35. Describe the nebular theory for the formation of the Solar System 38. Which

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35. Describe the nebular theory for the formation of the Solar System 38. Which of the following is nos a required property of a mineral? to the Sun. This near-miss would have drawn large amounts of matter other star by their mutual tidal forces, which could have then condensed into pla b) A star had passed close to the Sun early in its life to cause tidal bulges and that t with the internal process that leads to solar p filaments of matter similar in form to spiral galaxies. The filaments cooled into due to the approach of some other sta out of the Sun and the d) silica tetrahedron s, resulted in the ejection of c) The Sun collided with a passing star. Terrestrial planets were too their own; one very large proto-planet broke in two Jupiter and Saturn, with a connecting f d) The Sun, in its present form, passed through a dense interstellar cloud, emerging enveloped in a cloud of dust and gas, from which the planets eventually e) Stars form in massive and dense clouds of molecular hydrogen. These clouds are 39. What are the two major lines of evidence that support the Big Bang Theory? a) Observations show that spiral galaxies are the missing millions of years of predicted collisions and clusters of galaxies exist at great distances where they should exist. b) Amassing evidence suggests the universe may have no center and Sun has nearly 100% of the spin that c) A supermassive black hole, an iron-poor star, and a dusty galaxy-and MAJOR scientific of rotational instability, forming h the other planets formed formation would impart. and 1,000 orm matter from energy, as expected from the laws of physics, and equal then rotate, collapse, and form stars. Star produces a gaseous protoplanetary disk around the young star resulting in planets parts of matter and antimatter form, which is exactly what should have happened if an 36. About how old is Earth. How do we know? radiation The a) 4.5 billion years. This is the amount of time it would have taken the oceans to accumulate their present-dayc redshift of distant galaxies means that the Universe is theory predicts a glow visible as microwaves which has been accurately measured by orbiting of salts. 40. Light takes a long time to travel across the Universe, when we look at very distant This is the amount of time that physicists have determined it would have we are also looking back in time. From this we can see that galaxies a long time ago taken Earth to cool to its present t were quite different from those today, showing that the Universe has changed. This provides evidence ainst what theory? years. This is the amount of time it has taken the radiometric elements in to their present day e) 4.5 billion years. This is amount of time it would have taken our DNA to evove to its present level of complexity b) Steady -State Theory d) Clashing Branes Theory ) String Theory 37. How old is the universe? How do we know the age of the universe? a) 13.8 billion years, by measuring the Hubble constant. The Hubble constant is a a) They have atomic numbers 1,2, 3; atomic masses 1, 3, S names hydrogen, desterium, extrapolate back to the Big Bang, b) 13.8 billion years. This is the amount of time it has taken the radiometric elements in meteorites to have decayed to their present-day a) They have atomic numbers 1,1, 1; atomic masses 1, 3, 5; hydrogen, helium, tritium a) They have atomic numbers 1,1,L atomic masses 1,23; hydrogen, deuterum, tritium al They have atomk numbers 1, 2, 3; atornic masses 1,1, 1: al They have atomic numbers 1,1, 1; atomic masses 1, 3, 5; names hydrogen, helium, argon of s 42. On a rafting trip on the Salmon River, Ken picks up a perfect garnet crystal from the sand at Ruby Raplds. What crystal shape does it have? particles occurring in that have been a state before the hot Big Bang that our hot, dense, el Unknown. The Big Bang: just a theory. Gravity: only a theory. Even the entire field of c) octagon di hexagonal prism these ideas together is caled theoretical physies. 's not like these are facts, truths or

Explanation / Answer

ANSWER-

(35) NEBULAR THEORY -(b)This theory suggest that the sun and the planets,inculdind the earth have formed from a disc -shaped nebula. A vast cloud of hot gas is called ''nebula'' .The nebula theory summarised as follwows-

(36)C-- 4.5 GIGA YEARS. This is the amount of time that physicist have determined it would have taken earth to cool the present temperature.

(37)A- Universe is 13.8 billion years old, by measuring the Hubble constant.The Hubble constant is a measure of the current expansion rate of the universe.Cosmologist use this measurement to extrapolate back to the Big Bang.

(38)D- Except from silica tetrhedron, all property lke mineral is-- natually occuring ,inorganically formed ,homogeneous solid ,definite crystal structure and fixed or specific chemical compostion.

(39)d& e

(d)-A supercollides form matter from energy, as expected from the law of physics, and equal parts of matter and antimatter forms, which is exactly what should have happened if an energetic big bang created all the matter of the universe.

(e)- Observation of the red-shift of galaxies and of the cosmic radiation background.The red shift of distant galaxies means that that the Universe is probably expanding.The Big Bang theory predict a glow visible as microwaves which has been accurately measured by orbiting detector.

(40)B--STEADY-STATE THEORY- is a view that the universe is always expanding but it maintain a constant average density .

The matter being continously craeted to form a new star and galexy also form the same rate.

The oldest one became unobservable as consequence of their increasing distance and velocity of receession

(41) The hydrogen isotpes--(C)-

They have atomic number1,1,1, atomic masses 1,2,3, hydrogen,deuterium,tritium.

(42)Its dodecahedran garnet shape, here around faces is 12, vertices is 20 and number of edge is 30 present.

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