More Related Content Similar to OCR-B4 04 energy from the sun (20) More from Traceywithane (13) 1. IB4.4.4 Energy from the Sun
Energy from the Sun
describe the process of photosynthesis
explain how energy made available in photosynthesis is used
to make larger molecules
relate cell structures to processes involved in photosynthesis
H: recall the photosynthesis formulae
Keywords- photosynthesis, chemical reaction,
chloroplasts, chlorophyll II, glucose, starch grains,
cellulose, vacuole, cell wall, cell membrane,
nucleus, cytoplasm
© Oxford University Press 2011
2. IB4.4.4 Energy from the Sun
What is photosynthesis??
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.
© Oxford University Press 2011
3. IB4.4.4 Energy from the Sun
Life on Earth is powered by the Sun.
© Oxford University Press 2011
11. IB4.4.4 Energy from the Sun
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:
light energy
carbon dioxide + water glucose + oxygen
chlorophyll
© Oxford University Press 2011
12. IB4.4.4 Energy from the Sun
On land, tropical rainforests capture more energy than
any other ecosystem.
© Oxford University Press 2011
13. IB4.4.4 Energy from the Sun
Photosynthesis also happens in the oceans.
Around half the light energy living things use is
harvested by phytoplankton.
© Oxford University Press 2011
14. IB4.4.4 Energy from the Sun
The red and green areas show most phytoplankton
growing around continental shelves.
© Oxford University Press 2011
15. IB4.4.4 Energy from the Sun
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
© Oxford University Press 2011
16. IB4.4.4 Energy from the Sun
Watch the video and take some
notes
How does this video show that
photosynthesis is taking place?
http://www.youtube.com/watch?v=yBfx3OcXS6A
© Oxford University Press 2011
17. IB4.4.4 Energy from the Sun
Textbook Section D
describe the routes for glucose molecules
synthesised during photosynthesis.
Activity AB4.4.3 How plants use glucose
Can be completed using the text book.
© Oxford University Press 2011
20. IB4.4.4 Energy from the Sun
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
In for next lesson
© Oxford University Press 2011
Editor's Notes A temperature map of the Sun's corona as recorded by the EIT instrument on SOHO Until now, scientists have only had a continuous record of photosynthesis on land. But following three years of continual data collected by the SeaWiFS instrument, NASA has gathered the first record of photosynthetic productivity in the oceans. By taking three years of continuous data as a whole, experts have been able to map trends and anomalies in the global circulation of carbon to a degree of detail than has never been done before. It is a baseline measurement to by which all future measurements will be compared. The SeaWiFS instrument looks at the world oceans and land to observe the plant life and phytoplankton.
