California State Parks
Energy Flow Through an Ecosystem
One of the key concepts in life science and biology is the cycling of energy throughout an ecosystem. Learners can take notes on the topic using the vocabulary included within the presentation. From producers making their own food...
Biology Junction
Plant Structure and Function: Roots, Stems, and Leaves
Scientists found fossils of plants more than 420 million years old—but plants existed for up to 100 million years prior to these fossils. Learn about the importance of plants to the entire planet. Viewing a presentation helps scholars...