GMAS Physical Science Review

Which are examples of chemical change? Select THREE answers.

• An egg is cooked.

• Sugar dissolves in water.

• A silver quarter tarnishes.

• Water in a pan boils away.

• Leaves in a compost pile rot.

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Which state of matter has a fixed volume (amount of space it takes up) but not a fixed shape?

• gas

• liquid

• solid

A student wants to make water vapor condense. What must the student do to the water vapor?

• heat it

• cool it

• trap it in a container

• mix it with other gases

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Why might a glove stick to a sweater when you take them out of a clothes dryer?

• Both items are dry.

• The glove and the sweater have opposite charges.

• An electric current flows between the glove and the sweater.

• An electric current reduced the number of electrons in both items.

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Which of these is a way to make an electromagnet stronger?

• putting a switch in the electrical circuit

• replacing the iron core with a copper core

• replacing the copper wire with plastic wire

• wrapping the wire around the iron core more times

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What happens when a mixture is separated?

• A substance is lost.

• A new substance is formed.

• The substances stay the same.

• The mass of the substances changes.

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What type of wave has the most energy?

• a low-frequency wave
• a high-frequency wave
• a wave length with Hertz
• a wave with a magnetic field

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What property of electromagnetic waves makes it possible to use these waves to transmit information between a space shuttle and NASA mission control centers on the ground?

• Electromagnetic waves have very low velocity.
• Electromagnetic waves are transverse waves.
• Electromagnetic waves are all visible to human eyes.
• Electromagnetic waves can travel through a vacuum.

Which statement best describes the model that shows a compound?

• Model X shows a compound because there are two different types of atoms.

• Model X shows a compound because two different atoms are chemically bonded together.

• Model Y shows a compound because there is more than one type of atom.

• Model Y shows a compound because each pair of matching atoms can form a chemical bond.

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What is a PUSH or PULL of an object?

• Motion
• Force
• Friction
• Gravity

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