Science SOL Review

If there is a rise in temperature during a chemical reaction it is called a _________________ reaction.

• endothermic

• exothermic

If an Ice cream melts will it be

• Physical Change

• Chemical change

• Elemental change

• states of matter changes

In a chemical reaction or change a new substance is not created.

• true

• false

When heat is added to matter, the molecules tend to 

• move faster and farther apart
• slow down
• nothing, heat has no impact on the state of matter
• freeze

How many atoms of sodium (Na) are in one molecule of baking soda?

• 1

• 2

• 3

• 4

Gold is an example of a(n) 

• pure element
• pure compound
• pure mixture

A row across the Periodic Table where each element has the same number of energy shells

• column
• family
• period

Which of the following are NOT signs that a chemical reaction occured?

• the properties changed
• bubbles of gas formed
• color stays the same
• smells different

What is a  pure substance made of two or more elements chemically combined in a set ratio. Ex: CO2 has a set ratio of 1:2, meaning for every one carbon atom there are two oxygen atoms.

• element
• compound
• mixture
• salad

In what type of bond are electrons gained or lost?  This happens between a metal and a non-metal?

• ionic
• covalent
• subatomic