AQA GCSE biology paper 3 Watch

Poll: How did you find AQA B3?
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ddudderidge01
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How did everyone find it??
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Dysf(x)al
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(Original post by ddudderidge01)
How did everyone find it??
Found it easy, although 5bii (the plant in a plastic box) was tough. I said the rate would decrease because the insides of the box would be saturated, but other people talked about carbon dioxide.
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ddudderidge01
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(Original post by TheMindGarage)
Found it easy, although 5bii (the plant in a plastic box) was tough. I said the rate would decrease because the insides of the box would be saturated, but other people talked about carbon dioxide.
The question was about transpiration so I don't think CO2 would be right... I put there would be no wind so less evaporation from the leaves so slower rate of transpiration.
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3317752
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(Original post by ddudderidge01)
The question was about transpiration so I don't think CO2 would be right... I put there would be no wind so less evaporation from the leaves so slower rate of transpiration.
yes. the concentration gradient would get LESS steeper as time went on
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ddudderidge01
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(Original post by Pretish)
yes. the concentration gradient would get LESS steeper as time went on
CO2 is to do with photosynthesis, not transpiration. Transpiration is the evaporation of water from the leaves of plants.
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3317752
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(Original post by ddudderidge01)
CO2 is to do with photosynthesis, not transpiration. Transpiration is the evaporation of water from the leaves of plants.
ik. as time went on, the concentration of water molecules would increase as the glass prevents them from escaping. hence the rate is slower.
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Mystery Panda
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I found paper 1 easiest, paper 2 was OK not the worst but it was challenging, and then the 3rd paper I had no idea I probably received an F for that paper I did not understand anything! ;(
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Dysf(x)al
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(Original post by ddudderidge01)
The question was about transpiration so I don't think CO2 would be right... I put there would be no wind so less evaporation from the leaves so slower rate of transpiration.
I think some people did mention wind.

The carbon dioxide was because of stomata opening or closing. I did think about that but I couldn't figure out which way it would go (would they open to allow more carbon dioxide in or would they close to slow photosynthesis). I just decided not to write about it - I stuck with water.
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