Physical & Chemical Changes Test Review

Which TWO indicate that a chemical change has occurred?

• Red food coloring is added to room temperature water. The water turns red.

• A white marshmallow is placed over an open flame and turns black

• Chocolate syrup is added to a glass of milk, and the solution turns brown. 

• An apple slice is left on the kitchen counter and turns brown. 

Tags

NGSS.MS-PS1-2

Which TWO pieces of evidence listed indicates that a chemical change occurred?

• Cutting paper using scissors changes a single piece of paper into multiple pieces of paper

• Melting an ice cubes a solid to a liquid

• When mixing a red liquid and a clear liquid, a bright blue liquid is produced

• Boiling water causes water vapor to rise from it

• Two liquids mix and form a precipitate

Tags

NGSS.MS-PS1-2

Which of the following observations is evidence that a chemical reaction took place? Select ALL correct answers.

• A gas was produced

• The temperature changed

• The color changed

• A precipitate was formed

• An odor was produced

Tags

NGSS.MS-PS1-2

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

• The crystals were added to the liquid.

• The crystals dissolved in the liquid.

• The color of the mixture changed unexpectedly.

• The liquid remained clear.

Tags

NGSS.MS-PS1-2

Which of the following is an indication that a physical change has occurred?

• Gas bubbles

• A precipitate formed

• A change in size, shape or appearance

• Change in thermal energy

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

• Cutting fabric

• A rotting banana

• Hitting a pinata

• Boiling water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which process is an example of Physical Change?

• Carrots cut up into small pieces and mixed into a salad.

• A sandwich is eaten and broken down by enzymes in the stomach.

• Calcium Chloride and Baking Soda are combined to form our Sunset in a bag.

• Sodium metal and water are combined to form a flammable gas.

A student observed a precipitate form during a chemical reaction. What did the student most likely observe?

• A change in temperature occurred.

• The mixture changed color.

• A solid formed in the solution.

• Gas bubbles were released.

Tags

NGSS.MS-PS1-2

A student conducted an experiment in class by combining 50 mL of a blue liquid and 50 mL of a yellow liquid. After mixing, she recorded observations. Which observations prove that a chemical reaction took place? Please select the two correct answers.

• The color of the combined liquids was green

• Bubbles formed in the combined liquids

• The mass of the combined liquids increased

• The temperature of the combined liquids decreased by 30 degrees.

Tags

NGSS.MS-PS1-2

Bubbles Forming is what kind of change?

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2