Test Review: Matter - Properties & Changes

Breaking a chemical bond _____.

• A) absorbs energy from the surroundings
• B) creates energy that did not previously exist
• C) releases energy into the surroundings
• D) uses up energy that then no longer exists

An exothermic reaction _____.

• A) absorbs thermal energy
• B) needs energy to be added constantly in order to continue
• C) needs more energy to break the chemical bonds than is released when products forms
• D) releases thermal energy

The following are examples of physical properties except ____.

• A) ability to dissolve in water
• B) ability to react with oxygen
• C) density
• D) shape

A characteristic of matter that allows it to change to something new is a ____.

• A) chemical change
• B) chemical property
• C) physical change
• D) physical property

____ is a physical property.

• A) Density
• B) Flammability
• C) Combustibility
• D) Oxidation

When a peeled banana turns black, it is a ____.

• A) change of state
• B) chemical change
• C) physical change
• D) thermal change

A piece of metal is placed in a clear solution. Bubbles form and the metal disappears. The mass of the final solution is less than the mass of the first solution and the metal. Is this an exception to the law of conservation of mass? Explain.

• It is an exception, because the bubbles should be measured in the final product.
• It is not an exception, the gas bubbles released so they are not measured in final product.
• The atoms of the metal were destroyed because of the chemical reaction. This is apparent because it disappeared.

• The liquid must have been a strong acid and destroyed all the atoms of the metal.

The ability to react with oxygen is a physical property.

• True
• False

The melting point of silver is a ____.

• A) chemical change
• B) chemical property
• C) physical property
• D) physical change

An example of a chemical property is ____.

• A) ability to be attracted by a magnet
• B) ability to react with acid
• C) boiling point
• D) solubility