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what was the Earths original surface?
molten for millions of years.
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True or False volcanoes stopped errupting?
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what 3 gases did the volcanoes give out?
Carbon Dioxide, Water vapour and Nitrogen.
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What did the early atmosphere virtually not have?
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the oceans formed when the.............. ................. condensed when the Earth cooled.
Water vapour.
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Green plants evolved over most of the Earth. they were quite happy in the.........atmosphere.
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alot of the early CO2 dissolved into the oceans. The green plants also removed CO2 from the air and produced O2 by..........................
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when plants died and were buried under layers of sediment, the carbon they had removed the air(as CO2) became 'locked up' in............................ ................. as ............................ ........................... and fossil fuels.
sedimentary rocks, insoluble carbonates.
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In the atmosphere, what killed off some early Organisms?
The build up of Oxygen.
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When complex Organisms evolved what gas was virtually none left?
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What is the blue haze surrounding the Earth?
The atmosphere.
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What is the Atmosphere mostly made up of?
Nitrogen, Oxygen and Argon
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What are the percentages of amounts of the gases in the atmosphere?
Nitrogen 78%, Oxygen 21% and Argon 1%. Carbon dioxide-small amounts, varying amounts of water vapour.
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What is a Pollutant?
a chemical that's harmful because it's in the 'wrong place'.
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What are Particulates?
Tiny particles that are in the air.
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Human activity is adding small amounts of pollutants to the air. Name 3 Pollutants.
Carbon dioxide, Carbon monoxide, Particulates, Sulfur dioxide, Nitrogen Oxides.
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Name 3 ways of pollution.
burning fuels, power station and vehicles.
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How can gases and particulates also be released?
Nature eg volcanoes.
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What does Sulfur Dioxide cause?
Acid rain.
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why is Acid rain harmful to the environment?
It can pollute rivers and kill fish, whch people catch and eat.
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Pollutants like carbon dioxide are leading to climate change, what problems can this lead to?
Rising sea levels and disruption to farming.
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What fuels are burnt to release energy?
fossil fuels.
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what do we use fossil fuels for?
Energy- to power vehicles, to produce electricity in power stations.
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What elment does fossil fuels contain large amounts of?
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If theres not much oxygen available like in a car engine, what can this produce?
Carbon Monoxide, because their's not enough oxygen
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How can CO2 be removed from the atmosphere naturally?
plants use the CO2 up when they photosynthesis, CO2 also dissolves in seas lakes and rivers.
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What is the effect of CO2 in the atmosphere?
It is a greenhouse gas, which contributes to global warming. This can have an indirect affect on humans because it damages our environment.
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How is Carbon Monoxide formed?
When there is not enough oxygen to be burned, this is called incomplete combustion.
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What is Particulate Carbon?
Tiny particulates produced when fuels burn incompletely, called soot.
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when atoms join together what are they called?
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What are reactants?
These are the atoms from the substances you start off with.
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What are products?
The rearrangement of the different chemicals, the end result
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In chemical reaction what is the only thing that will stay the same?
Mass, the atoms get shuffled about but they're all still there.
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What differs between the products and reactants?
Properties, eg Carbon dioxide is different from when it was just Carbon and Oxygen on its own.
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The majority of fuels we use contain just 2 elements, what are these elements?
Carbon and Hydrogen, making Hydrocarbons.
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What are Hydrocarbons?
Fossil fuels.
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What oils are drilled out of the Earth?
Crude oil
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What is Crude oil used for?
Petrol and Diesel for cars.
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what is Oxidation?
Any reaction with oxygen added.
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Where does Sulfur Dioxide usually end up?
In the atmosphere.
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How is Sulfur dioxide produced?
When power stations and vehicle engines burn fossil fuels like coal and petrol.
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Nitrogen in the air reacts with the oxygen in the air to produce small amounts of compounds known as what?
Nitrogen Oxides, Nitrogen Monoxide, and Nitrogen Dioxide
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How can we reduce air pollution?
Power stations, from our cars, less fossil fuels being used.
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What is a catalytic convertors job?
It converts harmful nitrogen monoxide into harmless nitrogen and oxygen. This is an example of a reduction reaction- the nitrogen loses oxygen.
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what are Bio fuels?
A renewable energy resource
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What are biofuels made of?
plants and waste
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What are biofuels good for?
The environment as they only produce Carbon Dioxide and water when burned.
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What are the disadvantages of using Biofuels?
some cases may result in species losing their natural habitats.
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Card 2


True or False volcanoes stopped errupting?



Card 3


what 3 gases did the volcanoes give out?


Preview of the front of card 3

Card 4


What did the early atmosphere virtually not have?


Preview of the front of card 4

Card 5


the oceans formed when the.............. ................. condensed when the Earth cooled.


Preview of the front of card 5
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