Chemical Changes Flashcards
1
Q
What happens in a chemical reaction?
A
In a chemical reaction at least one new substance is always formed
2
Q
What is an example if a chemical reaction?
A
A metal fence rusting
Skin forming over a cut
Gas burning in a fire
3
Q
What are signs of a chemical reaction?
A
Colour change Smell Effervescence- fizzing Heat given out Heat taken in
4
Q
What does endothermic mean?
A
Reactions which take energy in are endothermic
5
Q
What does exothermic mean?
A
Reactions which give out energy are exothermic
