Chemical reactions · Puzzle
Crossword
9 clues from this topic’s key words.
Tap a square, then tap the letters under the grid. Tap the square again to change between across and down.
1 2 3 4 5 6 7 8 9
Across 1 A clear solution that carbon dioxide turns cloudy (9)4 Gives out energy, so the surroundings get hotter (10)6 A substance that stores energy and is burned to release it (4)8 Speeds up a reaction and is not used up (8)9 A compound of hydrogen and carbon only, such as methane (11)Down 2 Shows a reaction using the names of the substances (4,8)3 A compound of an element joined with oxygen (5)5 Burning: a reaction with oxygen that gives out heat and light (10)7 A substance you start with in a reaction (8)Answers 1 across : A clear solution that carbon dioxide turns cloudy. Limewater 2 down : Shows a reaction using the names of the substances. Word equation 3 down : A compound of an element joined with oxygen. Oxide 4 across : Gives out energy, so the surroundings get hotter. Exothermic 5 down : Burning: a reaction with oxygen that gives out heat and light. Combustion 6 across : A substance that stores energy and is burned to release it. Fuel 7 down : A substance you start with in a reaction. Reactant 8 across : Speeds up a reaction and is not used up. Catalyst 9 across : A compound of hydrogen and carbon only, such as methane. Hydrocarbon The worksheet The same crossword as a worksheet to print.
The Chemical reactions puzzle booklet has the topic’s puzzles and every lesson’s, with their answers. This worksheet is page 2, and its answers are on page 3.
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