Chemcial vs Physical Change Test

When you break a cracker into pieces it is a 

• Chemical change

• Physical change

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

• change in shape

• melting

• formation of a gas

• dissolving

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

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.

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

Is moldy cheese a chemical or physical change?

• chemical
• physical

Is spoiled meat a chemical or physical change?

• chemical
• physical

Is squeezing oranges to make orange juice a physical or chemical change?

• physical
• chemical

Are fireworks exploding a physical or chemical change?

• phyiscal 
• chemical

Is mowing the lawn a phyiscal or chemical change?

• physical
• chemical