iv) me and Venus do not have satellite.
(v) The farthest planet from the sun is
vi) Life was traced on the earth first about
million years ago.
vii) Greek philosopher first declared the round shape of the earth.
wiii) The actual shape of the earth is spheroid.
(ix) The temperature of Uranus and always goes below the freezing point.
(x) - first calculated the circumference of the earth.
Answers
iv) me and Venus do not have satellite.
ANS : Of the inner planets, Mercury and Venus have no natural satellites; Earth has one large natural satellite, known as the Moon; and Mars has two tiny natural satellites, Photos and Deimos. It has been suggested that some satellites may potentially harbour life.
(v) The farthest planet from the sun is
ANS: Neptune
The most distant planet in the Solar System is Neptune, which orbits the Sun at an average distance of 4.498 billion km (2.794 billion miles). Neptune was discovered by the German astronomer Johann Gottfried Galle on 23 September 1846.
vi) Life was traced on the earth first about million years ago.
ANS: The earliest time that life forms first appeared on Earth is at least 3.77 billion years ago, possibly as early as 4.28 billion years, or even 4.5 billion years — not long after the oceans formed 4.41 billion years ago, and after the formation of the Earth 4.54 billion years ago.
vii) Greek philosopher first declared the round shape of the earth.
ANS: Pythagoras
Early Greek philosophers alluded to a spherical Earth, though with some ambiguity. Pythagoras (6th century BC) was among those said to have originated the idea, but this might reflect the ancient Greek practice of ascribing every discovery to one or another of their ancient wise men.
viii) The actual shape of the earth is spheroid.
ANS: Planet Earth is not, in fact, perfectly round. This is not to say Earth is flat. Isaac Newton first proposed that Earth was not perfectly round. Instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.
(ix) The temperature of Uranus and always goes below the freezing point.
ANS :The dense troposphere, which contains the planet's clouds, is frigid at minus 243 degrees Fahrenheit (minus 153 degrees Celsius) to minus 370 F (minus 218 C), making it the coldest atmosphere in the solar system.
(x) - first calculated the circumference of the earth.
ANS :Eratosthenes
By around 500 B.C., most ancient Greeks believed that Earth was round, not flat. But they had no idea how big the planet is until about 240 B.C., when Eratosthenes devised a clever method of estimating its circumference