Index
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Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Check
Across:
1.
Colourless and poisonous gas
3.
These resources will run out.
4.
Basic unit of a substance, consisting of two or more atoms
6.
Gas from rotting waste
7.
Building blocks of living cells
8.
Purifying a liquid by evaporation then condensation against a cold surface.
10.
Liquid fats
11.
Gives us heat energy
12.
Fashionable colour
13.
You can run a lorry or bus on this fuel
15.
Fuels with some biological product
16.
Natural chemical compounds
17.
Smallest alkane
Down:
2.
Can be broken down by micro-organisms
5.
Gooey
9.
Unwanted substances in something else
14.
It dissolves
OK
Index
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