ocr-b4 04 energy from the sun
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B4-04 energy from the sunTRANSCRIPT
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Energy from the Sundescribe the process of photosynthesisexplain how energy made available in photosynthesis is used to make larger moleculesrelate cell structures to processes involved in photosynthesisH: recall the photosynthesis formulae
Keywords- photosynthesis, chemical reaction, chloroplasts, chlorophyll II, glucose, starch grains, cellulose, vacuole, cell wall, cell membrane, nucleus, cytoplasm
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Photosynthesis is one of the processes of life.
It is catalysed by enzymes and takes place inside plant cells and some microorganisms such as phytoplankton.
These cells have specialised structures to carry out photosynthesis.
Glucose made in photosynthesis is made into other molecules.
What is photosynthesis??
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Life on Earth is powered by the Sun.
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Light from the Sun takes 8 minutes to reach the Earth.
A green plant takes only a few seconds to capture part
of this energy and store it as chemical energy, in a
process called photosynthesis.
The word equation for photosynthesis is:
carbon dioxide + water glucose + oxygen
light energy
chlorophyll
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
On land, tropical rainforests capture more energy than
any other ecosystem.
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Photosynthesis also happens in the oceans.
Around half the light energy living things use is
harvested by phytoplankton.
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
The red and green areas show most phytoplankton
growing around continental shelves.
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Activity AB4.4.1 Collecting evidence
Watch the demonstration and consider the answers to questions 6-10 on the worksheet- you should answer the questions through the discussion and demonstration
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Watch the video and take some notes
How does this video show that photosynthesis is taking place?
http://www.youtube.com/watch?v=yBfx3OcXS6A
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Textbook Section D
describe the routes for glucose molecules synthesised during photosynthesis.
Activity AB4.4.3 How plants use glucoseCan be completed using the text book.
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
IB4.4.4 Energy from the Sun
© Oxford University Press 2011
Homework
Create a mind map from the notes made in the lesson that starts with the word photosynthesis in the middle of the page. The map should show your knowledge of photosynthesis
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