MOST IMPORTANT FACTS ABOUT EARTH AND GK FACTS (OCEANS AND CONTINENTS)

FACTS ABOUT EARTH

1. Third nearest planet to the sun.

2. The shape of the earth is “Geoid”.

3. The earth appears blue because its two-third surface is covered with water.

4. Earth rotates about its the axis which changes day and night.

5. Earth completes one revolution around the sun in 365 days. Change of seasons is the effect of the earth revolution.

6. The atmosphere of the earth which is a blanket of air surrounding the earth has many gases like

a) 78% nitrogen

b) 21% oxygen

c) And other gases

7. Earth surface is covered with 70% water and 30% land approximately.

8. Earth has one natural satellite called moon.

9. Earth is the only planet that supports life.

10. There are three main components of earth’s environment.

a. Lithosphere (solid part like land)

b. Atmosphere (gaseous banket of earth called air)

c. Hydrosphere (Water on the earth)

11.Biosphere: The part of earth where we find land, water and air together.

12. 97% of the earth atmosphere is found in oceans which is too salty for human use. The five major oceans are:

a. Pacific

b. Antarctic

c. Indian

d. Southern

e. Arctic

13. Deepest part of earth “MARIANA TRENCH” lies in Pacific Ocean.

14. The ocean named after a country is Indian ocean.

LITHOSPHERE

1. It is the solid portion of earth.

2. Rocks of earth and thin soil layer of earth are its parts.

3. The complete landmass of earth is divided in continents.

a. ASIA

· largest continent.

· Continent lies in eastern hemisphere

· India lies in south Asia

b. AFRICA

· Second largest continent

· Large part lies in northern hemisphere and rest in southern hemisphere

· World’s largest desert “Sahara Desert” is in north Africa

· World’s longest river “Nile” flows in Africa.

· It is bounded on all sides by seas and oceans

c. NORTH AMARICA

· Third largest continent.

· It is linked to South America by a very narrow strip of land called the Isthmus of Panama.

· The continent lies completely in the Northern and Western Hemisphere.

a. SOUTH AMERICA

· It lies in southern hemisphere to the south of north America.

· World’s longest mountain range “Andes” lies in this continent.

· World’s largest river “Nile” flows in this continent

b. ANTARCTICA

· It is located in the southern polar region of the earth.

· It is permanently covered with thick ice sheets.

· There is no permeant human settlement.

c. EUROPE

· It is to the west of asia.

· Ural mountain range separates aisa and europe.

· It is surrounded with water bodies on three sides.

d. AUSTRALIA

· It lies in southern hemisphere.

· Surrounded by oceans on all sides.

· Smallest continent

Also called island continent.

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HISTORY (MUGHAL EMPIRE)

BABUR Descendent of Timur (from his father side) and Genghis khan (from his mother side) It is said that he was invited in India by Daulat Khan Lodi and Alam kha lodi He laid the foundation of the Mughal empire by defeating Ibrahim Lodi in the first battle of Panipat on 21, April 1526. In 1527, he defeated Rana Sanga of Mewar at Khanwa. In 1528, he defeated Medini Rai of Chaneri at Chanderi. In 1529, he defeated Muhammad Lodhi (uncle of Ibrahim Lodhi) at Ghaghra. In 1530, he died at Agra. His tomb is at Lahore. The tomb of only two Mughal emperors are outside India i.e. Babur & Bahadur Shah Zafar He was the first to use gunpowder & artillery in India. Two gun masters Mustafa & Ustad Ali were in his army He wrote his autobiography Tuzuk-i-Baburi in Turki. Tuzuk-i-Baburi was translated in Persian (named Baburnama) by Abdur Rahim Khan-e-khana & in English by Madan Bebridge. He compiled two anthologies of poems, Diwan (in Tu

POLITY (ELECTIONS)

PHYSICS (SOUND)

Think like a proton and stay positive Sound waves are mechanical longitudinal waves and require a medium for their propagation. Sound cannot propagate through vacuum. When it propagates, speed and wavelength changes but the frequency remain constant. It is of three types Infrasonic waves – (0 to 20 Hz) Audible waves – (20 to 20,000 Hz) Ultrasonic waves – (>20,000 Hz) Properties of Sound Wave Reflection The bouncing back of sound when it strikes a hard surface, is called reflection of sound. The laws of reflection of light are also obeyed during reflection of sound. The working of megaphone, soundboards, and ear trumpets are based on the reflection of sound. The repetition of sound due to reflection of sound waves, is called an echo. The minimum distance from a sound-reflecting surface to hear an echo is nearly 17 m. The persistence of hearing on the human ear is 1/10th of a second. Soundproof rooms are made of

MATH TRIGONOMETRY

The only way to learn MATHEMATICS is to do MATHEMATICS Trigonometry , the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry. Their names and abbreviations sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc). The word trigonometry comes from the Greek words trigonon (“triangle”) and metron (“tomeasure”). The first use of the idea of ‘sine’ in the way we use it today was in the work Aryabhatiyam by Aryabhata, in A.D. 500. Aryabhata used the word ardha-jya for the half-chord, which was shortened to jya or jiva in due course. When the Aryabhatiyam was translated into Arabic, the word jiva was retained as it is. The word jiva was translated into sinus, which means curve, when the Arabic version was translated into Latin. Soon the word sinus , also used as sine , became comm

MATH MENSURATION 2-D

The only way to learn MATHEMATICS is to do MATHEMATICS IF YOU HAVE KNOWLEDGE LET OTHERS CANDLE LIGHT IN IT https://www.correcteducate.com/2019/08/chemistry-base-and-salts.html https :// www . correcteducate . com / 2019 / 07 / root - word . html https :// www . correcteducate . com / 2019 / 07 / properties - of - quadrilaterals . html https :// www . correcteducate . com / 2019 / 07 / geography - universe . html https://www.correcteducate.com/2019/07/general-knowledge.html https://www.correcteducate.com/2019/07/vocabulary-series_29.html

CORRECT WAY TO EDUCATION

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