Chemical Changes Crossword Puzzle

QUESTIONS LIST:

• gas: something that can escape a boiling tube during a reaction, making the products appear to have a lower mass than the reactants.
• thermal: a word related to heat. together with clue 11 it makes a type of chemical reaction.
• decomposition: taking something apart or breaking it down. together with clue 7 it makes a type of chemical reaction.
• displacement: a type of chemical reaction where a more reactive element takes the place of a less reactive element in a compound.
• carbon: one of the non-metals in clue 6. metals less reactive than this element can be extracted from their ores with charcoal.
• hydrogen: one of the non-metals in clue 6. metals more reactive than this element will react with acids to form metal compounds.
• reactivity series: a way of arranging elements in order of their reactivity, with more reactive elements nearer the top.
• jewellery: the least reactive metals are useful for making this, as they won't react with skin.
• alkali metals: the most reactive metals tend to belong to this group, aka group 1.
• fizzing: one of the signs a chemical change is happening. it happens when a gas is produced in a liquid.
• aroma: one of the signs a chemical change is happening. to detect it, wave your hand at the end of a boiling tube and sniff.
• temperature: something that might change during a chemical change. you'd measure it with a thermometer.
• physical: a type of change that is often reversible and doesn't involve a new substance being made.
• arrow: what a chemical equation has instead of an equals sign.
• mass: something that is always conserved when a chemical reaction happens.
• reactant: one of the substances present before a chemical reaction happens.
• product: one of the substances made during a chemical reaction.