2. Which one of the following planets revolve around the sun from east to west ? Hors
(a) Mars
(b) Earth
(c) Venus
(d) Mer
3. It is also known as the Earth's twin (sister); HOTS
(a) Venus
(b) Neptune
(c) Uranus
(d) Satu
4. Which of the following is not a planet ?
(a) Mars
(b) Pluto
(C) Saturn
(d) Eart
5. Which of the following is a famous comet? HOTS
(a) Phobos
(6) Demos
(C) Moon
(d) Hal
6. A comet appears after,
(a) 76 years
(b) 10 years
(C) 104
years
(d) 77
SCIENCE-GEOGRAPHY: 6
208
Answers
Answer:
Earth
Venus
Pluto
Hal
76 years
ANSWER:—
2. (c) Venus ✅
(Venus and Uranus are the only two planets that rotate from east to west.)
3. (a) Venus ✅
(The Earth and Venus do often get called planetary twins, and this is largely because they are very close to being the same mass)
4. (b) Pluto ✅
(Pluto is not a Planet because : Pluto is a relatively round body, and also orbits the sun, but crossing Neptune's orbit! Not very planet friendly! Being so small, it cannot clear its path and hence has a very busy neighborhood, thereby violating the definition of a planet.)
5. (d) Halley's comet ✅
(1P/Halley is often called the most famous comet because it marked the first time astronomers understood comets could be repeat visitors to our night skies. Astronomers have now linked the comet's appearances to observations dating back more than 2,000 years.)
6. (a) 76 years (actually it's 75 years) ✅
(Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pasẞ once through the inner Solar System before being flung to interstellar space. The appearance of a comet is called an apparition)