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National Science Digital Library: Smile: Habitat Overcrowding

For Teachers Pre-K - 1st
Experiment with crowd control in a garden. Students will test what happens to radish plants observing who survives, who gets the most food, water and sunlight.
Graphic
Curated OER

Merriam Webster: Visual Dictionary Online: Example of Algae

For Students 9th - 10th
Illustration of brown, red, and green alga.

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