Percent Increase and Decrease Quiz
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AP Biology UNIT 8 Ecology 8.4 Effect of Density on Populations Video
Ever wondered how population density affects survival in ecosystems? In this video, we break down the effect of population density and how limited food, water, and living space can impact organisms. You'll learn how dense populations increase competition, spread disease faster, and change how species interact with their environment. We also explore how ecosystems like rainforests, savannas, deserts, and wetlands support different population sizes based on available resources and carrying capacit
8th - 12th, Adult Education, Higher Education
Biology, General Science, Other (Science)
CCSS
RST.11-12.1
, RST.11-12.2
, RST.11-12.3
+7
AP Biology UNIT 8 Ecology 8.2 Energy Flow Through Ecosystems Video Guide
Energy in ecosystems starts with the sun and flows through producers and consumers across trophic levels, with only ~10% transferred at each step. ⚡🌿 While energy flows one-way and is lost as heat, matter cycles—including the carbon, nitrogen, and phosphorus cycles—are continuously recycled. This video also covers bottom-up vs. top-down effects and how human activities like industrial agriculture disrupt nutrient cycles, causing issues like eutrophication. Perfect for AP Biology Unit 8.2 review
8th - 12th, Adult Education, Higher Education
Biology
CCSS
RST.11-12.1
, RST.11-12.2
, RST.11-12.3
+7
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