Year 8 Chemistry: Particle Model

According to the particle model, matter is made up of particles that are constantly moving. How many arrangements (or states) of matter are there?

• One

• Two

• Three

• Four

Which state of matter has particles that vibrate in place, have a fixed volume and shape, and cannot be compressed?

• Solid

• Liquid

• Gas

• Plasma

What is the main difference between the particles in solids and liquids?

• Solids have more kinetic energy than liquids.

• Liquids have more empty space between particles than solids.

• Solids have fixed positions while liquids can flow over each other.

• Liquids have a fixed volume and shape while solids take the shape of their container.

Which state of matter has particles that can move around freely within the container and can be compressed?

• Solid

• Liquid

• Gas

• Plasma

What is the main difference between the particles in liquids and gases?

• Liquids have more kinetic energy than gases.

• Gases have fixed positions while liquids can flow over each other.

• Liquids have a fixed volume and shape while gases take the shape of their container.

• Gases have more empty space between particles than liquids.

Which state of matter has particles that can flow over the top of each other but cannot be compressed?

• Solid

• Liquid

• Gas

• Plasma

Which state of matter has particles that contain much more kinetic energy than solids and liquids?

• Solid

• Liquid

• Gas

• Plasma

Which state of matter has particles that can move around but are still unable to be compressed?

• Solid

• Liquid

• Gas

• Plasma

Which state of matter has particles that can rapidly flow and be compressed?

• Solid

• Liquid

• Gas

• Plasma

What happens to the particles in a substance when it changes state?

• The particles change their chemical composition

• The particles change their physical appearance

• The particles change their temperature

• The particles remain the same but their arrangement and movement change