PHYSICAL AND CHEMICAL CHANGES

Write the letter of the correct response on the line provided to the left. ____ 1. Color change is evidence that a chemical change may have occurred.

a. True b. False ____ 2. Fizzing or foaming is evidence that a chemical change may have occurred.

a. True b. False ____ 3. Production of sound is evidence that a chemical change may have occurred.

a. True b. False ____ 4. Production of an odor is evidence that a chemical change may have occurred.

a. True b. False ____ 5. Chemical changes can not be reversed by physical changes.

a. True b. False

Answer the following questions.

1. Examine the picture to the right.

(a) Describe the physical change that is occurring. (b) Describe the chemical change that is occurring.

PHYSICAL AND CHEMICAL CHANGES

Write the letter of the correct response on the line provided to the left. ____ 1. Color change is evidence that a chemical change may have occurred.

a. True b. False ____ 2. Fizzing or foaming is evidence that a chemical change may have occurred.

a. True b. False ____ 3. Production of sound is evidence that a chemical change may have occurred.

a. True b. False ____ 4. Production of an odor is evidence that a chemical change may have occurred.

a. True b. False ____ 5. Chemical changes can not be reversed by physical changes.

a. True b. False

Answer the following questions.

1. Examine the picture to the right.

(a) Describe the physical change that is occurring. (b) Describe the chemical change that is occurring.

Read each statement. Decide if the statement describes a physical or a chemical change. If it describes a physical change, write a “P” on the line to the left. If it describes a chemical change, write a “C” on the line to the left. ____ 1. You cut your hair

____ 2. Making a peanut, pretzel and cereal mixture

____ 3. Baking soda reacts with vinegar and forms a gas

____ 4. A piece of metal is bent in half

____ 5. Methanol is burned and leaves a residue

____ 6. An aspirin is crushed into fine powder

____ 7. Copper turns green when exposed to the environment

____ 8. Two clear liquids are mixed and a yellow color forms

____ 9. Baking cookies

____ 10. A tree burns to form ashes

Explain why liquid water freezing into ice is considered a physical change. Explain why combining iced-tea powder and water to produce iced-tea beverage is not a chemical change.

Read each statement. Decide if the statement describes a physical or a chemical change. If it describes a physical change, write a “P” on the line to the left. If it describes a chemical change, write a “C” on the line to the left. ____ 1. You cut your hair

____ 2. Making a peanut, pretzel and cereal mixture

____ 3. Baking soda reacts with vinegar and forms a gas

____ 4. A piece of metal is bent in half

____ 5. Methanol is burned and leaves a residue

____ 6. An aspirin is crushed into fine powder

____ 7. Copper turns green when exposed to the environment

____ 8. Two clear liquids are mixed and a yellow color forms

____ 9. Baking cookies

____ 10. A tree burns to form ashes

Explain why liquid water freezing into ice is considered a physical change. Explain why combining iced-tea powder and water to produce iced-tea beverage is not a chemical change.