CFB 8th Chemistry

Ice melting is an example of...

• physical change like burning wood
• physical change like cutting paper
• chemical change like dissolving sugar
• chemical change like rust 

This happens in a chemical reaction:

• bonds break
• atoms rearrange
• new bonds are formed
• all of the above

The formation of solid particles in a substance is called:

• precipitate
• dissolving
• sugar
• koolaid

If you see a precipitate, then what has likely occurred?

• a physical change like rust
• a chemical change like tarnishing silver
• a physical change like dissolving sugar
• a chemical change like melting butter

A bike was left outside and the iron reacted with the oxygen in the air and rust formed. This is an example of:

• a physical change like chewing food
• a physical change like digesting food
• a chemical change like baking a cake
• a chemical change like cracking an egg

An element is:

• two or more types of atoms
• only one kind of atom
• two or more capital letters
• a type of compound

When elements form compounds....

• they look the same
• their properties change
• they become poisonous
• they explode

Element or Compound? Fe₂O₃

• Element
• Compound

Element or Compound? Au

• Element
• Compound

A compound is:

• only one kind of atom
• two or more kinds of atoms
• on the Periodic Table
• a physical change