B10+-+Syllabus+Checklist

**﻿B10. Energy flow in ecosystems**

 * ======Serial No====== || ====== **Assessment Statement.**  ======

//All candidates should be able to://
|| ======Covered in Class====== || ======Revised @ home====== || ======I am certain====== || ======I need help====== ||
 * ====== 1  ====== || ======State that the Sun is the principal source of energy input to biological systems.====== ||   ||   ||   ||   ||
 * ====== 2  ====== || ======Define the terms:====== ||   ||   ||   ||   ||
 * || ======• //food chain// as a chart showing the flow of energy (food) from one organism======

(e.g. mahogany tree → caterpillar → song bird → hawk),
||  ||   ||   ||   ||
 * ^  || ======• //food web// as a network of interconnected food chains showing the energy flow through part of an ecosystem,====== ||   ||   ||   ||   ||
 * ^  || ======• //producer// as an organism that makes its own organic nutrients, usually using energy from sunlight, through photosynthesis,====== ||   ||   ||   ||   ||
 * ^  || ======• //consumer// as an organism that gets its energy by feeding on other organisms,====== ||   ||   ||   ||   ||
 * ^  || ======• //herbivore// as an animal that gets its energy by eating plants,====== ||   ||   ||   ||   ||
 * ^  || ======• //carnivore// as an animal that gets its energy by eating other animals.====== ||   ||   ||   ||   ||
 * ====== 3  ====== || ======Describe energy losses between trophic levels.====== ||   ||   ||   ||   ||
 * ====== 4  ====== || ======Define the terms:====== ||   ||   ||   ||   ||
 * || ======• //decomposer// as an organism that gets its energy from dead or waste organic matter,====== ||  ||   ||   ||   ||
 * ^  || ======•//ecosystem// as a unit containing all of the organisms and their environment, interacting together, in a given area e.g. decomposing log or a lake,====== ||   ||   ||   ||   ||
 * ^  || ======• //trophic level// as the position of an organism in a food chain or food web.====== ||   ||   ||   ||   ||
 * ====== 5  ====== || ======Explain why food chains usually have fewer than five trophic levels.====== ||   ||   ||   ||   ||
 * ====== 6  ====== || ======Describe the carbon cycle.====== ||   ||   ||   ||   || ﻿ ||
 * ====== 7  ====== || ======Discuss the effects of the combustion of fossil fuels and the cutting down of forests on the oxygen and carbon dioxide concentrations in the atmosphere.====== ||   ||   ||   ||   ||