Extras

    Video thumbnail: Science Trek States of Matter Video Short

    Science Trek

    States of Matter Video Short

    Learn about the types of matter in the universe in this video short.

    States of Matter Video Short

    Video thumbnail: Science Trek The Web Show: States of Matter

    Science Trek

    The Web Show: States of Matter

    Find out why matter and its states is important in this Science Trek: The Web Show.

    The Web Show: States of Matter