Chemical Changes

what is the definition of physical change?

• any change that results in the formation of new chemical substances. 
• rusting
• changes affecting the form of a chemical substance, but not its chemical composition.
• any property that is measurable, whose value describes a state of a physical system

what is the definition of chemical change?

• any change that results in the formation of new chemical substances. 
• changing clothes
• matter cannot be created or destroyed, only change form
• changes affecting the form of a chemical substance, but not its chemical composition.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• sour milk
• burning wood
• breaking a pencil
• rust

Tags

NGSS.MS-PS1-2

Baking a cake by mixing flour, sugar, chocolate powder, eggs, and milk, and then heating them in the oven.

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-LS1-7

When you break a cracker into pieces it is a 

• Chemical change
• Physical change
• Chemical Weathering
• Physical Weathering

tire inflated with air

• physical change
• chemical change

Tags

NGSS.MS-PS1-2

ethyl alcohol boils at 79⁰C

• physical change
• chemical change

Tags

NGSS.MS-PS1-4

water freezes at 0⁰C

• physical change
• chemical change

Tags

NGSS.MS-PS1-4

fireworks explode

• physical change
• chemical change

Tags

NGSS.MS-PS1-2

Alka-Seltzer gives off carbon dioxide when added to water

• physical change
• chemical change

Tags

NGSS.MS-PS1-2