8th Grade Physical Science Review

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

Explain the Law of Conservation of Energy.

Back

Energy can neither be created nor destroyed, only converted from one form to another.

Front

Define force and provide an example.

Back

Force is a push or pull that can change the state of motion of an object. For example, when a person pushes a car to move it forward, they are applying a force to the car.

Front

How do waves transfer energy?

Back

Through the vibration of particles in the medium

Front

Describe the structure of an atom.

Back

The structure of an atom includes a nucleus composed of protons and neutrons, with electrons orbiting around the nucleus in specific energy levels.

Front

What are the properties of matter?

Back

Mass, volume, density, physical state

Front

What happens during a chemical reaction?

Back

Chemical bonds are broken and new bonds are formed, leading to the rearrangement of atoms.

Front

How is energy transferred in a closed system? Options: Via telekinesis, photosynthesis, and fermentation. Through processes such as conduction, convection, and radiation. By telekinesis, telepathy, and teleportation. Through photosynthesis, respiration, and fermentation.

Back

Through processes such as conduction, convection, and radiation.

Front

What is the relationship between force and motion?

Back

Newton's second law of motion describes the relationship between force and motion.

Front

How do electromagnetic waves differ from mechanical waves?

Back

Electromagnetic waves do not require a medium to travel through, while mechanical waves do.