Chemistry Level 5&6 Pre-Test (2)

Which state of matter has a definite shape and volume?

• Solid

• Liquid

• Gas

• Plasma

What happens to the particles in a liquid when it is heated?

• They move slower

• They move faster

• They stop moving

• They become solid

Which of the following is an example of a mixture?

• Salt (NaCl)

• Air

What is the main difference between a mixture and a compound?

• Mixtures are chemically combined, compounds are not

• Compounds are chemically combined, mixtures are not

• Mixtures have a fixed composition, compounds do not

• Compounds can be separated by physical means, mixtures cannot

Which of the following best describes the particles in a gas?

• Tightly packed and vibrating in place

• Closely packed but able to slide past each other

• Far apart and moving freely

• Fixed in a rigid structure

What is the process called when a solid changes directly into a gas?

• Melting

• Freezing

• Condensation

• Sublimation

Which of the following is a characteristic of a solution?

• It is always a solid

• It is a homogeneous mixture

• It is a heterogeneous mixture

• It cannot be separated by physical means

What happens to the particles in a solid when it is heated to its melting point?

• They move slower

• They move faster and break free from their fixed positions

• They stop moving

• They become gas

Which of the following is NOT a property of gases?

• They have a definite shape

• They can be compressed

• They fill the container they are in

• Their particles move freely

What is the term for a mixture where the different components can be seen and easily separated?

• Solution

• Homogeneous mixture

• Heterogeneous mixture

• Compound