8th Grade Science Semester Exam Review

Front

What is the temperature shown on the thermometer?

Back

-12 °C

Front

Which part of an atom has a negative charge?

Back

Electron

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It is measured in meters per second squared (m/s²).

Front

How do you calculate acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time

Front

What is the formula for calculating force?

Back

Force = Mass x Acceleration (F = m x a)

Front

What is the net force acting on an object?

Back

The net force is the total force acting on an object when all the individual forces are combined.

Front

What is the unit of force?

Back

Newton (N)

Front

What is the mass of an object?

Back

Mass is a measure of the amount of matter in an object, typically measured in kilograms (kg).

Front

What is the relationship between mass and acceleration in Newton's second law?

Back

According to Newton's second law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is the significance of the Bohr model in atomic theory?

Back

The Bohr model describes the structure of atoms, where electrons orbit the nucleus at fixed distances.