Chemical Changes Review

Which of the following is considered to be an example of an element? 

• Water (H2O)

• Carbon Dioxide (CO2)

• Silver (Ag)

• Methane (CH4)

Which of the following is NOT true about water?

• Water is considered a compound

• Water is a pure substance

• Water is an element

• Water is not an element

Tags

NGSS.MS-PS1-1

Which of the following is NOT a way to identify a chemical change has occurred?

• Change in color

• Precipitate forming (a solid is formed)

• Temperature changing

• A substance dissolving

Tags

NGSS.MS-PS1-2

A student observed bubbling and fizzing occurring during an experiment. What can the student conclude?

• A physical change occurred

• A chemical reaction produced a gas

• A chemical reaction produced a solid

• Nothing changed

Tags

NGSS.MS-PS1-2

To show a chemical change, I hold a spoon full of sugar over a small flame. What would be the best evidence that a chemical reaction has occurred?

• The sugar gets hotter

• The sugar gets colder

• The sugar melts into a liquid

• The sugar turn a black color

Tags

NGSS.MS-PS1-2

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

• Tearing a piece of paper

• Grinding something into powder

• Glass breaking

• The leaves changing color in fall

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The formation of a new substance that has different properties is________.

• A chemical change

• A physical change

• Both types of changes

• Temperature change

Tags

NGSS.MS-PS1-2

Change which alters the physical properties of a substance without changing its identity.

• Chemical Change

• Temperature Change

• Physical Change

• None of the above

After mixing two different mixtures together, a solid substance forms, this is an example of what?

• Physical Change

• Temperature Change

• Precipitate

• Odor Change

Tags

NGSS.MS-PS1-2

The chemical symbol for silver is?

• Au

• Si

• S

• Ag