Chemical Change

Which of the following statements best describes chemical change.

• A change in size, shape, form, or state of matter in which the matter's identity stays the same.

• The identity of matter has not changed.

• The matter does not become something different.

• A change in matter in which the substances that make up the matter change into other substances with different physical and chemical properties.

This refers to the ability or inability of a substance to combine with or change into other substances.

• physical property

• chemical property

During a physical change, only the physical properties of matter change.

• True

• False

During a chemical change, the new substance formed has the same physical and chemical properties with the original substances.

• True

• False

What is another name for chemical change?

• chemical bond

• chemical conservation

• chemical reaction

• chemical state

What are the two signs that a chemical change is occurring during a forest fire. Select two answers.

• change of shape of trees and leaves

• light is produced

• change of size of leaves and trees

• heat is produced

Which of the following is not a new substance formed during forest fire?

• water vapor

• carbon dioxide

• leaves

• ash

What is the only sure sign of a chemical change?

• change in color

• change in state of matter

• change in size and shape

• formation of a new substance

Which of the following physical properties can also be a sign that chemical change is taking place during the fall season?

• change in state of matter of leaves

• change in shape of leaves

• change in color of leaves

• change in form of leaves

What similar sign can be observed when you boil water (physical change) and mix chemicals (chemical change)?

• change of color

• change in odor

• formation of gas

• formation of new substance