Yes they are. Thank you for sharing this
Uploading it here for anyone who might need this.
HISTORY_KEY_WORDS.pdf.The number of words are huge though. Memorizing all of them won't leave time for other crucial things.
Doubt about the density of continental and oceanic crust-
page no 25, ncert, physical geography says that continental crust is made up of heavier rocks having a density of 3 g/cm3.
The mean density of oceanic crust is 2.7 g/cm3.
G.C.Leong on the other hand says quite the opposite. That is, continental is 2.7 and oceanic is 3.
What should be our response if a question asks us about which one is denser?
NCERT is actually wrong on that one. I also remember coming across this while studying. It's probably a printing mistake or something
Oceanic Crust is thicker and it's density is 3 whereas continental crust has density 2.7g/cm3
One of the sources -> https://rwu.pressbooks.pub/webboceanography/chapter/3-2-structure-of-earth/
Yar yeh bta do koi please
Option C looks right. It forms a pattern. Option d doesn't.
The trick mentioned above fails because here a and e are not equivalent. On completing the sequence there are 3 a's and 2 e's. The sequence is cyclical so the number of letters will match only if we take it to zazaz. Then there will be 5 letters each.
The process in such questions is to
1) count the number of letters in the phrase. The factors of that number are the possible length of the repeating units. Here there are 20 letters. So possible units can be of length 2,4,5 or 10. 2 and 10 can be ignored. So it's either 4 or 5
2) substitute the options and see if there are repeating units of the needed length forming.
This should in most cases give the right answer.
This is more of a trick to remember which capital corresponds to which country, rather than remembering the names.
Remember Turkmenistan - Ashgabat ( Turk - Ash sounds similar to Turkish)
Then put the remaining countries and capitals in alphabetical order respectively. They'll correspond.
Kazakhstan - Astana
Kyrgyzstan - Bishkek
Tajikistan - Dushanbe
Uzbekistan - Tashkent
Edit: I saw @Archand's comment only after I posted. You'll need to substitute Nur Sultan for Astana afterwards. To help remember this, I'm imagining Rakesh Astana sitting on a throne like a Sultan :P
QUESTION 22.
The boundary between Indian and the Antarctic plate is marked by oceanic ridge. What type of plate boundary makes it possible?
a) Continent-Continent convergence
b) Continent-Oceanic convergence
c) Continent-Oceanic divergence
d) Oceanic-Oceanic divergence
Correct Answer:D
this could be an elementary question, but could someone explain why the answer should be D and not C instead?
since, the India-Australia plate is a continental plate and the Antarctic plate is an oceanic plate, should not the plate boundary be continent-ocean divergence instead?
Based on my understanding, divergent boundaries are almost always either oceanic-oceanic or continental-continental. In very simple, non-technical language, it is because divergence occurs when a single plate starts breaking up due to force from underneath. Once this process is complete over the course of 100s, maybe 1000s of years, you have two different plates on either side. But they are both the same kind of plate (either both oceanic or both continental) as the source is the same.
Further, mid-oceanic ridges are formed at the divergent boundaries between oceanic plates (that's why they're called mid-oceanic).
Also plates are usually mixed. For instance, the Indian plate is majorly continental but it has oceanic parts too. So it is possible that the oceanic ridge between the Indian and Antarctic plate lies in the part where both plates are oceanic.
