Physical and Chemical Properties, Changes and Reactions

______ result(s) in no new substances.

• A physical change

• Physical and chemical changes

• A chemical change

• None of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which is an example of a physical change?

• Burning wood

• Rust on a car

• Freezing water

• Cooking food

Which of the following are properties of matter?

• Magnetism

• Odor

• Color

• All the above

Is milk going sour a physical or chemical change?

• Physical 

• Chemical

Tags

NGSS.MS-PS1-2

This image shows what happens when methane gas (CH₄) is burned (reacts with oxygen O₂). Which of the following is a reactant?

• Methane (CH₄)

• Water (H₂O)

• Carbon dioxide (CO₂)

• none of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Hard-boiled eggs are the a result of a chemical change because

• the eggs are the same size before vs after.

• the eggs have different properties (smell, taste, color) before vs after.

• the eggs weigh the same before vs after.

• the eggs went through a phase change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Is melting butter a physical or chemical change?

• Physical

• Chemical

Which of these is true about a chemical change? (Choose all correct answers.)

• Molecules are broken apart and/or new molecules are formed.

• New materials are formed with different chemical properties.

• The number of atoms in the reaction stays the same.

• The reactants are the same as the products.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This image shows what happens when methane gas (CH₄) is burned (reacts with oxygen O₂) to produce carbon dioxide and water. Which of the following is a product?

• methane (CH₄)

• oxygen (O₂)

• carbon dioxide (CO₂)

• none of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a clue that a chemical change has occurred? (Choose all correct answers.)

• Formation of a gas (bubbles)

• Color change

• Phase change

• Produces light or heat

Tags

NGSS.MS-PS1-2