C1 Knowledge Test
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Where did the gases that formed the Earths early atmosphere come from?
How much oxygen was present in the Earths early atmosphere?
How much CO2 was present in the Earths early atmosphere?
Name 4 other gases present in the Earth’s early atmosphere.
Describe two ways that the carbon dioxide levels in the early atmosphere were reduced.
What mineral is limestone made from?
How did photosynthesis affect the composition of the atmosphere?
Complete this table to show the current composition of the Earths atmosphere:
Gas
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Formula
% in dry air
What 2 main gases do volcanoes release in to the atmosphere
What effect does deforestation have on the amount of carbon dioxide in the atmosphere.
Name an igneous rock
What are igneous rocks formed from?
What affects the size of crystals in in igneous rock?
Name 2 sedimentary rocks
How are sedimentary rocks formed?
Which type of rock may contain fossils?
What type of rock is marble?
What two factors are required to form metamorphic rock?
Chalk, limestone and marble are all made of which mineral?
Calcium carbonate is mined to form which three everyday items?
Give two disadvantages of quarrying limestone
Give one advantage of quarrying limestone
Write a word equation for the thermal decomposition of limestone
What can you say about the mass of reactants and the mass of products in a reaction?
Write a word equation for the reaction between water and calcium oxide.
What is formed when calcium hydroxide is dissolved in water?
Give 2 uses of calcium carbonate in industry.
Write a word equation for the reaction between hydrochloric acid and calcium carbonate
What process decomposes compounds using an electrical current?
How do we test for Hydrogen?
How do we test for chlorine?
How can chlorine be extracted from seawater?
Name two substances produced from chlorine.
What is produced during the electrolysis of water?
How do we test for oxygen?
Describe two ways of extracting metals from their ores.
Name the top two and bottom two metals in the reactivity series
Which part of the reactivity series contains metals least likely to corrode?
Why is gold used for jewellery?
What is an alloy?
Why is iron often alloyed?
42. Crude oil is a mixture of…
43. What is the purpose of fractional distillation?
44. Complete this table to give a use of each of these fractions:
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Fraction
Use
Gases
petrol
Kerosene
Diesel oil
Fuel oil
Bitumen
What happens to the boiling point of the fractions as they get longer?
Write a word equation for the combustion of a hydrocarbon.
How do we test for carbon dioxide?
What two different substances does incomplete combustion produce as compared to complete combustion?
What gas is produced due to the impurities in fossil fuels?
Name 3 greenhouse gases.
What is ethanol produced from?
Give 4 factors of a good fuel.
How do we test for the presence of alkenes?
What process breaks down large hydrocarbons?
What substance is formed from the polymerisation of ethane?