B5 Plant Nutrition

Draw and label a plant cell

B5.1 Define Photosynthesis as the process by which plants manufacture carbohydrates from raw materials using energy from light

Challenge: Draw and label a root hair cell

B5 Plant Nutrition

What is photosynthesis?

B5.1 Define Photosynthesis as the process by which plants manufacture carbohydrates from raw materials using energy from light

Challenge: what are carbohydrates used for in humans?

An endothermic reaction

in which plants make carbohydrates

using energy from light.

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Takes in energy

B5 Plant Nutrition

What is the equation for photosynthesis?

B5.2 State the word and balanced chemical equation for photosynthesis

Word Equation

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water + carbon dioxide glucose + oxygen� �

H₂O + CO₂ C₆H₁₂O₆ + O₂�

Symbol Equation

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6H₂O + 6CO₂ C₆H₁₂O₆ + 6O₂�

Balanced Symbol Equation

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Light energy

Chlorophyll

B5 Plant Nutrition

B5.3-4 Explain that chlorophyll transfers light energy into chemical energy in molecules, for the synthesis of carbohydrates

Glucose is stored as starch

Because Starch is insoluble (does not dissolve)

Turns Blue-Black

1. Define: Photosynthesis

2. Write the word equation for photosynthesis

3. Write the chemical formula for photosynthesis and then balance the equation

4. What is the role of light in photosynthesis?

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B5 Plant Nutrition

B5.1 Define Photosynthesis as the process by which plants manufacture carbohydrates from raw materials using energy from light

B5 Plant Nutrition

What do plants use their glucose for?

B5.5 Outline the subsequent use and storage of carbohydrates made in photosynthesis

• Cellulose for strong Cell walls
• Respiration
• Amino acids for protein synthesis (nitrates from the soil)
• Insoluble starch for storage
• Lipids for storage in seeds

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Challenge: How do you test for starch?

CRASS

Seeds

Starch

Cellulose

Respiration

Amino Acids

1. Define photosynthesis
2. State the chemical and word equation (challenge: balanced)
3. State and give images for the uses of glucose in a plant
4. Propose an experiment to test the effect of light on the rate of photosynthesis
5. Explain what fertiliser is and how it works.
6. Give reasons for why plants do not grow or the leaves turn yellow.
7. Suggest an industry that could use your experiment to help them make increased profits
8. Challenge: Create a 5 to 10 question kahoot.
9. Challenge: Write a How to test for starch guide.

B5 Plant Nutrition

Create Photosynthesis Canva Presentation

B5.1 Define Photosynthesis as the process by which plants manufacture carbohydrates from raw materials using energy from light

Presentation Date: Thursday 6th March

· X__________ and p____________ are the transport tissue in plants

· X__________ carries _______________ and dissolved minerals from the roots to the l______________

· P____________ carries dissolved f__________ (sugar) from the leaves around the plant

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Tips

• Less than 25 words per slide

- Images and GIFs

- Same formatting

- Do not copy and paste from the internet

- Palm/Cue cards

B5 Plant Nutrition

Create Photosynthesis Canva Presentation

B5.1 Define Photosynthesis as the process by which plants manufacture carbohydrates from raw materials using energy from light

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1. Place your leaf in test tube.

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• Cover with ethanol.

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• Place in water bath & leave for 10 minutes.

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• Remove leaf carefully with tweezers.

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• Place leaf in beaker of boiling water.

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• Place leaf on spotting tile.

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• Add a few drops of iodine.

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• Record results.

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This helps to destroy the waxy cuticle & remove the chlorophyll

This softens the leaf

Iodine is brown. In presence of starch it turns blue/black.

B5 Plant Nutrition

Testing a leaf for starch

B5.6 Investigate the necessity for chlorophyll, light and carbon dioxide for photosynthesis, using appropriate controls

Before an experiment to test the rate of _______________, a plant needs to be _______________ by leaving it in a dark place for at least ___________ hours.

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To see if photosynthesis has taken place we test for _______________ using _______________.

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If starch is present the _____________ turns _____________.

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If there is no starch the _______________ stays _________.

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Photosynthesis

24

Leaf

Respiration

Iodine

Starch

48

Glucose

Brown

Blue/Black

Destarched

Dried out

B5 Plant Nutrition

Testing a leaf for starch

B5.6 Investigate the necessity for chlorophyll, light and carbon dioxide for photosynthesis, using appropriate controls

photosynthesis

destarched

48

starch

iodine

leaf

Blue-black

leaf

Brown

B5 Plant Nutrition

Try this virtual lab

B5.6 Investigate the necessity for chlorophyll, light and carbon dioxide for photosynthesis, using appropriate controls

https://www.reading.ac.uk/virtualexperiments/ves/preloader-photosynthesis-full.html

B5 Plant Nutrition

B5.7 Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis

1. Draw a version of the diagram in your book.
2. Explain what you think is happening in the experiment by deciding what the IV, DV and CVs are?

Look at the result table.

1. Describe the results [2]
2. Explain the results [2]
3. Sketch a graph of the results [2]

B5 Plant Nutrition

B5.7 Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis

Students investigated the effect of light intensity on the rate of photosynthesis.

The students measured the rate of photosynthesis by counting the number of bubbles of oxygen produced by pondweed in one minute.

The diagram shows the apparatus.

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(i)      The students changed the light intensity in the investigation.

Suggest how.

(ii)     To make their investigation fair the students should have controlled some variables. Give two control variables the students should have used in their investigation.

B5 Plant Nutrition

B5.7 Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis

B5 Plant Nutrition

B5.7 Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis

B5 Plant Nutrition

What would you feed your plant?

B5.10 Describe the importance of nitrate for making amino acids and magnesium for making chlorophyll and

B5.11 explain the effects of nitrate ion and magnesium deficiency on plant growth

B5 Plant Nutrition

B5.10 Describe the importance of nitrate for making amino acids and magnesium for making chlorophyll and

B5.11 explain the effects of nitrate ion and magnesium deficiency on plant growth

As well as water, carbon dioxide and light, a plant needs minerals.

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These are absorbed from the soil into the roots either by diffusion or active transport depending on the concentration gradient.

B5 Plant Nutrition

Research the following and complete

B5.10 Describe the importance of nitrate for making amino acids and magnesium for making chlorophyll and

B5.11 explain the effects of nitrate ion and magnesium deficiency on plant growth

Challenge: sketch or find an image of what your plants would look like for each deficiency

B5 Plant Nutrition

B5.8-9 Identify and describe the functions of chloroplasts, cuticle, guard cells and stomata, upper and lower epidermis, palisade and spongey mesophyll, xylem and phloem in leaves of a dicotyledonous plant

• Epidermis
• Waxy Cuticle
• Palisade Mesophyll
• Spongey Mesophyll
• Chloroplasts
• Air space
• Stomata
• Guard Cell
• Xylem (Water)
• Phloem (Food)

https://www.youtube.com/watch?v=co0JdqUlycg

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Waxy Cuticle

Chloroplasts

Palisade Mesophyll

Spongey Mesophyll

Air Spaces

Guard Cells

Stomata

Xylem

Phloem

Epidermis

Epidermis

1. Create a labelled 3D model of a leaf
2. Create a 3D model of a root hair cell
3. Build a xylem and phloem to join the Root Hair Cell to The Leaf
4. Describe how the water moves from the root to the leaves.
5. Challenge: What are the factors that speed up transpiration and why?

B5 Plant Nutrition

B5.8-9 Identify and describe the functions of chloroplasts, cuticle, guard cells and stomata, upper and lower epidermis, palisade and spongey mesophyll, xylem and phloem in leaves of a dicotyledonous plant

https://quizlet.com/_8djxz5?x=1jqt&i=28b19k

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B5 Plant Nutrition

B5.8-9 Identify and describe the functions of chloroplasts, cuticle, guard cells and stomata, upper and lower epidermis, palisade and spongey mesophyll, xylem and phloem in leaves of a dicotyledonous plant

4. Leaf Structure

How is the leaf adapted to its function?

To carry out photosynthesis

B5 Plant Nutrition

B5.8-9 Identify and describe the functions of chloroplasts, cuticle, guard cells and stomata, upper and lower epidermis, palisade and spongey mesophyll, xylem and phloem in leaves of a dicotyledonous plant

B5 Plant Nutrition

10 Quick Questions

Plenary

1. Glucose is used in respiration. Write a word equation & symbol equation for respiration.
2. Circle the useful product.
3. Make a list of the things that glucose is turned into.
4. Why does a plant also need mineral ions like magnesium?
5. What is the function of cellulose?
6. What is the function of amino acids?
7. What is the function of fats and oils?
8. How does the starch travel around the plant?
9. What is the importance of starch being insoluble?
10. How do plants prepare for winter when light is scarce?

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B5 Plant Nutrition

https://quizlet.com/_8n2izj?x=1jqt&i=28b19k

B5 Plant Nutrition

https://create.kahoot.it/share/b5-photosynthesis/c832b064-291e-4dcd-9714-097bd68e9df4

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B5 Plant Nutrition

https://forms.office.com/Pages/ResponsePage.aspx?id=KheSDBwaEUybg3pLxZlckfCWKUWRx4FArTzFC0TbyRFUMDUyTVFDRDlUT043RTRUQ0ZZMlpNSDk2SS4u

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