Physical & Chemical Changes & Mixtures

Multiple Choice

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

• Crushing a can

• Burning wood

• Rusting iron

• Baking a cake

Multiple Choice

melting ice cream

• physical change
• chemical change

Multiple Choice

Observe the picture and choose the correct option.

• Irreversible physical change

• Reversible physical change

Multiple Choice

Is milk going sour a physical or chemical change?

• Physical 
• Chemical

Multiple Choice

What are the main differences between physical and chemical changes?

• Physical changes involve changes in state, while chemical changes involve changes in composition.

• Chemical changes can be reversed, while physical changes cannot.

• Both types of changes result in new substances being formed.

• Physical changes do not involve energy changes, while chemical changes do.

Open Ended

When baking soda is added to vinegar, it "disappears" and causes vigorous fizzing and gas evolution. If a match is brought near the reaction flask, it is extinguished. List 2 key pieces of information that help you identify this as a chemical change.

Multiple Choice

What type of mixture is this?

• heterogeneous mixture

• homogeneous mixture

• solution

• colloid

Multiple Choice

What is the difference between heterogeneous and homogenous mixtures?

• Heterogeneous mixtures have visible parts, while homogenous mixtures do not.

• Heterogeneous mixtures are always liquids, while homogenous mixtures are solids.

• Heterogeneous mixtures are more common than homogenous mixtures.

• Heterogeneous mixtures are always colored, while homogenous mixtures are clear.

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident