Do you know why it's called a watt? an ohm? a volt? Your students will know after this thorough history. From amber and fur (600 B.C.) to jumping frogs (1786) to electrical resistance (1827), this unit is a fantastic introduction to the history of electricity.
Two fact-filled and easy-to-understand reading comprehensions, explaining and defining light. Our light units are available at four different levels, with increasingly advanced vocabulary and concepts.