8th Grade Science Semester Exam Review

Front

What is the identity of an unknown substance with a mass of 56.5 grams?

Back

Lead

Front

How do you solve for net force?

Back

To solve for net force, multiply mass and acceleration.

Front

What is the total number of atoms in the chemical formula C₆H₁₂O₆?

Back

24

Front

Where should a cracked Erlenmeyer flask be placed?

Back

Broken glass bin

Front

What does a graph showing a car's movement from 6 - 8 seconds indicate if it is sloping downwards?

Back

The car was slowing down.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What is acceleration?

Back

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

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes direction.