Unit Test Matter and Energy

All of the following are examples of matter EXCEPT....

• an chair
• a bird
• a towel
• sunlight

Which of these shows a chemical change?

• tearing paper
• morning dew on the grass
• melting ice
• a copper roof that turned green

The smallest unit of matter is

• an atom
• a compound
• a molecule
• the heart of a flea

Which of these is an example of a molecule?

• A Sodium atom
• salt mixed in water
• Water- H₂O
• A Carbon atom

This image shows ......

• An Element
• A Mixture
• A Pure Compound
• No molecules

Which of these is a compound?

• Sugar mixed in water
• A sodium atom
• Water- H₂O
• Ocean water

An element contains.....

• Water and other molecules
• Only one type of atom
• Many different types of atoms
• Atoms and compounds

The density of water is 1 g/cm3. Would wood float or sink when put in a beaker of water?

• Float
• Sink

Which of the substances listed in the most dense?

• Wood
• Gold
• Paraffin Wax
• Aluminum

Which of these is a chemical change?

• A candle melting
• Boiling water
• Burning firewood
• Tearing paper