MS-PS1-2

Choose the image that best describes an element or elements.

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Tags

NGSS.MS-PS1-1

Choose the image or images that has elements and molecules

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NGSS.MS-PS1-1

Choose all the physical changes.

• Liquid water becomes water vapor.

• Combining sulfuric acid and sodium chloride gives off hydrogen chloride gas.

• Sodium chloride (NaCl) dissolves in water.

• Burning a scented candle.

• Dry ice (solid CO2) sublimates to CO2 gas.

Tags

NGSS.MS-PS1-4

Choose all the chemical changes.

• Liquid water becomes water vapor.

• Combining sulfuric acid and sodium chloride gives off hydrogen chloride gas.

• Sodium chloride (NaCl) dissolves in water.

• Burning a scented candle.

• Dry ice (solid CO2) sublimates to CO2 gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which reason BEST explains why atoms bond together to form molecules and compounds?

• they have sticky electrons

• the bigger the molecule, the more energy it has

• atoms want to be stable

• they do not want to bond

How are chemical reactions different from a physical change?

• physical changes create a new substance, chemical reactions do not

• chemical reactions create a new substance, physical changes do not

• chemical reactions happen more, physical changes happen less

• physical changes happen more, chemical reactions happen less

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which is not a physical property

• flammability

• melting point

• boiling point

• density

A physical change happens when …

• the substance does not change into a new substance with new chemical properties

• the substance changes into something different with new chemical properties

Tags

NGSS.MS-PS1-4

Which of the following is NOT an example of a physical change

• Cutting paper

• Burning wood

• Melting glass

• Boiling water

Tags

NGSS.MS-PS1-2

What is a melting point?

• the temperature at which a substance changes from a liquid to a gas

• the temperature at which a substance changes from a solid to a liquid

• the temperature at which a substance changes from a liquid to a solid

• the temperature at which a substance changes from gas to plasma

Tags

NGSS.MS-PS1-4