C13 Carbonates

Question 1

Physical weathering

Answer 1

Erosion due to rain, wind, freezing, and thawing, heating and cooling

Question 2

Chemical weathering

Answer 2

Rocks break apart due to a chemical process such as a reaction with water

Question 3

Limestone

Answer 3

A form of calcium carbonate

Question 4

Lime

Answer 4

Calcium oxide. AKA quicklime. Formed by decomposing limestone. Used to neutralise acidic soil

Question 5

Thermal decomposition

Answer 5

Breaking down of a compound using heat

Question 6

Sedimentary rock

Answer 6

Rock formed from sediment that was compressed

Question 7

Igneous rock

Answer 7

Rock formed from magma (molten rock)

Question 8

Metamorphic rock

Answer 8

Rock formed as a result of heat and pressure

Question 9

Limestone cycle

Answer 9

Limestone (calcium carbonate) + heat gives quicklime (calcium oxide)
Quicklime + water gives Slaked lime( calcium hydroxide)
Slacked lime + carbon dioxide gives limestone and so on and so forth

Question 10

Word equation for reaction in a lime kiln

Answer 10

Calcium carbonate–(heat)–> calcium oxide+ carbon dioxide

Question 11

Symbol equation for reaction in a lime kiln

Answer 11

CaCO3 –(heat)–> Cao + CO2

Question 12

Slaked lime

Answer 12

AKA calcium hydroxide. It neutralizes acids and is slightly alkaline

Question 13

Weathering

Answer 13

Erosion of rock/ breaking up the rock into smaller pieces