Physical and Chemical Changes Lesson

Physical Properties

Physical properties can be
observed with the 5 senses, sight,
taste, touch, smell and hearing.

Other properties may not be as
obvious. Density is a physical
property. D=mass/volume

Physical Properties

• Other physical properties include malleability, luster, viscosity,

ductility and hardness.

Physical Changes

• Physical changes include a change in

state.

• Example-Ice melts. Both ice and liquid

are water.

• There is no change in the identity, it is

still water.

• Another type of physical change is a

change in shape.

• If you get a haircut, or cut a lemon, the
• identity has not changed.

Multiple Choice

a rusting bicycle

• physical change
• chemical change

Multiple Choice

glass breaking

• physical change
• chemical change

Multiple Choice

melting ice cream

• physical change
• chemical change

Multiple Choice

Which picture shows the log going through a physical change?

Chemical Properties and Changes

• Property of Matter that describes a substances ability to participate in a chemical reaction.

• Matter is changed into something new.
• Key words are react, or reactions.
• Bubbles or a gas is formed.
• Others are flammability, toxicity, bonding, corrosivity and reactivity.

Chemical Changes

• A color change also indicated a chemical reaction has taken place.
• If I add two clear solutions to a beaker, and they turn blue then a chemical reaction has taken place.

• A change in temperature also indicates a chemical reaction.
• If two room temperature solutions are added together and the container becomes hot or cold, then a chemical reaction has taken place.

Multiple Choice

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

• making pancakes

• sugar dissolving into water

• baking a cake

• rotting an apple

Multiple Choice

Which picture shows an apple going through a physical change?

Physical or Chemical Change?

Physical or Chemical Change?

• You get a haircut.
• Wood burns on a campfire.
• You cut a lemon.
• Baking soda and lemon juice are added together. You see bubbles.
• A piece of foil is crumpled.
• You cook an egg.