks and blocks together in buildings.
How is concrete made?
Concrete is made by mixing aggregate with cement, sand and water.
How is glass made?
Glass is made by heating a mixture of limestone, sand and soda until the mixture melts.
What are the advantages and disadvantages to quarrying limestone?
A- Limestone is depended on to provide building materials.
A- Quarrying provides more employment for local people.
A- Roads in local areas to quarrying are improved.
A- There are more customers and trade for local businesses.
D- Dust and noise.
D- More traffic.
D- Loss of habitats for wildlife.
What is limestone made up of and what type of rock is it?
Limestone is mainly made of calcium carbonate, CaCO3. It is a sedimentary rock.
