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The Earth's Resources: Atmosphere
A thin layer of gases surrounding the atmosphere made up of elements e.g. Oxygen, Nitrogen and traces of Argon and compounds e.g. H20+C02.
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The Earth's Resources: Hydrosphere
All the water on the Earth contains dissolved compounds.
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The Earth's Resources: Lithosphere
The ridged layer of Earth made up of the crust and the part of the mantle just below it. It is a mixture of minerals e.g. oxygen, silicon, aluminium and silicon dioxide.
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Chemicals of the Atmosphere: What do they consist of?
Chemicals that make up the atmosphere consist of non-metal elements and molecule compounds made up from non-metal elements.
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Chemicals of the Atmosphere: What temperature are gases in the atmosphere?
Gases in the atmosphere are at 20(degrees) because they have very low boiling points. This can be explained by looking at the structure of the molecules.
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Chemicals of the Atmosphere: Molecular Compounds
Molecular compounds have strong covalent bonds between the atoms that make up the compound but weak forces of attraction between the small molecules.
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Chemicals of the Atmosphere: What are atoms within molecules connected with?
Atoms within molecules are connected by strong covalent bonds (e.g. hydrogen)
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Identification of Ions:
Ions are ionic compounds that can be detected as they have distinct properties and they form chemicals. An insoluble compound may precipitate on mixing two solutions of ionic compounds. This is used to identify metal ions.
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What is an ore?
An ore is a rock that contains enough of a mineral (metal compound) for the metal to be extracted from it. Most metals are extracted from an ore by reduction with carbon or by electrolysis.
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Extraction using carbon:
Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal. The metal oxide loses oxygen, and is therefore reduced. The carbon gains oxygen, and therefore is oxidised.
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Other cards in this set

Card 2

Front

All the water on the Earth contains dissolved compounds.

Back

The Earth's Resources: Hydrosphere

Card 3

Front

The ridged layer of Earth made up of the crust and the part of the mantle just below it. It is a mixture of minerals e.g. oxygen, silicon, aluminium and silicon dioxide.

Back

Preview of the back of card 3

Card 4

Front

Chemicals that make up the atmosphere consist of non-metal elements and molecule compounds made up from non-metal elements.

Back

Preview of the back of card 4

Card 5

Front

Gases in the atmosphere are at 20(degrees) because they have very low boiling points. This can be explained by looking at the structure of the molecules.

Back

Preview of the back of card 5
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