U3. The diversity of matter

A pure substance that cannot be broken down into other substances by chemical or physical means. 

• compound          
• atom
• mixture 
• element

Which of these is a compound?

• Aluminium (Al)

• Carbon Dioxide (CO2)

• Nitrogen (N)

• Sand

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

Which of these is a mixture?

• Laundry Detergent

• Salt (NaCl)

• Oxygen (O)

• Fluorine (Fl)

Air is:

• An element

• A compound

• A mixture

• None of these

What is an example of a mixture?

• iron
• ice
• soil
• gold

Jorge prepared a drink and salad for dinner. The chart lists the ingredients for both.
Using the information in the chart, which statement is the BEST description of the drink and salad?

• The salad and fruit drink are both mixtures.
• The salad and the fruit drink are both solutions.
• The fruit drink is a mixture because the ingredients can't be separated.
• The salad is a solution because the ingredients can't be separated.

Which of the following is classified as a pure substance?

• Lemonade

• Fruit punch

• ketchup

• Helium

A mixture that is uniform and well mixed is _____.

• homogeneous
• hetergeneous
• pure substance
• compoud

The picture shown here is what type of mixture?

• homogeneous
• hetergeneous
• pure substance
• element