Physical Science Final Review

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, often converting some of the energy transferred to the object into thermal energy.

Front

What type of bond is formed when one atom loses electrons to another atom?

Back

An ionic bond is formed when one atom loses electrons to another atom, resulting in opposite charges that attract each other.

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of each atom or ion present in a chemical formula.

Front

How does mass affect momentum?

Back

Momentum is the product of mass and velocity; therefore, an object with less mass will have less momentum than an object with greater mass moving at the same speed.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, but the total mechanical energy remains constant.

Front

Define mechanical energy.

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, often related to height in a gravitational field.

Front

What is the law of conservation of energy?

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 a chemical change?

Back

An example of a chemical change is the rusting of iron, where iron reacts with oxygen to form iron oxide.