Lesson 21: Flow of Matter



All organisms, including humans, require matter and energy to live. In this lesson, you will review what you've learned previously about energy and learn how it can be transformed and transferred from organism to organism.



CC-BY-SA licence. Attribution goes to "Roberta Rosina, DensityDesign Research Lab"

In this lesson, you will:

  • review energy and where it comes from
  • learn how energy flows through the biosphere
  • learn how energy is transferred from organism to organism by way of food chains
  • learn why less energy is available as you move up the energy pyramid



Key terms for this lesson:

  • energy
  • photosynthesis
  • glucose
  • starch
  • cellular respiration
  • biosphere
  • ecosystem
  • food chain
  • food web
  • producers
  • consumers
  • decomposers
  • secondary consumer
  • tertiary consumer
  • ecological or energy pyramid