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AQA GCSE - Unit 3 (P3,B3,C3) New specification papers.

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Reply 1120

NightStrider

Anyone up for revision game?

Reply 1121

beaux1

Original post by NightStrider

I feel for you! I haven't finished unit 3 physics or bio in class but I ended up self teaching it.

The mygcsescience videos are really useful and I made the rest of my notes from the following revision guide :
http://www.amazon.co.uk/dp/1408508346/?tag=hydra0b-21&hvadid=9550948389&ref=asc_df_1408508346

That revision guide is useful, and it may be at your local library - it was at mine.

thank you!!

Reply 1122

NightStrider

Original post by beaux1

thank you!!

No problem.

Reply 1123

HeyThereHarry

Has anyone purchased mygcsescience's practice exam papers? Are they good and useful? I'm tempted to buy them, but I don't want to waste my money.

Reply 1124

Captain Anonymous

I'm thinking of purchasing them as well - no one will have them yet as deliveries start on the 22nd earliest - they should be good but, again i'm unsure, I think i'm going to get them ...

Reply 1125

NightStrider

Original post by Captain Anonymous

I'm thinking of purchasing them as well - no one will have them yet as deliveries start on the 22nd earliest - they should be good but, again i'm unsure, I think i'm going to get them ...

I'm unsure too.

Reply 1126

Captain Anonymous

I'm buying them mate :smile:

Reply 1127

HeyThereHarry

I've decided that I'm going to buy them! Fingers crossed that they're worth it! :tongue:

yeah i hope so

going by the quality of his videos they should be :L

Reply 1130

NightStrider

anyone up for revision game?

Reply 1131

Captain Anonymous

let's gooooo........... :smile:

Reply 1132

Kill3er

Which of these is correct? If they're all correct, which is preferred?

Ethanol - C₂H₆O
Propanol - C₃H₈O
Butanol - C₄H₁₀O

Ethanol - C₂H₅OH
Propanol - C₃H₇OH
Butanol - C₄H₉OH

(edited 11 years ago)

Reply 1133

NightStrider

Original post by Kill3er

Which of these is correct? If they're all correct, which is preferred?

Ethanol - C₂H₆O
Propanol - C₃H₈O
Butanol - C₄H₁₀O

Ethanol - C₂H₅OH
Propanol - C₃H₇OH
Butanol - C₄H₉OH

All correct. What do you mean by preffered?

Reply 1134

Kill3er

Original post by NightStrider

All correct. What do you mean by preffered?

Thanks.
Which is the most popular method of writing those?
I'm thinking the second way.

Reply 1135

NightStrider

Original post by Kill3er

Thanks.
Which is the most popular method of writing those?
I'm thinking the second way.

But one is the chemical formula and one is the structural formula. How is there a correct answer.

Question: What is meant by double circulation and why does the body utilise it?

Reply 1136

Kill3er

Original post by NightStrider

But one is the chemical formula and one is the structural formula. How is there a correct answer.

I see, i guess it doesn't matter which one i use. Is it correct saying Butanol will release more energy on combustion compared to ethanol?

Reply 1137

NightStrider

Original post by Kill3er

I see, i guess it doesn't matter which one i use. Is it correct saying Butanol will release more energy on combustion compared to ethanol?

Yes

Reply 1138

Captain Anonymous

double circultaion is basically means the heart pumps blood in 2 diffferent ways and for 2 different areas. From the lungs to the heart and from the heart to the body