[Free Registration/Login may be required to access all resource tools.] Explores the criteria of a scientific hypothesis and why a hypothesis cannot be proven true.

[Free Registration/Login may be required to access all resource tools.] Definition of acceleration and examples.

[Free Registration/Login may be required to access all resource tools.] Gene therapy is the insertion of genes into a person's cells to cure a genetic disorder. Could gene therapy be the cure for AIDS? No, AIDS is caused by a virus. Gene...

[Free Registration/Login may be required to access all resource tools.] Definition of temperature, how it is measured and the three temperature scales.

[Free Registration/Login may be required to access all resource tools.] What a solution is and its different parts, definition of soluble and insoluble. Solutions in different states of matter.

[Free Registration/Login may be required to access all resource tools.] Definition of sound, what sound waves are, how they are generated and what media they can travel through.

[Free Registration/Login may be required to access all resource tools.] Definition of wave speed and how it is related to wavelength and wave frequency, how to calculate wave speed and how it is related to the medium of a wave.

[Free Registration/Login may be required to access all resource tools.] Definition of concentration of a solution, the difference between concentrated and dilute solutions and how to calculate the concentration of a solution.

[Free Registration/Login may be required to access all resource tools.] Usefulness and types of graphs.

[Free Registration/Login may be required to access all resource tools.] Microwaves and their uses, and how cell phones and radar work.

[Free Registration/Login may be required to access all resource tools.] Explores electrons and their place in atoms.

[Free Registration/Login may be required to access all resource tools.] Definition of convection, how it occurs, and examples of convection.

[Free Registration/Login may be required to access all resource tools.] The process of cell division in eukaryotic cells is carefully controlled. The cell cycle is the life cycle of a cell, with cell division at the end of the cycle....

[Free Registration/Login may be required to access all resource tools.] Discusses elements and their different properties, the history of elements, and how atoms relate to elements.

[Free Registration/Login may be required to access all resource tools.] Ohm's law and how to use it to calculate current.

[Free Registration/Login may be required to access all resource tools.] Explains what an electric circuit is, its different parts, and how to represent it using a circuit diagram.

[Free Registration/Login may be required to access all resource tools.] Explains what electric current and voltage are and why electric current occurs.

[Free Registration/Login may be required to access all resource tools.] Definition of motion and how it is related to frame of reference.

[Free Registration/Login may be required to access all resource tools.] Definition of force, how it relates to motion, and force as a vector.

[Free Registration/Login may be required to access all resource tools.] DNA contains the instructions to create proteins, but it does not make proteins itself. DNA is located in the nucleus, which it never leaves, while proteins are made...

[Free Registration/Login may be required to access all resource tools.] How winds form ocean waves.

[Free Registration/Login may be required to access all resource tools.] Examines nuclear fusion in stars and simulated in particle accelerators.

[Free Registration/Login may be required to access all resource tools.] Describes causes of increased population growth.

[Free Registration/Login may be required to access all resource tools.] Covers convergent plate boundaries where an oceanic plate meets a continental plate.