2.1 States of Matter and Phase Changes

Which of the following states has the highest density?

• Gas

• Liquid

• Solid

• Plasma

Which of the following states CANNOT be compressed?

• Solid

• Liquid

• Gas

• Plasma

A state of matter that has high density, cannot be compressed, can diffuse, and has no fixed shape.

• Solid

• Liquid

• Gas

• Plasma

Which state of matter has no fixed shape but fixed volume?

• Solid

• Liquid

• Gas

• Plasma

Which of the following is correct about gases?

• They fill the space they are in

• They cannot be compressd

• They don't flow

• They have high density

Which of the following states is defined as ionized gases that produce light?

• Solid

• Liquid

• Gas

• Plasma

Which of the following phase changes are opposite to each other?

• Melting and Vaporization

• Sublimation and Deposition

• Melting and Boiling

• Vaporization and Condensation

Which of the following phase change is the change from Gas to Liquid?

• Freezing

• Ionization

• Condensation

• Vaporization

The phase change from gas to solid ____________. (fill the blank)

• Particles move apart

• Particles move closer

• Particles absorb energy

• Needs heating

This is the heating curve of an unknown substance. What is the boiling point of this substance?

• Near 60 °C

• Near -100 °C

• -20 °C

• It is a phase diagram