Evidence of Chemical Change

Which of the following does not exhibit a chemical change?

• a phase change

• productions of gas

• change in color

• all of the choices

Tags

NGSS.MS-PS1-2

A different chemical substance is made when ______________.

• ice melts

• a metal corrodes

• water evaporates

• a glass breaks into pieces

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A teacher lit a candle and described to her class that some of the wax are burning while some are melting. Ana states that these are both physical changes, while Chloe states that these are both chemical changes. Which of the following statement describes both of the students’ conclusion?

• Chloe is correct.

• Ana is correct

• Both are incorrect, because melting of wax is a chemical change while burning of wax is a physical change.

• Both are incorrect, because burning of wax is a chemical change while melting of wax is a physical change.

Tags

NGSS.MS-PS1-4

In kaingin, the fire destroys hectares of forest land. There is a lot of smoke and trees turn to charcoal.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When making a hot chocolate drink, clear water turns brown when you mix chocolate powder in.

• Physical Change

• Chemical Change

On a hot day, water forms on the outside of a cold glass of water.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-4

A raw egg gets cooked.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

We use diamond to cut glass tubings.

• Physical Change

• Chemical Change

Formation of clouds

• Physical Change

• Chemical Change

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

Dynamite explosion  

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5