What is density?

• The mass of a substance compared to it's volume

• How heavy an object is

• The size of an object

• The volume of the object divided by mass

Which equation links density, mass and volume?

• Density = mass ÷ volume

• Density = volume ÷ mass

• Density = mass² ÷ volume

• Density = volume² ÷ mass

Which change is state takes place when a solid turns to a liquid?

• Melting

• Freezing

• Boiling

• Evaporating

Which change is state takes place when a liquid turns to a solid?

• Melting

• Freezing

• Boiling

• Evaporating

Which change is state takes place when a liquid turns to a gas?

• Melting

• Freezing

• Boiling

• Evaporating

Which change is state takes place when a liquid turns to a gas at the fastest rate possible?

• Melting

• Freezing

• Boiling

• Evaporating

Which change is state takes place when a solid turns to a gas?

• Melting

• Sublimation

• Boiling

• Evaporating

Which type of change produces new products?

• Chemical change

• Physical change

Which type of change can be reversed?

• Chemical change

• Physical change

Which type of change are changes in state?

• Chemical change

• Physical change