2. Animated Ecological Footprint By: Rachel Malinowski Kelly Hare Meaghan Bence Leila Kessler Dan Rockwell

3. An "ecological footprint" is the amount of land that it takes to support one individual. The components of the footprint include cropland used for food, grazing land, forest land used for wood for housing and other consumer goods, a measure of the amount of land it takes to provide energy (This includes consideration of the effect of CO2 emissions.), sea area used for fishing and land used for building and transportation. Of these, the largest component in North America is?

4. At each level of a food chain, about _____ of the energy is lost in the form of heat. Thus, the total energy passed from one level to the next is only about _____. 90%; 10%

5. Organisms that can take energy from inorganic sources and fix it into energy rich organic molecules are called: Autotrophs

6. Primary consumers in ecosystems are: Herbivores

7. Normally ecosystems have about _______ trophic levels. One or Two

8. Anaerobic breakdown of organic food sources in cells is called: Respiration

9. About _____ of the Earth's land surface is now used to cultivated crops or for human settlement. Another_____ is used for the purpose of feeding livestock. 10% to 15%; 6% to 8%

10. The energy content of 1 gram of dry plant matter is about: 4.25 kcal

11. 98% of the free carbon on earth is: In the ocean Global Sequestration Capacity