Evidence of Chemical Change

Which of the following is an indicator of chemical change?

• Change in shape with the application of some type of force

• Change in temperature with no outside heat source applied

• The formation of a solid due to freezing

• The formation of a gas due to evaporation

Tags

NGSS.MS-PS1-2

Which of the observations of fireworks does NOT indicate that a chemical change has occurred?

• Many colors are produced

• Bright light is given off

• Smoke is produced

• Heat is released

• Loud sounds are produced

Tags

NGSS.MS-PS1-2

The formation of a solid when two liquids combine is called?

• Solidification

• Freezing

• Precipitate

• Solubility

Tags

NGSS.MS-PS1-2

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

• Dissolving salt

• Crushing a juice box

• Frying an egg

• Melting silver

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student pours a glass of soda and observes the formation of clear bubbles. Has a chemical change occurred?

• Yes, because a gas was formed from a liquid.

• No, because the gas dissolved in the soda just floats to the top of the liquid.

• No, because the soda was not heated.

• Yes, because the formation of bubbles is always an indicator of chemical change.

Tags

NGSS.MS-PS1-2

Which observation(s) might be used as evidence that a chemical reaction occurred in this picture ?

• Color change

• Odor change

• Temperature change

• All of the above

Tags

NGSS.MS-PS1-2

TEKS.SCI.6.6E

Abigail, Ava, and Aiden were doing a science project. They observed different scenarios and had to identify which one shows that a chemical reaction has occurred. Which of the following scenarios they observed shows that a chemical reaction has occurred?

• Abigail struck a rock with a hammer and it broke into smaller pieces.

• Aiden left a hammer outside for too long and rust formed on it.

• Ava added a few drops of red food coloring to a cup of water and it turned pink.

Tags

NGSS.MS-PS1-2

TEKS.SCI.6.6E

Identify if example or not example of a chemical change.

Groups:

(a) Evidence of Chemical Reaction

,

(b) Not evidence of chemical reaction

• Production of light

• Gas Production

• Color Change

• Temperature Change

• Boiling

• Dissolving

• Freezing

• Formation of a precipitate

• Mixing

• Melting

Tags

NGSS.MS-PS1-2

Which is not evidence that a chemical reaction has occured

• Production of flames

• Change in temperature or heat

• Melting

• Production of a gas

Tags

NGSS.MS-PS1-2

TEKS.SCI.6.6E

Match the following is evidence of a chemical reactions.

• Change in temperature Exothermic

• 
• Change in temperature

  Endothermic

• 
• Change in color

• 
• Formation of a precipitate

• 
• Production of gas

• 

Tags

NGSS.MS-PS1-2