Part 1: Final Exam Review Fall 2024 8th Grade Science

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass of the object and the square of its velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a raised object has gravitational potential energy.

Front

What is the unit of mass?

Back

The unit of mass is the gram (g).

Front

What are magnetic field lines?

Back

Magnetic field lines are invisible lines that represent the direction and strength of a magnetic field. They can be visualized using iron filings.

Front

What is the relationship between force and mass?

Back

According to Newton's second law, the force required to move an object is directly proportional to its mass. More mass requires more force.

Front

What is the difference between an empty bucket and a full bucket in terms of force required to move them?

Back

An empty bucket requires less force to move than a bucket full of sand because the full bucket has more mass.

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for potential energy?

Back

The formula for gravitational potential energy (PE) is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the role of gravity in potential energy?

Back

Gravity is the force that gives potential energy to an object based on its height above the ground.

Front

What is an example of kinetic energy in everyday life?

Back

A moving car, a running athlete, or a flowing river are all examples of kinetic energy.