Properties of and Changes in Matter

Butter melts when heated on a pan. What happens to the molecules of butter when it is heated?

• They move slower

• They move faster

• They keep steady

• They start to disappear

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NGSS.MS-PS1-4

Which is an example of a physical change?

• mixing vinegar and baking powder

• boiling of water

• rusting or iron nail

• burning of wood

Which is an example of a chemical change?

• dissolving salt in water

• shredding of paper

• rotting of fruits

• cutting of vegetables

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

When vinegar is added to milk, a white solid substance is formed. What is this solid substance called?

• solute

• reactant

• precipitate

• smoke

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NGSS.MS-PS1-2

Which is not necessarily an evidence of a chemical change?

• formation of bubbles

• formation of precipitate

• change in state

• change in color

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NGSS.MS-PS1-2

When oil and water are mixed together, they will form two layers. Which property of matter best explains this?

• density

• volume

• boiling point

• malleability

When two clear liquids are mixed together, gas is formed while the liquids remained clear. What kind of change is exhibited in this situation?

• physical

• chemical

• neither physical nor chemical

• both physical and chemical

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which would indicate a chemical change when two colored liquids are mixed together in a beaker?

• There will be an increase in volume of liquids in the beaker.

• There will be two layers of liquids that will form in the beaker.

• There will be an increase in the mass of liquids combined in the beaker.

• There will be a change in color of liquids combined in the beaker.

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NGSS.MS-PS1-2

Which best describes the change that happened in the given illustration?

• Physical change because the paper reacts with oxygen and produces heat and light.

• Physical change because the paper changes in state that allows it to produce heat and light.

• Chemical change because the paper reacts with oxygen and produces heat and light.

• Chemical change because the paper reacts with sunlight that enables it to produce heat and light.

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which statement best defines density?

• It is the amount of matter in a substance.

• It is the amount of space occupied by a material.

• It is the relationship between the mass and volume of a substance.

• It is the ability of a material to bent without breaking.