Transcript Core Chemistry Big Teach 1: The Atmosphere

Core Chemistry Big Teach 1: Materials From
the Earth
Key terms used in exam questions
•Quary – Where we dig limestone
Rocks
Sedimentary
Metamorphic
Igneous
Examples: Chalk and Limestone
Examples: Marble
Examples: Granite
How was it formed?
How is it formed?
How is it cooled
• Sediments fall to bottom of
the sea
• Over millions of years
• Layers compact
• Rock formed
• Sedimentary rocks are put
under heat and pressure
• When Lava cools
Things to know:
• They contain fossils
• They erode easily
Things to Know
Things to know
• Limestone turns into
Marble
• The heat comes from the
magma
• Marble turns into granite
• If the lave cools quickly it
contains small crystals
• If it cools slowly It contains
large crystals
Questions
Answers
The Limestone Cycle
Solution goes
cloudy
You can use this diagram to answer any exam
questions:
Calcium Carbonate
e.g: word equations
Water
Carbon dioxide
Hissing, steam,
solid crumbles
into a powder
Calcium Oxide
Carbon Dioxide
Water
Remember – They are all the same thing
Limestone
Calcium Carbonate
CaCO3
Remember – They are all the same thing
Limewater
Calcium Hydroxide
Ca(OH)2
Remember – The Test for carbon dioxide
•Bubble the gas through
limewater
•Lime water goes cloudy
Calcium Carbonate – The neutraliser
• Why is it sprayed onto fields
Neutralise acidic soil
• Why is it sprayed onto waste gases from chimneys
Neutralise acidic waste gases
• Why is it taken as an indigestion remedy
Neutralise excess acid in stomach
Questions
Answers
Advantages of a limestone quary Disadvantages of a limestone quary
Social (people
living in the local
area)
Provides jobs
Noisy
Dusty
Evironmental
After its use it can be
turned into a lake
Damages habitats
Economic
(money)
Limestone is a valuable
resource
Loss of tourism