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Geography Que-Ans: [3 Marks Each]

Earth's Origin and Evolution · Gujarat Board (GSEB) STD 11 Arts (GSEB - English Medium). 8 questions.

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Que-Ans: [3 Marks Each]

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8 questions · timed · auto-graded

Question 13 Marks
Write about the Sun.
Answer
The sun is a self-illuminated star. Its diameter is $13, 92,000 \ km.$
Which is $109$ times the diameter of the Earth. The sun's gravitational force is $28$ times greater than that of the earth.
The temperature on the outer surface of the sun is about $6000\ C$ while the temperature in the center part is about $1, 50,000,000^\circ C.$ supposed to be as much.
Enormous heat and energy are generated due to the nuclear reaction taking place in the center of the sun.
This hydrogen gas generates tremendous heat and energy to convert the particles into helium gas.
This heat energy and energy is called solar energy. The burning of $12000$ billion tons of coal per second from the sun emits the same amount of energy.
Only two billion of them reach the earth's surface. All living things on earth are surviving because of this energy. So he says whatever the foster father of the living.
The black spot that appears on the surface of the sun is called sunspot. Which are cracks on the surface of the sun. In which the internal heat of the sun comes out.
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Question 53 Marks
“Emergence of Life” - Write a short note.
Answer
  • The early atmosphere on Earth was hostile to the origin and development of living things.
  • So the origin of life became possible in the final stages of the origin of the earth.
  • Modern scientists consider the origin of life to be a chemical process.
  • The first complex biological molecule emerged.
  • Life originated from this mass of atoms.
  • During about $3.8$ billion years, the first microscopic life on Earth would have started in the oceans.
  • Early organisms were made up of unicellular cells and were known as amoebae.
  • These microscopic creatures were like boneless locha.
  • Over time, soft-bodied animals evolved into vertebrates, such as vertebrates and crabs without jaws.
  • The evolution of vegetation is also millions of years old.
  • The first oceans in the ocean are grasses and shrubs, followed by flowering plants, vines and trees.
  • This was followed by the development of vertebrates, docks and tails.
  • This was followed by the emergence of giant birds, such as giant dinosaurs, which changed their anatomy.
  • Animals came into existence as the terrestrial environment adapted.
  • These animals began to give birth to chicks instead of laying eggs.
  • They took care of the cubs after they were born. Monkeys originated about $40$ million years ago.
  • Over time, chimpanzees, gorillas, and balloons developed evolved brains.
  • Scholars have identified them as half-humans or capybaras, as the characteristics of vixit monkeys are similar to those of humans.
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Question 63 Marks
“Interstellar Hurricane Conception.” - Write a short note.
Answer
  • Russian thinker Otto Reichde introduced the “interstellar dust storm hypothesis” regarding the origin of the solar system.
  • According to him, the sun was in the universe. The planets that formed the planets about $600$ million years ago were in atomic form.
  • From time to time gases and dust storms are formed from these molecules.
  • Due to the gravitational force of the sun, the dust and gaseous clouds in the center of the stars are attracted to each other.
  • Dusty and aerial clouds began to orbit the sun in the form of a flattened tassel.
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Question 73 Marks
Give brief information about solar family members.
Answer
  • The solar family is a family of planets, satellites, asteroids, meteors and comets.
  • These include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune in addition to the Sun.
  • In addition, more than $173$ small satellites, more than $45000$ asteroids, comets and meteors are collectively called the solar family.
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Question 83 Marks
Write a short note of “a starry imagination”.
Answer
  • According to this hypothesis, the Earth is believed to have originated from a single star. He also calls it patriarchal conception.
  • There are mainly two sub-theories of this hypothesis.
$(1)$ Aerated zodiac conjecture: This conjecture was introduced by the German Emanuel Kant in $1755.$ In his opinion, there was a cold and motionless wind in space. Due to the mutual gravitational force of the gaseous particles of the gaseous cloud, it was transformed into a hot and rotating nebula on its imaginary axis.
$(2)$ The Nebula paradigm: In $1796,$ the French astronomer and mathematician Laplace suggested an improvement in Kant's aerodynamic hypothesis. According to him, the sun and the planets originated from the primordial matter of the aerobic and polar zodiac signs.
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Que-Ans: [3 Marks Each] - Geography STD 11 Arts Questions - Vidyadip