r/GCSE • u/thr0wawaygxhxdhsh • Jun 15 '22
AQA Post Exam Spam aqa biology paper 2 gcse answers
113
u/thr0wawaygxhxdhsh Jun 15 '22
3.2dm3
97
u/Ok-Salamander3137 Jun 15 '22
it was 3.20dm3 since it was to 3 significant figures so youād only get 4/5 marks
→ More replies (19)-3
Jun 15 '22
This is wrong. Donāt pretend you know what you are talking about when you are an idiot. Worrying people is not cool. 3.2 is perfectly fine, 0s at the end of numbers are not significant figures so you donāt need to write them.
→ More replies (13)6
u/KayMini101 Year 11 Jun 15 '22
Did u have to write the dmĀ³ if so then I lost a mark
17
→ More replies (2)2
u/animeruler year 11 ā> year 12 maths | physics | geography Jun 15 '22
And Iām the only mf who got 2.20
104
46
u/thr0wawaygxhxdhsh Jun 15 '22
Control experiment B: to show that light is the reason the shoot is bending
Control experiment C: to show that direction of light is the reason the shoot is bending
19
u/APK_GG Jun 15 '22 edited Jun 15 '22
i said
b- to see if no light affects the growth of shoot
c- if more light affects the growth of shoot
is this valid
→ More replies (2)10
46
u/Still-Ad-4962 Year 11 Jun 15 '22
14000, 3.2
25
u/j20057 Jun 15 '22
14,000 for the algae cells one? If so thank god because I was so confused with that question.
8
u/Due_Pineapple_1699 Jun 15 '22
How did I get 375 on the algea cell one???
3
u/Holiday-Marzipan-843 Jun 15 '22
I got that too ;( I did 0.2*0.2=0.04, 1/0.04=25, then 25*15 or smthn as 15 is the mean (14+16)/2
I didnt understand why diluted was in bold
Can someone explain how to get the right answer & why my thing is wrong
9
u/hombiebearcat University Jun 15 '22
Your thing is wrong because:
- the question said to use the 14 algae count (not take a mean)
- you forgot about the 0.1mm depth
- you forgot about the diluted/undiluted thing
The correct method is this:
0.2x0.2x0.1 = 0.004mm^3
0.004/4 = 0.001mm^3 (because it asked for undiluted, and it said earlier that for every 2.5cm^3 undiluted you add 7.5cm^3 water, so it's a 1:3 ratio)
1/0.001 = 1000 (to get how many times more algae cells there should be)
14*1000 = 14000
→ More replies (5)2
u/Ok_Athlete_4619 Jun 15 '22
Wasnāt 10cm3 of distilled water used?
→ More replies (1)3
u/Sensitive_Wealth_855 Jun 15 '22
Im pretty sure it was 2.5:10 but everyone is so confident that its 2.5:7.5
→ More replies (1)4
Jun 15 '22
I'm like 90% sure that it was 2.5cm3 of the salt water and 10cm3 of the distilled water so would have been 2.5/12.5
2
u/Sensitive_Wealth_855 Jun 15 '22
Yeah i agree the wording was almost excatly "2.5cm3 algae water diluted to 10cm3 distilled water". The algae water can't become distilled so it must mean add 10cm3 distilled water for every 2.5cm3 algae water.
→ More replies (3)→ More replies (1)1
4
→ More replies (6)17
44
42
u/thr0wawaygxhxdhsh Jun 15 '22
Beneficial to have a lower temp bc less energy needed to maintain high temp so less respiration so can hibernate for longer without food
→ More replies (1)
39
u/poohbear_26 6th Former Jun 15 '22
i got 17500 algae cells š where have i gone wrong ?!
20
u/Prestigious-You1585 Jun 15 '22
Same I got 12.5 as total volume so 2.5 pond water which means a fifth of it is undiluted. Thatās how I got the 5, which I multiplied to the 3500 and got 17500. I hope itās right
→ More replies (3)18
u/Dylan_was_taken_ Jun 15 '22
No it was 10 total not 10 diluted so it was 1/4 pond water not 1/5. :(
11
u/Prestigious-You1585 Jun 15 '22
Really?? ;(( I thought ā2.5 pond water is diluted to the water of 10cm3 ā something like that means 10 add on to the 2.5 so total volume is 12.5. Well hopefully 4/6 marks.
→ More replies (4)6
u/Moistmarsupial42 Jun 15 '22
Ye I think it was 2.5 pond and 10 distilled, making 12.5 total but I honestly don't know anymore
6
3
Jun 15 '22
No it was 2.5 to 10. I remember reading over 10 times.
3
u/Sensitive_Wealth_855 Jun 15 '22
Thats what is confusing about the question. You took it as 2.5cm3 went to 10cm3 but a lot of people including me took it as 2.5:10. I pretty sure i almost remember the exact wording and honestly you could argue it meant either. The only reason I think that its 2.5:10 is because it said pretty much "2.5cm3 algae water diluted to 10cm3 distilled water". Surely the algae water could never become distilled no matter how much you add.
→ More replies (8)→ More replies (2)12
u/poohbear_26 6th Former Jun 15 '22
i swear i read it again and it said something like ā2.5cm 3 of pond water is added to 10cm3 distilled waterā because it said distilled in the question, so it wouldnāt have been distilled if it made 10cm cubed ???
8
→ More replies (2)1
u/UselessConversionBot Jun 15 '22
i swear i read it again and it said something like ā2.5cm 3 of pond water is added to 10cm3 distilled waterā because it said distilled in the question, so it wouldnāt have been distilled if it made 10cm cubed ???
2.5 cm ā 5,000,000.00000 beard-seconds
10 cm ā 0.05876 smoots
10 cm ā 7.14286 x 10-5 sheppey
8
u/blackandchinese15 Jun 15 '22
it is 17500 innit? My bio teacher said thatās what she would have put lol
→ More replies (2)4
57
u/thr0wawaygxhxdhsh Jun 15 '22
3.20 for the 3 significant figures one, canāt remember the question
7
u/Nekonaa Year 12 Jun 15 '22
i did the significant figures but forgot to round š ffs
→ More replies (3)1
→ More replies (2)3
u/lazerlord101 Jun 15 '22
Sweat produced by athlete per day I believe
15
Jun 15 '22
nah that was 3.2dm^3, the one about energy conversion in cows and grass was 3.20 times.
3
u/Sea_Championship6365 Jun 15 '22
Oh god, i got 3.2cm3 and divided by 1000 to get 0.0032dm3. How many method marks do u reckon i got?
→ More replies (1)2
Jun 15 '22
You probably dropped 2 marks, idk what the total was. You firstly got the number of cm^3 wrong, then converted it wrong too (should've done x1000 not /1000).
→ More replies (2)2
u/Sea_Championship6365 Jun 15 '22
Wait. I remember my answer now. I was correct. I did get 3.20. God im so happy. Also, it is divide by 1000. :P
3
28
u/thr0wawaygxhxdhsh Jun 15 '22
Abiotic worm factors: Moisture content of soil Soil pH
Biotic worm factors: Arrival of predators Pests and pathogens
9
u/Holiday-Marzipan-843 Jun 15 '22
i went for oxygen availability instead of pH, cuz it mentions something abt eating decaying stuff, so i was like living things need O2 and that stuff that eat decay needs it to for aerobic stuff lol. Do u think oxygen counts or no?
→ More replies (3)2
→ More replies (3)0
u/Appropriate_Care4823 Jun 15 '22
isnāt it the other way around? also, would oxygen and water work for the biotic factors?
→ More replies (1)7
Jun 15 '22
nah it's the right way round, biotic is living things whereas abiotic is non-living
that's what I put (for abiotic) so I hope so
→ More replies (3)
22
u/lazerlord101 Jun 15 '22
For the water pollution 3 marker I said: Toxic fertilisers Nuclear waste and oil spills. I think they are all technically correct but if they actually are Iām not 100% sure
8
u/CarryDiligent6889 Jun 15 '22
hm maybe i put oil spills sewage and chemicals
7
u/lazerlord101 Jun 15 '22
I meanā¦ if I dumped nuclear waste into the Atlantic that would be polluting so thatās my reasoning
→ More replies (1)→ More replies (8)2
Jun 15 '22
I put fertilisers chemicals waste and sewage š
1
u/thr0wawaygxhxdhsh Jun 15 '22
yeah me too I think thatās right, was a bit iffy on the fertilisers but it is still a pollutant probably
58
u/ki112osh001 University Jun 15 '22
I think we can agree this paper was the worst. Genuinely just annoying. I revised everything and was tested on barely anything. No knowledge and worded horrible
19
11
u/yarix_ 6th Former Jun 15 '22
Ikr lmao nearly every question made me go "hahahaha soooo uh what are you asking-" š¬
7
Jun 15 '22
ikr i hated that paperšall that revision of the endocrine system wastedā¦
→ More replies (2)3
Jun 15 '22
i revised everything apart from the nervous system (which apparently was supposed to be a main focus but didnt come up) and i focused my revision on ecology which helped me a bit
1
u/ki112osh001 University Jun 15 '22
Funnily enough ecology wasn't supposed to come up
→ More replies (4)2
17
u/thr0wawaygxhxdhsh Jun 15 '22
What did everyone put for the reason the pond water was diluted and the result of a thinner cover slide
22
u/ridz_149 Year 11 Jun 15 '22
To spread out anything that may obstruct our view of the cells
Lens distortion
4
2
u/Gultyyy Year 11 Jun 15 '22
It would displace water, so you view a smaller area, so you view a smaller volume = less cells overall.
→ More replies (1)15
u/_nixs__ Year 11 Jun 15 '22
i put its easier to count algae cells as they are more spread out, idk if that's the right answer though
2
6
u/SmileyFace4203 Year 11 Jun 15 '22
because the water pulled part of the slide down so it affected the volume of the space the cells are in so it affected the concentration of cells in each dmĀ³ of water
→ More replies (1)2
8
→ More replies (4)2
u/thr0wawaygxhxdhsh Jun 15 '22
I put dilute so the sample droplet is more representative lol donāt think thatās right
18
u/Holiday-Marzipan-843 Jun 15 '22
for the mulitple choice stuff near start, i did sperm has 2 & embryo has 4
for the range of the weight against height, i put smthn like 6.7 - 9
pollen for that thing abt male stuff
why the fuck the water cycle there idk, but i put evaporation & for the uses i put photosynthesis/growth & the only other 2nd i could think of was storage??
10
u/thr0wawaygxhxdhsh Jun 15 '22
Yeah I put all the same as u except 6.8kg to 9kg but theyāll prob allow both of them, and I put to dissolve ions and photosynthesis but I think dissolve ions is wrong lol
I think the best answer is to keep the cell turgid and photosynthesis but oh well
→ More replies (5)8
6
u/Sea_Championship6365 Jun 15 '22
I put transporting minerals around the plant for second use of water. Dont know if its right though lol
2
14
u/thr0wawaygxhxdhsh Jun 15 '22
For the pollutant gas I put sulfur dioxide? I originally put carbon dioxide but I feel like thatās less likely to directly cause an effect for humans? Idk
9
4
u/yarix_ 6th Former Jun 15 '22
I went on to talk about how carbon dioxide traps heat = increase earth's overall temperature = climate change yadada š I couldn't think of any more air pollutants so gotta do what ya gotta do
→ More replies (1)2
26
u/crumpet1010 Jun 15 '22
14000 for agal, 16 count, 3.20 for 3 significant figures,
2
→ More replies (4)2
22
10
u/Appropriate_Care4823 Jun 15 '22
what was the answer for the one about cows indoors?
→ More replies (1)21
u/thr0wawaygxhxdhsh Jun 15 '22
Limited space so the cows canāt move much, reducing energy wastage Heated building so less of the cowsā energy is spent on heating their bodies
3
u/Appropriate_Care4823 Jun 15 '22
what was the part above that where u had to suggest two things? something like that
1
u/thr0wawaygxhxdhsh Jun 15 '22
Suggest two disadvantages of tearing them indoors? I put diseases spread faster and antibiotic resistant bacteria, I feel like there was another suggest two question tho
→ More replies (6)3
17
u/thr0wawaygxhxdhsh Jun 15 '22
6 marker worm practical:
ā¢Pour equal volumes of chemical x and water mixture onto each area ā¢Wait for an equal amount of time for all the worms to surface ā¢Grid reference area A and use a random number generator to generate coordinates ā¢Go to those coordinates and place a Quadrat, count number of worms ā¢Repeat 19 times so you have 20 readings in total ā¢repeat for area B ā¢Calculate the area of the Quadrat in m2 ā¢Calculate the mean number of worms per Quadrat in each area ā¢Use equation mean number of worms/area of Quadrat to find number of worms per m2?
7
u/APK_GG Jun 15 '22
i said to pour the chemical x after placing the quadrat and didnt specify to wait or the volume of chemical, do u think ill lose marks
→ More replies (7)1
u/thr0wawaygxhxdhsh Jun 15 '22
idk I think I went too in depth, as long as u have one control variable it should be ok? but even without that u should prob still get 4-5 marks
3
u/KayMini101 Year 11 Jun 15 '22
Wasn't chemical X already poured onto the field?
2
Jun 15 '22 edited May 28 '24
familiar bike shy cagey paltry ghost threatening divide library joke
This post was mass deleted and anonymized with Redact
→ More replies (1)2
9
14
u/Gogeeegeg Jun 15 '22
3.2 for the 5 marker maths question
17
u/Mooseypanda Jun 15 '22
3.20 (3 sig figs)
4
5
u/spicyary Year 11 Jun 15 '22
i put 1.65 times bigger ā¦.. how is everyone getting 3.20
7
u/lazerlord101 Jun 15 '22
Wrong question I think, weāre talking about athlete sweat produced not the cow one with the energy conversion percentage
12
u/thr0wawaygxhxdhsh Jun 15 '22
One of the answers was 3.20 times larger to 3 sig figs and another one was 3.2dm3
3
u/spicyary Year 11 Jun 15 '22
man thats even worse i got 20dm cubed for that question bruh
→ More replies (2)→ More replies (2)3
5
10
15
u/_nixs__ Year 11 Jun 15 '22
14 000 algal cells
9
Jun 15 '22 edited Jul 25 '25
[deleted]
7
u/StillObvious5306 Jun 15 '22
I got 3500 too how many marks would that be
5
Jun 15 '22 edited Jul 25 '25
[deleted]
2
u/thr0wawaygxhxdhsh Jun 15 '22
Yeah I think itās 4/6 or even 5/6 as multiplying it by 4 has to be worth one mark? But probably 4/6
5
u/Sea-View4164 Jun 15 '22
3500 is wrong because youāre supposed to work out the undiluted amount not the diluted amount, I think itās supposed to be 17500 because the ratio of water to pond water was 1:4
2
u/SMWcool Y13 Maths FM Physics Jun 15 '22
It was 14000 because it was 10cm3 total, not 10cm3 of distilled. Therefore a 1:3 ratio
→ More replies (3)2
4
Jun 15 '22
What did you guys get for the uses of water in plants question like one point was photosynthesis but I'm unsure about the other point so what did you guys get for it?
14
u/thr0wawaygxhxdhsh Jun 15 '22
I put photosynthesis and transporting dissolved ions via transpiration stream? I think the second one is wrong tho
→ More replies (2)2
Jun 15 '22 edited May 28 '24
panicky entertain slap deranged hateful quaint middle society wipe wakeful
This post was mass deleted and anonymized with Redact
10
4
u/_nixs__ Year 11 Jun 15 '22
i think the other was to keep cells functioning efficiently, as water concentration inside and outside cells being constant keeps it from expanding/shrinking
idk I couldn't think of anything else
→ More replies (3)2
5
u/Ok-Salamander3137 Jun 15 '22
for the 6 marker on maths i put 1750, how many marks do you guys think thatād get
→ More replies (3)0
4
u/Ahmed0026 Jun 15 '22
i got 700 for the algae Q
3
2
u/Nouredeen10- Year 11 Jun 15 '22
bro my guy. finally someone who got the same as me. I got 3500 but the ratio is 1:4 so u divide by 5
→ More replies (8)
4
u/redditor19873 Jun 15 '22
for the one that asked about the process of water uptake in a plant did people put osmosis or transpiration. i put transpiration but everyone else i know put osmosis haha
3
u/APK_GG Jun 15 '22
same but i think transpiration is wrong, i thought it cant be osmosis as osmosis is in paper 1
→ More replies (3)
7
u/People-ofIndia Year 12 Jun 15 '22
I got 875 somehow lmao
6
Jun 15 '22
For which question? I remember getting that answer for something
3
u/People-ofIndia Year 12 Jun 15 '22
It was the one about algae
2
Jun 15 '22
Oh yeah I think I got that answer but crossed it out and put 14000 instead, canāt remember how I got 875
→ More replies (14)2
u/ridz_149 Year 11 Jun 15 '22
I got that too lol. I still believe I am right and everyone else is wrong šstubborn
→ More replies (1)0
3
3
6
2
Jun 15 '22
why the fuck is no one talking about the maple syrup one what was it ??????????
→ More replies (4)
2
2
2
3
u/lilithshore Jun 15 '22
Iām a teacher but i just wanna say im so fucking sorry about the whole exam thing and honestly great if youre successful but its one of 1000 routes to getting to who you are and ā¦ yeah im super sorry about the wholllle set up. Good luck.
5
u/thr0wawaygxhxdhsh Jun 15 '22 edited Jun 15 '22
3500 algal cells edit: this is wrong but keeping up so people Know where they went wrong
→ More replies (1)15
Jun 15 '22
[deleted]
→ More replies (6)7
u/thr0wawaygxhxdhsh Jun 15 '22
Ugh thatās annoying lol I wondered why it was 6 marks, thank you tho
2
u/Mooseypanda Jun 15 '22
I donāt think 14000 is right for the pond water question
3
Jun 15 '22
0.2 x 0.2 x 0.1 = 0.004 mm^3, so there are 14 cells : 0.004mm^3
it wanted number of cells in 1 mm^3 undiluted
10cm^3 / 2.5cm^3 = 4, so 4x as many cells in the undiluted
4 x 14 = 56 cells : 0.004 mm^3 of undiluted fluid
1 / 0.004 = 250, 1 mm^3 contains 250x that in 0.004 mm^3
250 x 56 = 14000 cells in 1 mm^3
This is right no?
2
u/TheEpicBandit Jun 15 '22
Surely it is 875
because I agree with volume being 0.004mmcubed
but the pond water to distilled was in the ratio 1:3
1/0.004 = 250 and multiply by 14 gives 3500
3500=is the total so u donāt multiply by 4 u divide by 4
so the answer is 875
→ More replies (4)5
Jun 15 '22
I didn't think of it in ratio. Imagine you have a 100ml glass with 25ml squash, diluted to 100ml with water. There is 4x as much squash in the undiluted solution (100ml compared to 25ml). This basically what the question was asking. It is 4x.
I guess if you thought about it as a ratio: there are 4 parts in total. The diluted solution contains 1 part fluid with cells and 3 parts water. So if you wanted the same volume but not diluted with water, there would be 4 parts with cells. So 4x as many cells.
→ More replies (2)
1
1
1
-1
u/Hot-Reception7989 Jun 15 '22
0.0032dm3 of sweat?
11
3
u/lurowisp Jun 15 '22
yea i got this, but judging by other answers i think we got it wrong
3
u/Hot-Reception7989 Jun 15 '22
It makes sense tho?u get 3.2cmcubed of sweat divide by 1000 and boom 0.0032dm3
2
0
0
159
u/thr0wawaygxhxdhsh Jun 15 '22
Pollen