1. Crossword Time!
See resources for worksheet

2. Photosynthesis and respiration
C/W
Date:……………………
Photosynthesis and respiration
Lesson Objectives
To describe what plants use glucose for.
To explain the differences between photosynthesis and respiration in plants.
Success Criteria
Define dependent and independent.
What can glucose be converted into.
Define respiration

3. Photosynthesis Carbon Dioxide + Water Oxygen + Glucose Sunlight
Photosynthesis - Clip

4. What do the plants use glucose (made by photosynthesis) for?

5. glucose What do plants with the glucose made by photosynthesis?
Some glucose is used straight away in respiration. Plants also carry out respiration to
release the energy they need for life processes.
glucose
Some glucose is converted into starch and other
substances for storage. These stores of energy
can be used later when the plant needs them.
Some glucose is used to make new chemicals
such as proteins, sugars and fats that the plant
also needs to function properly.

6. Glucose Starch Proteins Cellulose Fats and Oils
Used to make some glues and foam packaging.
Used to make some biodegradable plastics
Starch
Proteins
Nitrogen from nitrates
Glucose
Cellulose
Fats and Oils
Used in many perfumes, lubricant, paints and varnishes
Used to make paper

7. What new materials can you make from glucose?
P…………..
Nitrogen from nitrates
Glucose
C……………
F…. and O…..
Used in many perfumes, lubricant, paints and varnishes
Used to make paper

9. Investigating plants to find out what part contains the most sugar?
Carry out food tests on different parts of the plant.
Try to test carrot, onion, potato and different seeds. Investigation 12.7 Biology for You new edition ‘Food Plants’.
Alternatively complete the practical ‘Investigating plants to find out what part contains the most sugar?’

10. Starch in plants
Aim:
To investigate which foods contain starch.

11. Starch in plants
Results
Conclusion

12. glucose What do plants with the glucose made by photosynthesis?
Some glucose is used straight away in respiration. Plants also carry out respiration to
release the energy they need for life processes.
glucose
Some glucose is converted into starch and other
substances for storage. These stores of energy
can be used later when the plant needs them.
Some glucose is used to make new chemicals
such as proteins, sugars and fats that the plant
also needs to function properly.

13. What is photosynthesis?
light energy
chlorophyll
carbon dioxide + 
water
oxygen
glucose
What is the symbol equation for this reaction?
light energy 6
CO2 + 6
H2O + 
C6H12O2 6 O2
chlorophyll
Is this a balanced symbol equation?
How would you balance the equation?

14. What is respiration? Video

15. from the digestive system from the breathing system
What is respiration?
Respiration is the process that the body uses to release energy from digested food (glucose):
energy
oxygen
water
glucose
carbon
dioxide
from the digestive system
from the breathing system
useful!
waste product exhaled
This type of respiration is called aerobic respiration because energy is released with oxygen.

16. Plants as Food How?? GLUCOSE can be used by the plant in……………………………
Respiration = plants release energy from glucose
Glucose is converted into starch = Storage
Glucose is used to make new substances.

17. Describe what is being shown in the diagram in few sentences…..?

18. release the energy they need for life processes.
Photosynthesis and respiration
What do plants use glucose (made by photosynthesis) for?
Video Time
What is needed and made in cellular respiration?
Where does respiration happen?
Where does the glucose come from for respiration in plants?
4. Where is chlorophyll found in a plant and what does it do?
Some glucose is used straight away in respiration. Plants also carry out respiration to
release the energy they need for life processes.
glucose
Some glucose is converted into starch and other
substances for storage. These stores of energy
can be used later when the plant needs them.
Some glucose is used to make new chemicals
such as proteins, sugars and fats that the plant
also needs to function properly.

19. Photosynthesis or Respiration?? Video Questions
All living things get the energy they need to live from a chemical reaction called respiration.
Living cells respire. Aerobic respiration is the chemical reaction used to release energy from glucose.
glucose + oxygen → carbon dioxide + water (+ energy)
Notice that the word equation for respiration is the reverse of the word equation for photosynthesis.

20. Bright Sunlight
Carbon Dioxide
Oxygen
Respiration always takes place. However, more oxygen is produced by Photosynthesis than is used by Respiration.

21. Dim Sunlight Oxygen Carbon Dioxide
Respiration still takes place. This time the SAME amount of oxygen is produced by Photosynthesis that is used by Respiration.

22. Darkness
Respiration still takes place. Photosynthesis does not occur as there is no light. No oxygen is produced.

23. Photosynthesis v Respiration
Biology for You new edition
Experiment ‘Photosynthesis and respiration’. This can either be done as a class practical or a demo. There is also very good diagram on this page 192.

24. Is respiration taking place?
Tube 1 = Dark / Leaf / Hydrogen carbonate indicator
Tube 2= Light / leaf/ Hydrogen carbonate indicator
Tube 3 = Light / no leaf/ Hydrogen carbonate indicator
Carbon dioxide = Yellow colour!
During the daylight plants produce more oxygen by photosynthesis than they use up in respiration.
At night plants produce only carbon dioxide by respiration.

25. Complete the grid using the key sentences around the room!
Photosynthesis or
Respiration
Challenge!
Complete the grid using the key sentences around the room!

26. Conditions
Photosynthesis v respiration
Overall Result
Dark
Dim light
Bright light
Conditions
Photosynthesis v respiration
Overall Result
Dark
Dim light
Bright light

27. Respiration present
No photosynthesis

28. Photosynthesis rate
equals respiration
rate

29. Photosynthesis rate
is greater than
respiration rate

30. carbon dioxide given out
Oxygen is taken in
carbon dioxide given out

31. each cancels the other out
Neither gas is taken
in or given out, as
each cancels the other out

32. Carbon dioxide is taken in
oxygen is given out

33. Conditions
Photosynthesis v respiration
Overall result
Dark
Dim light
Bright light
Respiration Oxygen taken in No photosynthesis Carbon dioxide given out
Photosynthesis rate equals respiration rate
Neither gas is taken in or given out, as each cancels the other out
Photosynthesis rate greater than respiration rate
Carbon dioxide taken in Oxygen given out

34. Respiration v Photosynthesis
Complete the worksheet ‘respiration and Photosynthesis 1.’

35. Is respiration taking place?
During the daylight plants produce more oxygen by photosynthesis than they use up in respiration.
At night plants produce only carbon dioxide by respiration.

36. Multiple choice quiz Teacher notes
This multiple–choice quiz could be used as a plenary activity to assess students’ understanding of photosynthesis. The question can be skipped through without answering by clicking “next”. Students could be asked to complete the questions in their book and the activity could be concluded by the completion on the IWB.

37. Multiple-choice quiz

38. HOT SEAT! Volunteer needed.
You can only ask questions with a Yes or No answer.
Am I furry? Am I large?

39. Chloroplasts

40. stomata

41. Limiting Factors

42. Sunlight

43. Carbon dioxide

44. Temperature

45. Glucose

46. Leaf

47. Anagrams

48. Food Quiz

49. What are the products
of photosynthesis?
Glucose
Oxygen

50. What can glucose
be converted into ?
Starch
Proteins
Fats and Oils
Cellulose

51. Which part of the plant
do carrots come from?
Roots

52. True Humans gain energy from eating starch stored in plants.
True or False?
True

53. How is glucose stored
in the plant?
Starch

54. What do you use
to test for starch
in food?
Iodine Solution

55. If starch is present,
what colour appears?
Blue-Black