Physical and Chemical Properties, Changes and Reactions

What kind of scientist forms new chemicals by studying chemical reactions?

• Chemical engineer

• Pharmacist

• Materials scientist

• Medical doctor

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

______ is (are) made of more than one atom.

• A molecule

• Neutrons

• Protons

• An element

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NGSS.MS-PS1-1

result(s) in no new substances.

• A physical change

• Physical and chemical changes

• A chemical change

• None of the above

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NGSS.MS-PS1-2

Which is an example of a physical change?

• Burning wood

• Rust on a car

• Freezing water

• Cooking food

Is milk going sour a physical or chemical change?

• Physical 

• Chemical

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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

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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.

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NGSS.MS-PS1-2

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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.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A copper penny turning green after a few years is an example of ...

• Chemical Change

• Physical Change

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NGSS.MS-PS1-2

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