NGSS.MS-PS1-2

Is bleaching your hair a physical or chemical change?

• physical
• chemical

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NGSS.MS-PS1-2

Which of these is not a chemical reaction?

• Burning of wood
• Milk going bad
• Mixing vinegar and baking soda
• Melting of ice

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NGSS.MS-PS1-2

Is burning wood a chemical or physical change?

• chemical
• physical
• neither physical or chemical

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NGSS.MS-PS1-2

Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

• The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
• Bubbles were produced during the reaction, which meant that a gas was being produced.
• The plastic bag did not change in any way, indicating that it was not involved in the reaction.
• The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

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NGSS.MS-PS1-2

rusty nail

• chemical change

• physical change

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NGSS.MS-PS1-2

Bob and his friends, noticed an apple on the ground. The apple was beginning to decay. This is a chemical change. Which of these are evidence of a chemical change.

• A change in the size and shape

• A change in color and smell

• A change in texture and shape

• A change in size and hardness

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NGSS.MS-PS1-2

Exploding fireworks is a

• Physical Change

• Chemical Change

• Katy Perry Song

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NGSS.MS-PS1-2

What is the outcome of observing a chemical property?

• Nothing

• A new substance is formed with different properties

• NaCl

• A rise in thermal conductivity

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NGSS.MS-PS1-2

One clue of a chemical change is the formation of a precipitate. A precipitate is formed when...

• Two liquids react and a gas is produced

• A solid dissolves in a liquid

• One liquid dissolves in another

• Two liquids react and a solid is formed

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NGSS.MS-PS1-2

What are the products of combustion?

• Hydrogen + oxygen

• Carbon dioxide + water

• Carbon dioxide + hydrogen

• Carbon + water

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NGSS.MS-PS1-2