eLearning Matter Practice

Which of the following is an example of a physical change?

• Water freezing into ice

• A piece of wood burning

• A toy car rusting

A physical change occurs when a substance _____. 

• breaks into individual elements
• becomes a new substance
• changes from an acid to a base
• changes shape, size, and form

What happens when a piece of wood burns?

• A physical change takes place.
• A chemical change takes place.
• The wood loses its gravity.
• The wood loses its inertia.

The mixture shown here -

• Maintains its physical properties when combined

• Dissolves after being stirred together

• Will evaporate after a certain period of time

• Cannot be separated into ingredients

What type of change has occurred when a nail rusts?

• A physical change

• A chemical change

• An atomic change

• A reactive change

How does rust form?

• Through paint flaking off of a metal surface

• Through a chemical reaction between iron and oxygen

• Through weathering

• Through the physical mixing of iron and water

What is a chemical property?

• Describes how it can react in a chemical reaction
• Describes the appearance or characteristics of a substance
• Creation of a new substance with new properties
• Change in appearance of a substance

What is a physical property?

• Describes how it can react in a chemical reaction
• Describes the appearance or characteristics of a substance
• Creation of a new substance with new properties
• Change in appearance of a substance

 Mark is observing a burning candle. He notices the melted wax drips down the side of the candle and hardens again. The candle has _________

• A. formed a new substance
• B. undergone a physical change 
• C. undergone a chemical change
• D. undergone a physical and chemical change

A student weighed a glass of water before and after adding ice cubes. The student waited until the ice cubes melted and then weighed the glass of water again. Which describes the weight of the water after the ice cubes melted?  

• A. The weight of the water after ice cubes melted is equal to the weight of the water with the frozen ice cubes.
• B. The weight of the water after ice cubes melted is less than the weight of the water with the frozen ice cubes. 
• C. The weight of the water after ice cubes melted is more than the weight of the water with the frozen ice cubes.