**Unit 1a Lesson Check 3: Physical and Chemical Changes

Determine which of the following scenarios would result in a chemical change.

• Ice cubes melting in a glass of water

• Wood burning in a campfire

• Power plants providing electricity to a city.

• Butter melting in a pan

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mixing food coloring and water is an example of a (a)   change.

• physical

• chemical

Which is an example of a physical change?

• a candle burning

• rust on a bicycle

• ice cream melting

• a firework exploding

Jacob cut an apple and left it on the table while he finished his homework. When he returned to eat the apple, it looked like the apple in the picture. What happened to Jacob's apple?

• It turned brown due to exposure to air.

• It melted because of the heat.

• It grew larger in size.

• It turned into juice.

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NGSS.MS-PS1-2

Why did Jacob’s cut-up apple turn brown when he left it on the table? Was this a physical or chemical change? Explain your answer.

• Jacob’s cut-up apple turned brown due to a chemical change called oxidation.

• Jacob’s cut-up apple turned brown because of a physical change called evaporation.

• Jacob’s cut-up apple turned brown due to a physical change called melting.

• Jacob’s cut-up apple turned brown because of a chemical change called fermentation.

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NGSS.MS-PS1-2

Which are signs that a chemical change has taken place? Select all that apply

• change in mass

• formation of a gas

• formation of a mixture

• change in temperature

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following describes an example of a chemical change?

• a piece of glass breaking

• tearing a piece of paper

• shaping a piece of clay

• rust forming on a car

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Baking soda and vinegar combined to make carbon dioxide is an example of a (a)   change.

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which kind of change alters the shape of an object without changing what type of matter it is?

• chemical change

• physical change

• gradual change

• sudden change

Which is an example of a chemical change?

• a ball of clay is split in two

• a piece of wood is splintered

• a coin rusts

• salt and pepper are mixed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5