PHYSICAL AND CHEMICAL CHANGES · Explain why liquid water freezing into ice is considered a...
Transcript of PHYSICAL AND CHEMICAL CHANGES · Explain why liquid water freezing into ice is considered a...
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.