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This short online lesson explores the planet Mars.

This short online lesson explores the planet Mercury.

This short online lesson discusses the planet Neptune.

This short online lesson discusses the planet Saturn

This short online lesson discusses the planet Uranus.

This short online lesson discusses the planet Venus.

Using position-time graphs and number lines to find displacement and distance traveled.

This short YouTube video introduces you to the planets which make up the solar system.

This online resource explores the terrestrial, or inner, planets - the planets closest to the sun: Mercury, Venus, Earth and Mars.

This section introduces you to the realm of physics, and discusses applications of physics in other disciplines of study. It also describes the methods by which science is done, and how scientists communicate their results to each other.

Physics is a branch of science. The word science comes from a Latin word that means having knowledge, and refers the knowledge of how the physical world operates, based on objective evidence determined through observation and experimentation. A key requirement of any scientific explanation of a natural phenomenon is that it must be testable; one must be able to devise and conduct an experimental investigation that either supports or refutes the explanation. It is important to note that some questions fall outside the realm of science precisely because they deal with phenomena that are not scientifically testable. This need for objective evidence helps define the investigative process scientists follow, which will be described later in this chapter.