General Physica...

Quartzite is metamorphosed from _________.

If a news is broadcast from London at 1:45 pm on Monday, at what time and on what day it will be heard at Dhaka ($${90}^{o}E$$)?

Which one of the following statements is not correct?

Consider the following statements about rocks.
(1) Shale becomes slate through metamorphosis.
(2) Shale is converted to slate when it is subjected to tremendous pressure and high temperature.
Which of the statements given above is/are correct?

Consider the following statements:
(1) Total land area of Earth is approximately 1475 lakh square kilometres.
(2) Ratio of land area to water area of Earth is approximately 1:4.
(3) Maximum percentage of Earth's water is in the Pacific Ocean.
Which of the statements given above is/are correct?

Which of the following statements are true?
1. The direction of Canary current is North to South. 
2. The direction of Benguela current is South to North.
3. The direction of North Atlantic drift is West to East.
4. The direction of Californian current is North to South.
Choose the right answer from the options given below.

Water with more salinity freezes at __________.

Consider the following statements:
(1) Coal is a sedimentary rock.
(2) Basalt is an igneous rock.
Which of the statements given above is/are correct?

Sedimentary rocks are formed from sediment accumulated over long periods, usually under water. Choose correct statement(s) regarding it.
(1) Sedimentary rocks are classified under three main categories.
(2) Origin and composition form the basis of classification.
(3) It has the highest chance of retaining fossils.
Select the correct answer using the codes given below.

Continental crust is __________.