Week 9: Energy Flows. Chapter 14. WEEK 9: Energy Flows. LEARNING OUTCOMES By the end of this week, you should: Be able to describe the ways in which energy flows through ecosystems. Recognise that matter cycles within ecosystems.
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By the end of this week, you should:
Discuss a definition for these 8 words with the person next to you.
Check your understanding by choosing the correct definition from the next slide.
Complete Quick-check questions on page 446 – Nature of Biology
How do we lose energy to the environment?
What is the effect of maintaining a constant body temperature?
The rule of thumb: the useful chemical energy leaving one trophic level is typically only 10% of the energy entering that level.
waste growth energy
body temperature biomass plants
respiration energy movement food chain
Food Chains and Webs
Where does the energy originate from?
What happens to this energy as you go through the food chain?
What do the arrows represent?
Where is energy lost?
Complete the Quick-check questions – page 452
Numbers, Biomass, Energy
clover trophic level is typically only 10% of the energy entering that level.
An oak tree is very large so many insects can feed on it.
Fleas are very small and lots of them can feed on a rabbit.
stinging nettles caterpillars robin
marine plants small fish large fish seals polar bear
Complete Quick-check questions page 454 trophic level is typically only 10% of the energy entering that level.
Complete the worksheet
The Carbon Cycle
The Nitrogen Cycle
The Water Cycle
Complete the Quick-check questions on page 467 trophic level is typically only 10% of the energy entering that level.
Complete the poster task on biochemical cycles trophic level is typically only 10% of the energy entering that level.
False – combustion releases carbon dioxide gas
False – more is found in marine organisms and limestone rock deposits
False – both animals and plants respire
False – they respire and release carbon dioxide
False – scientists think it will cause global warming