Quiz on States of Matter

Which state of matter has a fixed volume but takes the shape of its container?

• Solid

• Liquid

• Gas

• Plasma

What is the process called when a solid turns directly into a gas without becoming a liquid?

• Melting

• Sublimation

• Condensation

• Evaporation

The random motion of smoke or dust particles in a fluid, caused by collisions with the fluid's molecules, is known as ____ motion.

According to the kinetic model, how are the particles in a solid arranged and how do they move?

• Packed in a regular lattice and vibrating

• Packed irregularly and moving past each other

• Far apart and stationary

• They are closely packed and move past each other.

What happens to the boiling point of a pure liquid, like water, when the surrounding pressure increases?

• It decreases

• It remains the same

• It increases

• It has no effect.

The change of state from a gas to a liquid is called ____.

Which of these statements correctly describes the particles in a gas, according to the kinetic model?

• They vibrate in fixed positions.

• They are spread very far apart and move randomly.

• They are held together by strong attractive forces.

• The attractive forces between the gas particles.

What is the effect of an impurity on the melting point of a substance?

• It raises the melting point.

• It lowers the melting point and makes it occur over a range of temperatures.

• It has no effect.

• It makes the melting point sharper.

Which of the following are key principles of the kinetic model of matter? (Select all that apply)

• All matter is made of very small particles.

• The pressure of a gas is caused by particles hitting the container walls.

• Gas particles are far apart, so the attractive forces between them are very weak, allowing them to move freely.

• Gases expand most when heated.

A flat, horizontal section on a heating curve for a pure substance indicates that the substance is ____.

• Melting

• Boiling

• Freezing

• Condensation