Science Class 10
Our Environment
Ecosystems, food chains and webs, energy up a chain, ozone loss, and sorting garbage.
11 lessons · ~71 min total
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Lessons in this topic
- 0 Start here Ecosystems, food chains, energy up a chain, ozone loss and sorting garbage. · 3 min You are here
- 1 An ecosystem, and its parts Living things and their surroundings, all linked. Some parts are alive, some are not. · 5 min
- 2 Producers, consumers and decomposers Living things make food, eat food, or feed on the dead. · 5 min
- 3 Food chains and food webs A chain is a straight line of who eats whom. A web is chains that cross. · 7 min
- 4 Trophic levels Each step in a food chain has a level number. Count from the producer. · 7 min
- 5 The flow of energy On average, only about a tenth reaches the next trophic level. · 8 min
- 6 Biological magnification A chemical that does not break down builds up. It builds up more at each higher level. · 8 min
- 7 Ozone depletion A thin layer high up blocks harmful UV. Gases called CFCs break it down. · 8 min
- 8 Managing garbage Sorting waste into biodegradable and non-biodegradable is the first step. · 8 min
- 9 The big picture Eight ideas about ecosystems, energy, ozone loss and sorting garbage. · 4 min
- 10 Track quiz The eight rules, then nine questions on ecosystems, energy and garbage. · 8 min
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