Evidence of a Chemical Change

diagram "a" is an example of a(n)

• element

• compound

• mixture

Tags

NGSS.MS-PS1-1

Which is NOT evidence of a chemical change from one of the interactions we tested yesterday?

• Odor or smell produced

• A huge explosion

• Formation of a gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What was the chemical reaction from hydrogen peroxide and a potato?

• Fire produced

• A huge explosion

• formation of a gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following indicates a chemical change has occurred ?

• Change in shape

• Change in the state (ex: a solid, liquid or gas)

• Change in temperature

Tags

NGSS.MS-PS1-2

What is a common indicator of a chemical change?

• Change in shape

• Change in color

• Change in size

Tags

NGSS.MS-PS1-2

Which is NOT an indication of a chemical change?

• temperature change

• formation of a precipitate

• shape change

• production of light

Tags

NGSS.MS-PS1-2

Four students, each working in different labs, conducted experiments by mixing various chemicals. The outcomes of their experiments are documented in the provided table. Which of the experiments resulted in the formation of new substances? Choose the best answer choice.

Tags

NGSS.MS-PS1-2

John pours a clear liquid from a flask into another clear liquid in a beaker during his chemistry experiment. Which of the following results of this procedure would indicate a new substance was formed?

• The level of the substance in the beaker is higher after the other liquid is added.

• A yellow solid forms and then settles to the bottom of the beaker.

• Small white crystals are left behind in the flask that held the first liquid.

Tags

NGSS.MS-PS1-2

During a science experiment in school, which of the following scenarios is an example that includes evidence of a chemical reaction?

• A student places a sample of zinc in a beaker of water and it settles to the bottom

• A student heats a solid block of ice in a lab and it completely melts into a liquid. 

• A student burns sugar in a lab, it gives off an odor and turns brown and then black.

• A student places a tomato into a blender in a cooking class and chops it up into smaller pieces.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist combines clear sugar crystals with a blue food coloring and the following observations are obtained.
 Which of the listed observations indicate a new substance was formed? Check ALL that apply.

Tags

NGSS.MS-PS1-2