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# AQA A2 Environmental Studies/Science Watch

1. What did people get for the critical value or whatever it was where you had to tick a box? and what did people put for the 2 questions on vegetarian vs meat?
2. (Original post by AmyT997)
It was percentage they were due to chance not percentage they were significantly different so it should be a low value i think
You can say either. There is a less than 99.75% probability that the observed results were caused by chance OR There is a more than 99.75% probability that the observed results were not caused by chance OR There is a less than 0.25% chance that the observed results were caused by chance etc
3. (Original post by AmyT997)
What did people get for the critical value or whatever it was where you had to tick a box? and what did people put for the 2 questions on vegetarian vs meat?
11.36 or something like that.

For energy subsidies i had no clue and said meat takes much more energy to produce the same amount of biomass orr something and for the second one I put about meat being at a higher trophic level whereas plant foods get their energy directly from the sun
4. (Original post by DecantedOrange)
You can say either. There is a less than 99.75% probability that the observed results were caused by chance OR There is a more than 99.75% probability that the observed results were not caused by chance OR There is a less than 0.25% chance that the observed results were caused by chance etc
ahhhh! I just realised I accidently put 2.5 not 0.25! *facepalm*
5. (Original post by AmyT997)
What did people get for the critical value or whatever it was where you had to tick a box? and what did people put for the 2 questions on vegetarian vs meat?
I think I put 0.005
6. and for veg vs meat I talked about shorter/longer food chain and you have to grow crops to feed to livestock
7. (Original post by greencat55)
ahhhh! I just realised I accidently put 2.5 not 0.25! *facepalm*
It was 2.5 (0.025*100=2.5)
8. I got so stumped on what i think was a really basic question, what data did they need to know to draw an accurate line of best fit?
9. (Original post by AmyT997)
I got so stumped on what i think was a really basic question, what data did they need to know to draw an accurate line of best fit?
I wasn't sure but I said they need to know the range of data

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10. (Original post by DecantedOrange)
I got 9 and 7.something too

0.025 is 99.75% i think.
number of species was 21.. so basically work it out backwards and you get 21
11. (Original post by DecantedOrange)
11.36 or something like that.

For energy subsidies i had no clue and said meat takes much more energy to produce the same amount of biomass orr something and for the second one I put about meat being at a higher trophic level whereas plant foods get their energy directly from the sun
Yeah meat = hetrotrophic so less efficiemt

plants = autotrophic so more efficient
12. (Original post by greencat55)
I got 21 in the table and 7.34 for chi squared and put 2.5% for the next one. im pretty sure the table one is 21 because it was (O-E)^2/E so O = /2.4x15 +15

I got that too. We checked with my teacher and he says it's definitely correct

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13. Thought the paper was beautiful overall... didn't really like the forestry ones at the beginning, but still think I got enough to get into uni 😄

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14. (Original post by croatoan)
I got that too. We checked with my teacher and he says it's definitely correct

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9 worked too though?
15. (Original post by AmyT997)
9 worked too though?
How can two numbers work??? I cannot see how 9 could be the answer, could you explain how you got 9?

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16. Ahhh that was so much better than envs3 :') I did the abiotics question, there were some points I forgot but I think I went into enough scientific detail so glad i revised the soil erosion experiment last night! Hope I've scraped a B

I didn't understand the mean question and the first stats calculation though, like most people by the sounds of it haha

By the way for the essay i ticked one question, then changed my mind and crossed it out - will this be ok? xD
17. (Original post by greencat55)
How can two numbers work??? I cannot see how 9 could be the answer, could you explain how you got 9?

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dammit. i realise what ive done i multiplied 2.4 by 15 then square rooted it which gave me 6 but then i did 15-6 to get 9 when i think i should have done 15+6
18. Anybody do the transport essay? What did/would you have wrote for it, something to do with affluent countries aiming for transport sustainability/no environmental damage
19. That paper was a beauty! Did the abiotic one and wrote to the last line!
20. Did any one else do the last essay, about genetic manipulation advantages and disadvantages? What did you put?
I talked about selective breeding, inter breeding, intra breeding, cloning and genetic engineering. Anything I missed?

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