What Is Physical Science?

The universe began a little more than 13 billion years ago. It started (we think) with a huge flash of energy that is called the Big Bang. Everything in the universe (including Time) was created on that day. Since then the Universe has been getting larger and, as a result, colder, and more empty. 

Physical science is designed to give you insight into the fundamentals of how the universe began and operates by examining matter and energy. That covers a lot of territory because matter refers to all the “stuff” that exists in the universe. It includes everything you can see and many things that you cannot see, including the air around you. As well, nothing in our universe occurs without energy transfers thus providing matter with the opportunity to both move and change.  Electricity, heat, and light are some of the forms that energy can take.