Week 5 practice quiz

Is burning wood a chemical or physical change?

• chemical
• physical

Is glass breaking a chemical or phyiscal change?

• chemical
• physical

Which is the property of matter in which a substance can transfer heat or electricity?

• magnetism

• conductivity

• density

• solubility

Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?

• solubility

• conductivity

• magnetism

• density

Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?

• boiling point

• shape

• hardness

• odor

Which statement best compares and contrasts two physical properties of matter?

• Density and solubility are similar because they both involve water, but they are different because density involves dissolving a material and solubility involves floating or sinking a material.

• Density and solubility are similar because they both involve a material’s mass and volume, but they are different because density involves floating materials and solubility involves sinking materials.

• Boiling points and melting points are similar because they both involve changing the heat of a material, but they are different because boiling point involves adding heat to a material and melting point involves removing heat from a material.

• Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.

What happens when a substance undergoes a physical change?

• Some physical properties change, but the substance keeps its identity.

• No physical properties change, and the substance keeps its identity.

• Some physical properties change, and the substance changes its identity.

• No physical properties change, but the substance changes its identity.

What is an example of a physical change?

• having less ash than the paper that was burned to form it

• ice forming and then melting back into water

• rust having a different identity than the iron it forms on

• the irreversible reaction of vinegar and baking soda

The Statue of Liberty is made of copper that has turned green because it has undergone a change. What can be said about this change?

• The change is a physical change because the copper in the statue is still there.

• The change is a physical change because a new chemical is formed on the outside of the statue.

• The change is not a physical change because the color of the statue has changed.

• The change is not a physical change because a new chemical is formed on the outside of the statue.

A chemical property describes how matter __________.

• smells

• reacts with another type of matter

• looks under a microscope

• dissolves when made into a solution