Ch. 7 Exam- Physical Science

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its height or position relative to the ground.

Front

What factors affect kinetic energy?

Back

Kinetic energy increases with the mass and speed of an object.

Front

What does the law of conservation of energy state?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an example of energy transformation in an automobile engine?

Back

When gasoline is burned in an automobile engine, its chemical energy is transformed into mechanical energy to power the vehicle.

Front

What unit is energy measured in?

Back

Energy is measured in joules.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion.

Front

How does height affect potential energy?

Back

The higher an object is positioned, the greater its potential energy due to the gravitational force acting on it.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases.

Front

What is an example of a device that utilizes the principles of energy transformation?

Back

Refrigeration is a device that utilizes energy transformations to remove heat from a space.

Front

What happens to energy when gasoline is burned?

Back

When gasoline is burned, its chemical energy is transformed into other forms of energy, such as thermal and mechanical energy.