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apes - trophic levels & energy flow

originally streamed in 2019 with Joshua NielsenTeacher
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Learn how energy flows through ecosystems and understand trophic levels for your AP Environmental Science exam. This video breaks down the 10% rule, ecological pyramids, and energy transfer to help you review Unit 1 concepts. You'll explore how orga ...more

covered in this stream

units
Unit 1 – The Living World: Ecosystems
topics
1.8 Primary Productivity1.9 Trophic Levels1.10 Energy Flow and the 10% Rule

timestamps

  • 0:00

    Introduction to Energy Flow

  • 1:35

    Lesson Plan Overview

  • 2:41

    Photosynthesis Basics

  • 3:42

    Cellular Respiration

  • 4:44

    Sunlight Usage by Plants

  • 5:48

    Gross Primary Productivity

  • 6:52

    Net Primary Productivity

  • 8:25

    Energy in Biomes Graph

  • 9:31

    Open Ocean Energy Reasons

  • 11:06

    Ecological Pyramid Introduction

  • 12:09

    Producers and Autotrophs

  • 13:13

    Heterotrophs and Consumers

  • 14:46

    Herbivores and Carnivores

  • 16:24

    Omnivores in Food Webs

  • 16:56

    The 10% Rule

  • 19:33

    Biomass and Organisms Application

  • 21:08

    Real Pyramid Examples

  • 23:13

    Chicken and Cricket Example

  • 25:18

    Soybeans to Beef Math

  • 27:22

    Herbivore vs Carnivore Efficiency

  • 30:11

    Land Usage Comparison

  • 32:13

    Laws of Thermodynamics

  • 34:18

    First Law Visualization

  • 36:23

    Second Law Entropy

  • 38:28

    Entropy Examples

  • 42:37

    Personal Entropy Stories

  • 44:10

    Topic Summary Recap

  • 47:16

    Primary Productivity Recap

  • 50:51

    Ecosystems and Biodiversity

  • 53:28

    Closing Remarks

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Study Content & Tools

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Company

What's New?PricingBulk DiscountsTestimonialsFAQsEmail us

Resources

AP Exam Schedule 2027AP ClassesAP ClassroomEasiest AP ClassesHardest AP ClassesAP vs IBAP vs Dual EnrollmentAP vs Honors ClassesAP Scholar Awards

history

🌎 ap world history🇺🇸 ap us history🇪🇺 ap european history

social science

✊🏿 ap african american studies🗳️ ap comparative government🚜 ap human geography💶 ap macroeconomics🤑 ap microeconomics🧠 ap psychology👩🏾‍⚖️ ap us government

english & capstone

✍🏽 ap english language📚 ap english literature🔍 ap research💬 ap seminar

arts

🎨 ap art & design🖼️ ap art history🎵 ap music theory

science

🧬 ap biology🧪 ap chemistry♻️ ap environmental science🎡 ap physics 1🧲 ap physics 2💡 ap physics c: e&m⚙️ ap physics c: mechanics

math & computer science

🧮 ap calculus ab♾️ ap calculus bc📐 ap precalculus📊 ap statistics💻 ap computer science a⌨️ ap computer science p

world languages

🇨🇳 ap chinese🇫🇷 ap french🇩🇪 ap german🇮🇹 ap italian🇯🇵 ap japanese🏛️ ap latin🇪🇸 ap spanish language💃🏽 ap spanish literature

go beyond AP

high school exams

✏️ PSAT🎓 Digital SAT🎒 ACT

honors classes

🍬 honors algebra II🫀 honors anatomy🐇 honors biology👩🏽‍🔬 honors chemistry💲 honors economics📐 honors geometry⚾️ honors physics📏 honors pre-calculus📊 honors statistics🗳️ honors us government🇺🇸 honors us history🌎 honors world history

college classes

👩🏽‍🎤 arts👔 business🎤 communications🏗️ engineering📓 humanities➗ math🧑🏽‍🔬 science💶 social science

hs classes

🏛️ alabama history⛰️ appalachian studies🌴 california history🌍 earth science🌐 ethnic studies🐊 florida history🍑 georgia history🌎 global studies🌺 hawaiian studies📰 journalism🪶 native american studies🌵 new mexico history🤠 oklahoma history⚗️ physical science🎙️ speech and debate🤝 texas government🤠 texas history🌲 washington state history🕊️ world religions
RefundsTermsPrivacyCCPAAI TransparencySchool Data Privacy

© 2026 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.