Semester Exam Review

Front

What is the atomic number of aluminum?

Back

13

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is Newton's second law of motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is an independent variable in an experiment?

Back

The variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged, but they are not created or destroyed.

Front

What is a crash test dummy used for?

Back

To simulate human responses in car crash tests.

Front

What is the purpose of boiling water?

Back

To change water from a liquid to a gas (steam) by adding heat.

Front

What are bubbles in boiling water made of?

Back

Water molecules.

Front

What is the significance of using strong materials in crash test dummies?

Back

To ensure that the dummy can withstand the forces of a crash without breaking.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.