Chemical & Physical Changes Review

What is matter?

• Anything that has mass and takes up space

• Only solid objects

• Only liquids and gases

• Only things that can be seen

What was the original color of the Statue of Liberty?

• Green

• Blue

• Copper

• Silver

Which of the following is a physical property?

• Ability to burn

• Color

• Reactivity with acid

• Ability to rust

Why does the Statue of Liberty appear green today?

• It was painted green

• It is made of green metal

• The copper has oxidized over time

• It is covered in green algae

What is the formula to calculate density?

• Density = Volume × Mass

• Density = Mass + Volume

• Density = Mass ÷ Volume

• Density = Volume ÷ Mass

If a material has a higher density, how does it compare to a material with a lower density?

• It is lighter than the material with lower density.

• It is heavier than the material with lower density.

• It is the same weight as the material with lower density.

• It floats on water more easily than the material with lower density.

Given a copper cube with a mass of 1,120 g and a volume of 125 cm³, what is its density?

• 8.96 g/cm³

• 9.96 g/cm³

• 7.96 g/cm³

• 10.96 g/cm³

Why might you identify an object as metal based on its physical properties?

• Because it is transparent.

• Because it has a shiny appearance and high density.

• Because it is soft and flexible.

• Because it is colorful and light.

Which of the following is a chemical property of matter?

• Mass

• Density

• Reactivity

• Texture

What is an example of a physical change?

• Rusting of iron

• Burning of wood

• Melting of ice

• Baking a cake