Physical & Chemical Changes and Conservation of Mass Review

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties
• liquid properties
• real properties

Tags

NGSS.MS-PS1-2

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Kim puts an ice cube in a beaker and it melts. This is a good example of:

• a physical change.
• a chemical change.
• an experiment.
• an analysis.

Adding baking soda and vinegar together and it fizzes and creates carbon dioxide.

• Chemical
• Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a Chemical property?

• Thermal Conductivity 
• Density
• Malleability 
• Flammability 

Which of the following properties is a physical property?

• magnetism
• reactivity with oxygen
• flammability
• non-reactive

Which of the following tells you that a chemical change may have occurred?

• Change Shape
• Melting
• Vaporizing
• Change in color

What happens in ALL chemical changes?

• Change in state of matter
• A new substance is formed
• Bubbles are produced
• An explosion

Is copper tarnishing a physical or chemical change?

• Physical 
• Chemical

Which of the following is a reactant

• CH₄
• H₂O
• CO₂
• 2H₂O