What affects how well a plant grows Starter why is this tree so much taller than the others Success criteria name the factors that limit plant growth explain how the factors limit plant growth ID: 605946
Download Presentation The PPT/PDF document "Limiting factors" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Limiting factors
What affects how well a plant grows?
Starter: why is this tree so much taller than the others?! Slide2
Success criteria
name the factors that limit plant growth.explain how the factors limit plant growth.What affects how well a plant grows?Slide3
Think, pair, share
Group 1: what are the best conditions for plants to grow? Group 2: where do plants get their resources from? Group 3: why do most plants
not keep getting bigger and bigger and bigger? What affects how well a plant grows?Slide4
Photosynthesis and light – limiting factors
How does the
amount of light affect the rate of photosynthesis on this labelled graph?
As the amount of light increases, so does the
rate.
light intensity
rate of photosynthesis
Here,
increasing
the
amount of light has
no affect
on the rate. The limiting factor is now
carbon dioxide
or
temperature
.
What must be increased for the rate to increase?
1
2
1
2
What factors affect how well a plant grows?Slide5
Photosynthesis and carbon dioxide – limiting factors
How does the
amount of carbon dioxide affect the rate of photosynthesis on this labelled graph?
As the amount of carbon dioxide goes up, so does the rate. The limiting factor is
carbon dioxide
.
concentration of
carbon dioxide
rate of photosynthesis
Here, increasing the amount of carbon dioxide has
no
affect
on the rate.
Light or warmth
is now the limiting factor.
What must be increased for the rate to increase?
1
2
1
2
What factors affect how well a plant grows?Slide6
Photosynthesis and temperature – limiting factors
How does
temperature affect the rate of photosynthesis on this labelled graph?
As temperature increases, so does the rate because photosynthetic enzymes work best in the warmth. Here, the limiting factor is
temperature
.
temperature
rate of photosynthesis
0
o
C
45
o
C
Most plant enzymes are destroyed at about
40
°
C
. Here, photosynthesis stops and the rate falls to zero.
What is the limiting factor?
1
2
1
2
What factors affect how well a plant grows?Slide7
Check point
Use the Call my bluff cards.Are you True or Bluff? Write a TRUE or BLUFF definition we can play with. Slide8
Check point
Which of these is not a limiting factor?
1: temperature 2: Glucose 3: light What affects how well a plant grows?Slide9
Task
Collect your plant superheroes. Use the postit note to answer the following.
1) What are the limiting factors?2) What impact do these have on your character?3) How can they overcome them? What affects how well a plant grows?Slide10
Limiting factors
Complete the worksheet looking at these graphs.
What factors affect how well a plant grows?Name the factors that limit plant growth.Explain how the factors limit plant growth.Slide11
Think, pair, share
Plants that grow in a green house can be provided with resources.What should they be given and how would you provide it.
What affects how well a plant grows?Slide12
Task
Work through the past paper questions.Answer blanks.Mark the filled in answers using the marking scheme.
What affects how well a plant grows?Slide13
Plenary
Write an exam question of your own for limiting factors. Slide14
Call my bluff
Limiting factor – a factor which limits the rate of photosynthesis due to its lack of abundance. Limiting factor – a factor which is at its limit and therefore cannot increase further. Limiting factor – a factor which cannot be controlled and therefore limits what can be achieved.
What affects how well a plant grows?