Unit 1 Test Matter

Which of the following indicate that a chemical reaction has occurred?

• the formation of gas bubbles
• a change in color
• an odor
• all of these indicate that a chemical reaction has occurred.

The particles that make up gases are ____________.

• very close together
• very far apart

You are performing an experiment combining two substances in a closed container. You first pour 350mL of substance one followed by 430mL of substance two. A chemical reaction occurs. Choose the equation below that would best explain the total mass of the combined substances.

• 430 mL - 350 mL = 80 mL (SUBTRACTION)
• 350 mL x 430 mL = 780 mL (MULTIPLICATION)
• 350 ml + 430 mL = 780 mL (ADDITION)
• 780 mL - 430 mL = 350 mL (SUBTRACTION)

A _______ property is a characteristic that can be observed and measured without changing the material?

• physical
• chemical

A ______ produces new matter with new and different properties.

• physical change
• chemical change
• chemical property
• physical property

The ability to burn is an example of a physical property.

• True
• False

___________ is a physical property that describes how light reflects off of an object.

• solubility
• conductivity
• reflectivity

The amount of space an object takes up is its _________.

• matter
• mass
• volume
• property

A boiled egg in its shell weighs ______ a raw egg in its shell.

• more than
• the same as
• less than

What would happen to the weight of an ice cube if it melted?

• it would weigh a little more
• it would weigh a lot less
• it would weigh the same
• it would weigh a lot more