13 Nov - Chemical Changes

Multiple Choice

Which of the following best describes a chemical property?

• The ability to change color when heated

• The ability to produce a change in the composition of matter

• The ability to melt at a certain temperature

• The ability to dissolve in water

Multiple Choice

Which of the following best defines flammability?

• A material’s ability to burn in the presence of oxygen.

• A material’s ability to dissolve in water.

• A material’s ability to conduct electricity.

• A material’s ability to change color.

Open Ended

Explain the difference between flammability and reactivity in terms of how substances interact with their environment.

Multiple Choice

Which of the following words usually signify a chemical change?

• Burn

• Melt

• Freeze

• Condense

Open Ended

Describe two visual clues that indicate a chemical change has occurred.

Fill in the Blanks

A solid that forms and settles out of a liquid mixture is called a

.

Multiple Choice

When matter undergoes a chemical change, what happens to its composition?

• It changes.

• It remains the same.

• It evaporates.

• It melts.

Multiple Choice

Classify the following changes as physical or chemical changes: a. Water boils b. Salt dissolves in water c. Milk turns sour d. A metal rusts

• a. Water boils - Physical, b. Salt dissolves in water - Physical, c. Milk turns sour - Chemical, d. A metal rusts - Chemical

• a. Water boils - Chemical, b. Salt dissolves in water - Chemical, c. Milk turns sour - Physical, d. A metal rusts - Physical

• a. Water boils - Chemical, b. Salt dissolves in water - Physical, c. Milk turns sour - Chemical, d. A metal rusts - Physical

• a. Water boils - Physical, b. Salt dissolves in water - Chemical, c. Milk turns sour - Physical, d. A metal rusts - Chemical

Fill in the Blanks

A chemical property can be observed only when a substance is changing into

substances.

Open Ended

Reflecting on today's lesson about chemical properties, what is one question you still have or one concept you would like to explore further?