8th Grade Science Semester Exam Review

Front

What should you do with a cracked Erlenmeyer flask?

Back

Place it in the broken glass bin.

Front

How does a toy train's motion change when it moves forward?

Back

It moves forward at a constant speed, slows down, and then stops.

Front

How do you calculate net force?

Back

Multiply mass and acceleration.

Front

Which of the following is NOT a safe laboratory practice?

Back

Mixing chemicals before reading instructions.

Front

What does a car traveling at 50 km/h in a northeasterly direction represent?

Back

Velocity.

Front

What is the definition of speed?

Back

The distance traveled per unit of time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity; velocity is a vector quantity that includes direction.

Front

What is acceleration?

Back

The rate of change of velocity over time.

Front

What is the formula for calculating acceleration?

Back

(Final velocity - Initial velocity) / Time.

Front

What safety equipment should be worn during experiments?

Back

Safety goggles.