Physical and Chemical Change

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Which is an example of a chemical reaction?

• paper cut into small pieces
• chocolate melting in a pan
• flour and sugar mixed in a bowl
• cookies baking in an oven

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which answer makes a correct statement?

• Physical change only changes the size.
• Physical change only changes the color.
• Physical changes begin and end with the same matter.
• Physical changes change the matter into something total different.

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

• cutting a piece of paper
• folding a piece of paper
• tearing a piece of paper
• burning a piece of paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following indicates a chemical change?

• Change in state of matter
• Temperature change
• Change in size 
• Change in shape

Tags

NGSS.MS-PS1-2

Which of the following DOES NOT indicate a chemical change/reaction is occurring?

• Color Change
• Formation of a Precipitate
• Formation of gas/bubbles
• State of matter change

Tags

NGSS.MS-PS1-2

Which of the following indicates a PHYSICAL change?

• Change in temperature
• Change in shape
• Formation of a precipitate
• Change in color

Which of the following is NOT an example of a physical change?

• crumpling paper

• sharpening a pencil

• clothes shrinking

• sour milk

Which of the following is NOT an example of chemical change?

• sour milk

• burning wood

• breaking a pencil

• rust

Tags

NGSS.MS-PS1-2

What does it mean when there is a physical change?

• Matter has change from one substance into another.

• Matter has change on the molecular level

• A new substance has been formed.

• Matter has changed size, shape or form.

Tags

NGSS.MS-PS1-4