Question

Q.4 Answer in brief. (Any two)
1) How were the sun and the planets in our solar system created?
2) Why the species of dinosaurs were suddenly became extinct?
3) What are the features of Homo habilis?​

Answer 1

Answer:

3)This species , one of the earliest members of the genus Homo, has a slightly larger braincase and smaller face and teeth than in Australopithecus or older hominin species. But it still retains some ape-like features, including long arms and a moderately- prognathic face.

1) Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.

Answer 2

Answer:

1&2

Explanation:

There are multiple theories to explain this . Some say the sun and planets in our solar system were created by hot hydrogen balls while others say that the asteroid belt might've also helped in this. The sun is a Hydrogen ball that fuses H and He to live. The Planets were too such but cooled down eventually to form the solar system.

There are multiple theories for this question too. You see , some say that a huge asteroid wiped out everything which is located approximately near Mexico somewhere. Others say that the Earth auto maintains it's population so the great dying is another one which says that a series of earthquakes and volcanos killed 'em all. The one of the most vague ones suggest that Alien Civilizations might've also done it. They exist according to the Drake's equation

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