Science 1st Semester Exam

Front

If an object is in motion, then you know that __ must be acting on it.

Back

Unbalanced forces are required to change the motion of an object.

Front

As energy transformations occur within a system, the total energy of the system __.

Back

The total energy of the system remains constant due to the law of conservation of energy.

Front

What happens to ALL objects when they are heated?

Back

All objects expand when heated due to increased kinetic energy of particles.

Front

The kilogram is the SI unit for __.

Back

Mass is the measure of the amount of matter in an object.

Front

This represents the average kinetic energy of the particles that make up a material.

Back

Temperature is a measure of the average kinetic energy of particles in a substance.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is kinetic energy?

Back

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

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state.

Front

What is the law of conservation of energy?

Back

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

Front

What is friction?

Back

Friction is a force that opposes the motion of an object.