Final Exam Review Part 1

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Indicators include color change, gas production, and temperature change.

Front

What is Newton's First Law of Motion?

Back

Newton's First Law states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It is calculated as the change in velocity divided by the time taken for that change.

Front

What is an example of a physical change?

Back

Freezing water is an example of a physical change, as it changes from liquid to solid without altering its chemical structure.

Front

What is an example of a chemical change?

Back

Rusting iron is an example of a chemical change, as it involves a reaction with oxygen that produces a new substance.

Front

What is the formula for calculating acceleration?

Back

The formula for acceleration (a) is: a = (final velocity - initial velocity) / time.

Front

What does a change in color indicate?

Back

A change in color often indicates a chemical change has occurred, suggesting that new substances have formed.

Front

What is the significance of Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.