Chemical change

Question 1

Physical change

Answer 1

When the appearance of an object is altered but its chemical composition stays the same

Question 2

Chemical change

Answer 2

when the chemical composition is being altered on an object. Most of the time this will alter its appearance as well.

Question 3

flammability

Answer 3

flammability is an indicator of how easily a substance catches fire

Question 4

reactivity

Answer 4

reactivity is a measure of how likely a particular metal is to take part in a displacement reaction

Question 5

toxicity

Answer 5

toxicity is the danger to your health caused when poisonous substances combine with chemicals in your body to produce new substances and damaging effects

Question 6

chemical reaction

Answer 6

chemical reaction is a chemical change in which one or more new chemical substances are produced

Question 7

reactants

Answer 7

reactants are a chemical substance used up in a chemical reaction. Some chemical bonds in a reactant are broken during the reaction.

Question 8

products

Answer 8

products are a new chemical substance that results from a chemical reaction

Question 9

precipitate

Answer 9

precipitate is a solid product of a chemical reaction that does not dissolve in water

Question 10

reaction rate

Answer 10

reaction rate is the speed at which a reaction takes place

Question 11

catalyst

Answer 11

catalyst is a chemical that helps to start or speed up a chemical reaction