Class Clips is changing
We will be introducing the new Knowledge and Learning Beta website over the coming months. Clips for use in the classroom are now available on your phone, tablet or PC.

Alternatively, you can still browse or search by keyword or clip number on this site.

CLIP 201

Food chains - pyramid of numbers

Food chains - pyramid of numbers

Did you know?

All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.

Key Info
  • Food chains - pyramid of numbers
  • Duration: 01:16
  • A pyramid of numbers is explained in terms of a food chain. The presenter looks at a food chain in which about ten percent of the energy of each level is passed on to the next higher level. For example, one fox must eat seventy rabbits per year to survive, and each rabbit must consume 20,000 blades of grass. This is what is known as a pyramid of numbers.
  • Subject:



    Bio: Energy

  • Keywords: energy, interdependence, ecosystem, pyramid of numbers, food chain
Ideas for use in class
  • Use this clip to introduce a pyramid of numbers.
Background details
  • Clip language : English
  • Aspect ratio : 4x3

BBC navigation

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.