States Of Matter Quiz For 8th Grade

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The physical classification of matter divides the substance into solids, liquids, and gases. This 8th-grade science quiz is to test your state of matter knowledge. The quiz contains questions ranging from easy, medium, and hard levels that will test your conceptual understanding and enhance your knowledge quotient on the topic. The quiz will be immensely helpful for last-minute revision before the exam. If you like the quiz, share it with your friends.

Questions and Answers
• 1.

Which answer describes the differences between a solid and a liquid?

• A.

In a solid, the particles have less energy than in a liquid.

• B.

In a solid, the particles have more energy than in a liquid.

• C.

The particles in a liquid are locked in place and the particles in a solid can flow around each other.

• D.

The particles in a solid move less than the particles in a liquid.

• E.

Both A and D are correct.

Correct Answer
E. Both A and D are correct.
Explanation
A solid has less energy than a liquid. The particles do not have enough energy to break free from the other particles, so a solid holds its shape. In a liquid, the particles are higher energy and they move and flow over each other.

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• 2.

Check all the boxes that have true statements.

• A.

At point "C" on the graph, the substance changes shape and volume.

• B.

At point "B" on the graph, the stubstance is undergoing a change in state

• C.

At point "D" on the graph, the substance is completely transformed to a gas.

• D.

At point "E" on the graph, the particles of the substance have more energy than at points "A" or "C"

• E.

The particles at point "A" are locked into place and can only vibrate.

Correct Answer(s)
B. At point "B" on the graph, the stubstance is undergoing a change in state
D. At point "E" on the graph, the particles of the substance have more energy than at points "A" or "C"
E. The particles at point "A" are locked into place and can only vibrate.
Explanation
A is solid state. B is melting. C is liquid state. D is boiling. E is gas state.

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• 3.

The ____________ of a fluid describes its resistance to flowing.

Correct Answer(s)
viscosity
Explanation
Water has low viscosity. Syrup has high viscosity. Oobleck had high viscosity because the starch molecules in it get tangled up as it moves.

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• 4.

Charles's Law states that:

• A.

As the volume of a gas increases, temperature increases.

• B.

As the pressure on a gas increases, volume decreases.

• C.

As the temperature of a gas increases, volume increases.

• D.

As the temperature of a gas increases, volume decreases.

• E.

None of the above.

Correct Answer
C. As the temperature of a gas increases, volume increases.
Explanation
Charles's Law describes the relationship between temperature and volume. As you heat up particles in a gas, they move faster. As the particles move faster, they push out harder on the container they are in. If the container is flexible, like a balloon, it expands (its volume increases.)

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• 5.

What would happen to the volume of a balloon if you moved it from a warm room to a cold freezer?

• A.

Volume would decrease.

• B.

Volume would increase.

• C.

Volume wouldn't change.

• D.

Not enough information is given.

Correct Answer
A. Volume would decrease.
Explanation
As the air in the balloon cools, the molecules slow down. As molecules slow down, they exert less pressure on the sides of the balloon and the balloon would shrink a little bit.

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• 6.

Boyle's Law has to do with the relationship between _________ and ______________ in a gas.

• A.

Temperature, Pressure

• B.

Pressure, Volume

• C.

Temperature, Volume

Correct Answer
B. Pressure, Volume
Explanation
Boyle's Law states that at a constant temperature, when the volume of a gas decreases, pressure increases. You are smushing more particles into a smaller space, so they hit the sides of the container more often, causing more pressure.

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• 7.

What type of substance was the Oobleck we created?  (check all correct answers)

• A.

Regular fluid

• B.

Regular solid

• C.

Colloid

• D.

Non-newtonian solid

• E.

Non-newtonian fluid

Correct Answer(s)
C. Colloid
E. Non-newtonian fluid
Explanation
A colloid is a solution with large molecules dissolved in a liquied. Starch is a large molecule. A non-Newtonian fluid is a fluid that shows different properties under different conditions. Oobleck is non-Newtonian because it behaves like a solid when pressure is applied.

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• 8.

Oobleck took on the properties of a solid when ________________ was applied.

Correct Answer(s)
pressure
force
Explanation
When we squeezed or slapped the oobleck, we applied a force. This caused the long starch molecules to get tangled up together and create a temporary solid-like substance.

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• 9.

When you increase the temperature of a gas in a sealed container (constant volume), the pressure increases.  This is because _______________

• A.

Of the principles described by Charles's Law

• B.

Of the principles described by Boyle's Law

• C.

High-temperature gas particles move faster, so they exert more pressure.

• D.

High-Temperature gas particles move slower, so they exert less pressure.

Correct Answer
C. High-temperature gas particles move faster, so they exert more pressure.
Explanation
The faster particles move, the harder they hit the sides of the container they are in. This causes increased pressure.

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• 10.

Why did the marshmallow in the syringe expand when the plunger was pulled out?

• A.

Pulling the plunger created a force on the marshmallow and spread it out.

• B.

Pulling the plunger changed the pressure inside the syringe by changing the volume of the syringe tube.

• C.

Pulling the plunger changed the volume of the tube, and it created a vacuum.

• D.

Pulling the plunger increased the pressure on the marshmallow and increased its volume.

• E.

None of these are true.

Correct Answer
B. Pulling the plunger changed the pressure inside the syringe by changing the volume of the syringe tube.
Explanation
As the plunger moved outwards, the volume of the syringe increased. The air inside spread out to fill the space. As it spread out, there were fewer particles hitting the marshmallow at any given time and the air pockets inside the marshmallow could expand.

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• Current Version
• May 18, 2023
Quiz Edited by
ProProfs Editorial Team
• Mar 19, 2010
Quiz Created by
Olson304

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