We will learn The factors that affect the rate of plant growth. The idea of limiting factors....
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We will learn •The factors that affect the rate of plant growth. •The idea of limiting factors. Light intensity (Lux) Num berof bubbles per minute 0 0 5 17 10 27 15 36 20 43 25 46 30 48 35 52 40 60 45 60 50 60 Describe the pattern that the graph shows. Explain why the number of bubbles rises at first. Explain why the number of bubbles then stays the same. How could you get the plant to make more than 60
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Transcript of We will learn The factors that affect the rate of plant growth. The idea of limiting factors....
We will learn
• The factors that affect the rate of plant growth.
• The idea of limiting factors.
Light intensity
(Lux)
Number of bubbles per
minute0 05 17
10 2715 3620 4325 4630 4835 5240 6045 6050 60
Describe the pattern that the graph shows.
Explain why the number of bubbles rises at first.
Explain why the number of bubbles then stays the same.
How could you get the plant to make more than 60 bubbles per minute?
We will learn
• The factors that affect the rate of plant growth.
• The idea of limiting factors.
We will learn
• The factors that affect the rate of plant growth.
• The idea of limiting factors.
We will learn
• The factors that affect the rate of plant growth.
• The idea of limiting factors.
Carbon dioxide
Water
Temperature
Light
Colour of light
It is needed for photosynthesis and it helps the plant support its leaves
It is a raw material for photosynthesis
It provides energy for the chemical reaction
Chlorophyll can only absorb some types of light
It speeds up or slows down chemical reactions
A – To find out if temperature affects photosynthesis.
Temperature (oC) Number of bubbles in 1 minute 15 5 30 17 45 38 60 0
B – To find out if the colour of light makes a difference to photosynthesis.
Colour of light Number of bubbles in 1 minute blue 27
green 4 yellow 16
red 24 Cut out and stick in each results table and draw a bar chart to display
each set of results. Write a conclusion for each investigation.
What will the gas at X be?
Why did this covered leaf only have starch in its middle?
What would you see if this leaf was tested for starch?
Which leaf will have starch in it?
The graph shows how chlorophyll absorbs different wavelengths of light.
Why are trees green?
The indicator is red. It turns yellow when carbon dioxide is added or purple when carbon dioxide is taken from it.
What colour will each experiment go?
Say why you think that each step is needed when you tested the leaf for starch.
I boiled the leaf in water first so that…
What do the results show about the leaf?
