2.3 Physical and Chemical Properties

Which of these examples is a physical change?

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Physical properties include:

• melting point, shape, freezing point, size, density

• flammability, toxicity, shape, size, oxidation

• melting point, shape, density, size, burning

• melting point, shape, size, density, shape, cooking

Molecules spread out and move FAST!

• solid
• gas
• liquid

Which of the following is a physical change?

• liquid water turning to ice

• wood burning

• rust on a nail

• a cake mix baking into a cake

Which is an example of the formation of a new substance?

• wax melting

• water boiling

• wood burning

• clothes drying

Which of the following changes is chemical?

• making fruit salad

• dissolving sugar

• evaporating liquid water

• leaves changing color in the fall

Which of the following is an example of physical change?

• Mixing baking soda and vinegar together, and this causes bubbles and foam

• A glass cup falls from the counter and shatters on the ground.

• Lighting a piece of paper on fire and the paper burns up and leaves ashes.

• Baking a birthday cake for your mother.

Which of the following is an example of chemical change?

• Filling up a balloon with hot air.

• Taking a glass of water and freezing it by placing it in the freezer.

• A plant collecting sunlight and turning it into food.

• Your dog ripping up your homework.

Reactivity (bubbling, fizzing) is a --- property.

• Chemical

• Physical

Bubbles produced as in the yeast and peroxide demonstration is an example of a --- property.

• Chemical

• Physical