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.
PowerPoint with Audio. Part of the Living on Planet Earth series. This presentation includes colorful images and illustrations that describe how plants make their own food through the process of photosynthesis. It also provides basic concepts as to how plants and animals breathe and obtain nutrition.