Physical and Chemical Processes

A change in the physical properties of a substance does not change the nature of the substance.

• True

• False

Which one of the following is a physical property?

• Digestion

• Rusting

• Melting Point

• Ripening

____________ physical properties can be observed by the use of the five human senses without changing the nature of the substance.

• Qualitative

• Quantitative

______________ physical properties give numerical information with the use of measuring instruments.

• Quantitative

• Qualitative

Which one of the following is an example of a quantitative physical property?

• Electrical Conductivity

• Colour

• Odour

• State

A ____________ change occurs when a substance undergoes a physical change but can return to the original substance with the same physical properties.

• Chemical

• Reversible

• Physical

• Irreversible

An ___________ change occurs when a chemical change takes place and new products are formed.

• Reversible

• Physical

• Chemical

• Irreversible

_________________ is also known as burning which is a chemical change in which a fuel reacts with Oxygen.

• Hydration

• Decomposition

• Combustion

• Rusting

________________ is a chemical change occurring when a substance breaks down into two or more substances.

• Combustion

• Decomposition

• Hydration

• Rusting

__________ occurs when oxygen in the air combines with the iron in a nail and forms iron oxide which is brown and powdery.

• Combustion

• Decompostion

• Hydration

• Rusting