8th Grade Science Semester Exam Review

Front

What does the Law of Conservation of Mass state?

Back

The mass in chemical reactions cannot be created nor destroyed, just rearranged.

Front

What does a safety symbol indicating corrosive chemicals mean?

Back

Caution: Chemicals in this lab are corrosive.

Front

How do you calculate acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What happens to an object when acted on by unbalanced forces?

Back

The object will accelerate.

Front

What should a student do first if they drop a beaker?

Back

Tell the teacher about the accident.

Front

Define acceleration in physics.

Back

Acceleration is the rate of change of velocity of an object.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into different substances (products).

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.

Front

What is the purpose of a control in an experiment?

Back

A control is used as a standard for comparison to ensure that the results are due to the variable being tested.