​ A mixture ​ (a)   a chemical combining of substances.

• is not
• is

In a compound the ​ (a)   are ​ (b)   combined so that the elements that make up the compound ​ (c)   their identities and ​ (d)   take on a new set of properties

• molecules
• atoms
• chemically
• lose
• do
• physically
• retain
• do not

1.            From the following list of substances, identify the ones that are elements and compounds:

Groups:

(a) Element

,

(b) Compound

• gold

• Iron II oxide

• hydrochloric acid

• magnesium

• sugar

• sulfur

• salt

• water

• carbon

• sodium hydroxide

• carbon dioxide

• hydrogen

• Nitrogen

• oxygen

• silver

• Chromium

​ (a)   a mixture is always made up of a combination of elements

• False
• true

​ (a)   an element can be broken down into a simpler substance

• false
• true

Explain how to separate the sugar and water that is in solution

• distillation

• with a magnet

• using a coffee filter

• pick out all the different particles of sugar

Classify the following as heterogeneous or as homogeneous

Groups:

(a) Homogeneous

,

(b) heterogeneous

• wood

• steel

• nitric acid

• sand and salt mixture

• granite

• iron with rust

• apple

• tap water

• salt water

• air

• salad

salt dissolves in water

• physical change

• chemical change

hydrochloric acid reacts with magnesium to produce hydrogen gas

• physical change

• chemical change

a piece of copper is cut in half

• physical change

• chemical change