Starter quiz
- What is the function of stomata?
- To allow gas exchange ✓
- To store nutrients
- To support the plant
- To transport water
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- Which parts of a plant are involved in the transpiration stream?
- Flowers, fruits, and seeds
- Roots, stem, and leaves ✓
- Stem, branches, and seeds
- Roots, flowers, and leaves
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- What role do chloroplasts play in a plant cell?
- They carry out photosynthesis ✓
- They provide structural support
- They store water
- They transport nutrients
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- What is the primary function of the xylem in plants?
- To carry out photosynthesis
- To store nutrients
- To transport sugars
- To transport water and minerals ✓
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- How do guard cells regulate the opening and closing of stomata?
- By absorbing carbon dioxide
- By changing shape to open or close the stomata ✓
- By producing chlorophyll
- By storing water
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- What is the role of the phloem in plants?
- To provide structural support
- To store nutrients
- To transport sugars ✓
- To transport water
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Exit quiz
- What is the effect of increased light intensity on water uptake?
- It decreases water uptake
- It has no effect on water uptake
- It increases water uptake ✓
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- What is the effect of increased air movement on water uptake?
- It decreases water uptake
- It has no effect on water uptake
- It increases water uptake ✓
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- Why does higher temperature increase water uptake?
- It decreases the rate of transpiration
- It has no effect on transpiration
- It increases the rate of transpiration ✓
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- What are the main environmental factors affecting water uptake in plants?
- Light intensity, plant species, soil type
- Nutrient availability, water quality, plant species
- Light intensity, temperature, air movement ✓
- Soil type, plant age, humidity
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- Why is water uptake important for photosynthesis?
- Water helps in transporting glucose
- Water is a reactant in the photosynthesis process ✓
- Water provides energy for photosynthesis
- Water stabilises the chloroplasts
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- How does increased air movement enhance transpiration?
- By increasing water absorption through roots
- By preventing water loss from the leaf
- By quickly removing water vapour from the area surrounding the leaf ✓
- By reducing the temperature of the leaf
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Compare data on rate of water uptake by a plant at a range of light intensities.
- Identify a pattern or trend in the data.
- Higher light intensity increases transpiration rate as stomata open wider to increase gas exchange for photosynthesis.
- Increased temperature and air movement also increase the rate of water uptake.
- Higher temperature and air movement increase transpiration due to increased diffusion of water out through stomata.
Common misconception
Some students may struggle to explain how transpiration is affected by a number of factors, even though these factors have the same effects on everyday activities such as drying hair or clothes.
Links between these everyday events and transpiration have been made and illustrated simultaneously, so students make the link between the two.
Keywords
Photosynthesis - a series of chemical reactions in the cells of producers, which use carbon dioxide and water to make glucose and oxygen, requiring light
Light intensity - the amount of light reaching a given area in a given time
Stomata - pores in the leaf through which water, oxygen and carbon dioxide can diffuse
Transpiration - the loss of water from a plant’s leaves
Trend - a pattern in data
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