Chapter 1.2 - Micrometry and Magnification | Cambridge A-Level 9700 Biology

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Chapter 1.2 - Micrometry and Magnification | Cambridge A-Level 9700 Biology

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behlogy | Cambridge A Level 9700 Biology

2 жыл бұрын

Based on the NEW! 2022-2024 syllabus
Cambridge Assessment International Education
9700 AS Biology
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Пікірлер: 41

@munirsultan2887 Жыл бұрын

Mam I think that the "actual length" for the egg of Aedes mosquito was not 200nm, It was 700nm because we had to use the scale given to measure the actual length. The line representing 200 nm was 12mm by length and the image was 42 mm and by calculation we know that is 700nm so magnification was (42×10times6)÷700

@behlogy Жыл бұрын

Hi so the answer for magnification would differ based on your screen! On mine, the image length of the scale bar is 42mm, not 12mm, bcs I have a big screen! The question asked for magnification only, the actual length of the mosquito larvae is irrelevant.

@munirsultan2887 Жыл бұрын

Oh ok mam i realize that now

@x._.y6894 Жыл бұрын

Thankyou so so much. I really can't thankyou enough. No way i was going to understand this topic myself. You are god sent. I am a private candidate for As level and I don't receive any kind of tution. You just saved my Biology. Thanks again❤️ May God bless you.

@alishbaahmad2613 Жыл бұрын

I’m a private candidate too. If you could share some more resources or video links for bio chem or phys that would be helpful thanks.

@voyage-of-tranquility 4 ай бұрын

@@alishbaahmad2613 etphysics is the best for physics! That channel alone is enough for physics. For chemistry, I recomment allery chemstry's crash course playlist.

@saimajabeen1410 Жыл бұрын

I understood this topic very well after watching you video.You are an amazing teacher

@aaryapandey4789 Жыл бұрын

I am going to start As level soon thank you for your help I have done igcse and is quite easy for me to understand thank you for making these videos

@user-zm2os7fy5e Ай бұрын

the only good thing about corona is, many talented teachers came out into the virtual world. thank you so much teacher, its really helping me with my a levels

@fwk686 Жыл бұрын

Thankyou so so much. You literally teach better than my teacher. I love you 💓

@fathimaazzahraarubusman5034 11 күн бұрын

Thank you very muuuch

@MarinHan-du9jx 4 ай бұрын

Hi mam am really greatful , u are amazing coz u have made me understand these things

@idkstephanie1653 Жыл бұрын

Thank you ma I'm so grateful

@dilutesodiumhydroxide3570 3 ай бұрын

Maam when i write my answer in micrometer is it necessary to always give my answer in 2 decimal place ? In some questions that you attempted in this video you gave yoyr answer in 2 dp but in some parts you gave your answer in 0 dp

@behlogy 3 ай бұрын

Millimeter in whole number! The rest, no rules. Unless specified in question.

@fatma-yz7dv 7 ай бұрын

First thanks for your help , you make it easy 🙏 Second I wanted to ask about level A , is it a high school subject ? Because my foundation year in college depends on this level , I am quite curious to know more cause im not in western country Last thing is there level b or a higher level after completing this level ?

@behlogy 7 ай бұрын

It's a sixth form / year 12 / foundation / pre-university subject. So same as your level :) But in terms of difficulty, i think my first year in university was easier than A - Levels... 😅😂

@WafaMustafa-gb6rx 5 ай бұрын

Hi! Great video i learned a lot about bio practicals from your video despite never touching a microscope in my life 😛 I have a question, I am a private candidate so i have no lab experince so do they provide us with a mm ruler to measure the image on the paper ? Cause i have a cm ruler. Sorry i have no knowledge of practicals 😝

@behlogy 5 ай бұрын

Haha all cm rulers have mm markings.... But yes they do provide.

@WafaMustafa-gb6rx 5 ай бұрын

@behlogy thank you, you are so sweet ❤ Also thanks for not making me feel dumb 😂❤

@ahmadrashidstanikzai2020 11 ай бұрын

Tnx u mum❤

@nickymajoka1197 Жыл бұрын

Thank yu maaam`♡

@rifannizar8629 Жыл бұрын

do we have to know about the microscope in detail for cambridge As level

@behlogy Жыл бұрын

Yes! You need to know how to use one as well.

@RandomMeathead Жыл бұрын

You calculated the magnification in nm instead of micro meters so are we suppose to calculate the magnification based on the unit provided for the image size or actual size or is it suppose to be in micro meter only?

@behlogy Жыл бұрын

For magnification. As long as top and bottom (aka Image/Actual) units are the same before division, all good.

@RandomMeathead Жыл бұрын

@@behlogy So it doesn't matter until all the units of calculations are same thus the answer can be in any unit we calculate in that's convenient

@abdullahshakeel8887 Жыл бұрын

i didnt understood why at 15 : 37 we multiplied 10 with 10 to get 100

@behlogy Жыл бұрын

1 div (on the stage um) = 10um So 10 div = 10*10um

@accuratesoup3486 Жыл бұрын

Thanks for the video. Will the labelled microscope be tested in the exam (is it in the syllabus)?

@behlogy Жыл бұрын

Not really but they do assume you know what the terms are referring to already

@_K_F_D_ Жыл бұрын

This was very helpful but I’m quite confused on why she guessed 11 on the EPG please explain 10:55

@behlogy Жыл бұрын

It's btwn line 10 and 20, but a little more. In CIE, epg is in whole number so i wouldnt count it as 10.5, i will round it to 11EPG.

@_K_F_D_ 11 ай бұрын

I still don’t get it (CIE? )

@sarahsajid1807 9 ай бұрын

@@_K_F_D_cie is the name of the Cambridge examination :)

@lab.independenciaindepende6082 5 ай бұрын

LO QUE PASA ES QUE NO DICEN QUE OCULAR USA Y QUE OBJETIVO

@behlogy 5 ай бұрын

Hellooo, it's usually in the question or the diagram. and if it isnt there , means it doesnt matter.

@dominiquesnyman468 Жыл бұрын

Am I understanding something wrong or shouldn't you have converted the 200nm scale bar to micrometers as well? Because you converted the 42 mm to micrometer and divided it by the 200nm to get the magnification. Shouldn't the units all be the same?

@behlogy Жыл бұрын

Refer to the pinned comment and my replies to see if it makes sense!

@MarinHan-du9jx 4 ай бұрын

Hi mam am really greatful , u are amazing coz u have made me understand these things