NGSS.MS-PS1-2

a substance formed as a result of a chemical reaction

• product
• reactant

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NGSS.MS-PS1-2

Which statement is not supported by the student's observations?

• a chemical reaction takes place between magnesium and hydrochloric acid
• a gas is released in Test Tube 2
• the substances on both test tubes are reactive only at high temperatures
• energy is released in the reaction involving hydrochloric acid.

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NGSS.MS-PS1-2

Physical or Chemical Change?

• Physical Change
• Chemical Change

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NGSS.MS-PS1-2

Is milk going sour a physical or chemical change?

• Physical

• Chemical

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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

Which of these is not a chemical change

• leaves decaying

• icicles melting

• wood burning

• rust on a bicycle

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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

Which is not a clue that could indicate a chemical change has occurred?

• Change in color

• Change in shape

• Release of energy

• Formation of an odor

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NGSS.MS-PS1-2

Combustion is a ____________

• Physical process

• Chemical process

• Both of these processes

• None of these

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NGSS.MS-PS1-2

Explain what is happening in the following image.

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NGSS.MS-PS1-2