NGSS.MS-PS1-2

The formation of stalactites and stalagmites in a cave as water mixed with carbon dioxide creates carbonic acid, which dissolves away the limestone, is an example of:

• mechanical weathering
• chemical weathering

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NGSS.MS-PS1-2

When coffee is poured into a cup of ice, the ice begins to melt and mix with the coffee. Which statement best describes this change?

• The ice melting is a chemical change because the water changes form.
• The ice melting is a physical change because the water may be frozen again.
• The water and coffee mixing is a chemical change because the liquids change color.
• The water and coffee mixing is a physical change because the mixture forms bubbles.

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NGSS.MS-PS1-2

 Mixing the metal Sodium with the gas Chlorine will react and create table salt (NaCl). This type of change is a ______.

• Physical change
• Chemical change

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NGSS.MS-PS1-2

a new substance formed in a chemical reaction

• reactants
• products

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NGSS.MS-PS1-2

Physical or Chemical Change?

• Physical Change
• Chemical Change

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NGSS.MS-PS1-2

Which of the following is a chemical change?

• Iron rusting 
• Glass breaking
• Clothing ripping
• Hair cut

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NGSS.MS-PS1-2

Burning a piece of paper is an example of a

• Physical Change

• Chemical change

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NGSS.MS-PS1-2

a solid substance formed when two solutions are chemically combined.

• precipitate

• rain

• sublimation

• solvent

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NGSS.MS-PS1-2

Is this an example of a physical or chemical change?

• physical

• chemical

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NGSS.MS-PS1-2

A student is investigating the process that changes steel into rust. According to the table, which of the beakers from Investigation 1 does not show evidence of a chemical change?

• Beaker X

• Beaker Y

• Beaker Z

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NGSS.MS-PS1-2