Matter Review 1

Which of the following properties is a chemical property? 

• flammability
• malleability
• hardness
• color

Rusting is an example of a 

• physical property. 
• physical change. 
• chemical property.
• chemical change.

Which of the following statements describes a chemical change? 

• clear water turns red after a dye is added 
• ice melts
• salt dissolves in water
• milk sours

What happens if a piece of wood that is less dense than water is placed in water? 

• The wood sinks about halfway into the water.
• The wood displaces a quantity of water greater than its volume. 
• The wood settles to the bottom of the water.
• The wood floats on top of the water.

Which of these is LEAST likely to occur when ice melts? 

• The material changes in shape. 
• The material changes its reactivity. 
• The material changes its density. 
• The material changes its state of matter. 

Which of the following is NOT a chemical change? 

• metal rusting
• ice melting
• food digesting
• wood rotting

Joey and Jane thought that brownies might be more dense than cakes. Which of the following would be the BEST test of this hypothesis? 

• Eat samples of brownies and cake. 
• Compare the volumes of different size slices of brownie and cake. 
• Compare the masses of same size slices of brownie and cake. 
• Find out how many of their friends prefer brownies to cake. 

When oxygen in the air reacts with iron, iron oxide forms. Which statement is correct? 

• This is a physical change.
• This is a chemical change. 
• Iron and Iron oxide have the same properties. 
• Oxygen and iron have similar properties. 

Which of the following statements about chemical properties is true? 

• They can be observed when the identity of the substance changes.
• The can always be observed without changing the identity of the substance. 
• They are easier to observe than physical properties. 
• They are the properties most useful in identifying a substance. 

A chemical change takes place during a laboratory investigation of the properties of magnesium. Which of the following have been observed? 

• Magnesium melts at 649*C. 
• Magnesium becomes malleable when it is heated. 
• Magnesium conducts an electrical current. 
• Magnesium burns in the presence of oxygen.