7th Grade 1st Semester Final Exam

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 its velocity.

Front

What position does a roller coaster have the most kinetic energy?

Back

Position B, where the coaster is at its lowest point and moving fastest.

Front

What material is best for reducing force?

Back

Cotton balls are effective at reducing force due to their ability to compress and absorb impact.

Front

What type of energy transfer occurs during a collision?

Back

Energy transfer occurs during every collision, where kinetic energy is transferred between colliding objects.

Front

What is a dependent variable?

Back

The dependent variable is the variable that is being measured in an experiment.

Front

What is an independent variable?

Back

The independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What is a controlled variable?

Back

A controlled variable is a variable that is kept constant throughout an experiment to ensure that the results are valid.

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 happens to kinetic energy as speed increases?

Back

As speed increases, kinetic energy increases exponentially because it is proportional to the square of the speed.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to mass; as mass increases, kinetic energy increases if velocity remains constant.