Grade 8 Density Quiz (a)

What does the kinetic molecular theory explain?

• How matter is made of tiny particles
• Why ice floats on water
• How heat travels through space
• What makes a balloon pop

Which state of matter has a definite shape and volume?

• Gas
• Liquid
• Solid
• Plasma

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

• They move faster
• They stay still
• They disappear
• They change color

Which of the following is an example of conduction?

• Boiling water
• A hot cup of cocoa warming your hands
• Ice melting in the sun
• A balloon popping

What is convection?

• Heat transfer through direct contact
• Heat transfer through liquids and gases
• Heat transfer through empty space
• Heat transfer through solids

Which of the following is an example of radiation?

• Feeling the warmth of the sun
• Boiling water on the stove
• Ice melting in a warm room
• A metal spoon getting hot in soup

What is buoyancy?

• The ability to float
• The weight of an object
• The temperature of water
• The speed of sound

Which object is likely to float in water?

• A rock
• A piece of wood
• A metal ball
• A glass marble

What does density measure?

• How heavy something is for its size
• How fast something moves
• How hot something is
• How much space something takes

If an object is denser than water, what will happen to it?

• It will float
• It will sink
• It will dissolve
• It will evaporate