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The two most important properties of matter are:

• taking up space and having mass

• being malleable and ductile

• being brittle and hard

• having the ability to carry an electric current and to hold an electric charge

All of the following are examples of matter except

• water vapor

• heat

• smoke

• air

A compound is defined as

• any type of pure substance; whether it is chemically bonded or not

• a pure substance, made of two or more different atoms chemically bonded; and can be broken down into simpler substances.

• a pure substance that cannot be broken down into simpler, stable substances.

• the smallest unit of matter that maintains its chemical identity

Which of the following is an example of a physical change

• a bracelet turning your wrist green

• an ice cube melting in your hand

• a copper bowl tarnishing

• a cut apple turning brown

If a mixture is uniform in composition, it is said to be

• a compound

• heterogeneous

• homogeneous

• chemically bonded

Which of the following is an example of a heterogeneous mixture?

• a pure gold ring

• sucrose (table sugar)

• sand at the beach

• saltwater

A change in state (AKA phase change) is classified as a:

• physical change

• chemical change

• nuclear change

What is 1 main difference between a compound and a homogeneous mixture

• Compounds are physically blended while homogeneous mixtures are chemically bonded

• Compounds have a definite/fixed composition of their elements while homogeneous mixtures can have varying proportions of their components

• Homogeneous mixtures have drastically different properties compared to their original components while compounds maintain the properties of their original elements.

• Compounds are made up of elements while homogeneous mixtures can only be made up of compounds.

Which of the following is a metric unit for mass?

• centimeter

• milligram

• liter

• kilometer

What is the measurement of 5.42 km expressed in meters?

• 54.2 m

• 0.00542 m

• 5420 m

• 0.0542 m