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Answers for “Venus in transit” with Explanations

Answers for “A Neuroscientist reveals how to think differently” with Explanations

Answers for “Hearing Impairment” with Explanations

Question 14-17:
14. F (para F, last 4 lines: “the Universe today. The parallax principle can be extended to
measure the distances to the stars. If we look at a star in January — when Earth is at one
point in its orbit — it will seem to be in a different position from where it appears six
months later. Knowing the width of Earth‟s orbit, the parallax shift lets astronomers
calculate the distance”)

15. D (para D, first 3 lines: “Inspired by Halley‟s suggestion of a way to pin down the scale
of the Solar System, teams of British and French astronomers set out on expeditions to
places as diverse as India and Siberia. But things weren‟t helped by Britain and France
being at war. The”)

16. G (para G, the whole para: “June 2004‟s transit of Venus was thus more of an
astronomical spectacle than a scientifically important event. But such transits have paved
the way for what might prove to be one of the most vital breakthroughs in the cosmos —
detecting Earth-sized planets orbiting other stars”)

17. E (para E, first 2 lines: “While the early transit timings were as precise as instruments
would allow, the measurements were dogged by the „black drop‟ effect. When Venus
begins to cross the”)

Question 18-21:
18. D (para F, first 4 lines: “But astronomers laboured hard to analyse the results of these
expeditions to observe Venus transits. Johann Franz Encke, Director of the Berlin
Observatory, finally determined a value for the AU based on all these parallax
measurements: 153,340,000 km. Reasonably accurate for the time, that is quite close to
today‟s value of”)

19. A (para B, line 6-8: “differ. By timing the transit from two widely-separated locations,
teams of astronomers could calculate the parallax angle — the apparent difference in
position of an astronomical body due to a difference in the observer‟s position.
Calculating this angle”)

20. B (para C, line 2-4: “measurements. Iohannes Kepler, in the early 17„h century, had
shown that the distances of the planets from the Sun governed their orbital speeds, which
were easily measurable. But no-one had found a way to calculate accurate distances to
the planets”)

21. C (para D, line 6-8: “Pondicherry in India. Fleeing on a French warship crossing the
Indian Ocean, Le Gentil saw a wonderful transit — but the ship‟s pitching and rolling
ruled out any attempt at making accurate observations. Undaunted, he remained south of
the equator, keeping”)

Question 22-26:-
22. FALSE (para C, last 5 lines: “larger, and Halley worked out that by would be possible to
measure the Sun’s distance to 1 part in 500. But there was a problem: transits of Venus,
unlike those of Mercury, are rare, occurring in pairs roughly eight years apart every
hundred or so years. Nevertheless, he accurately predicted that Venus would cross the
face of the Sun in both 1761 and 1769 – though he didn‟t survive to see either.”)

23. FALSE (para D, last 2 lines: “to observe the next transit in the Philippines. Ironically
after travelling nearly 50,000 kilometres, his view was clouded out at the last moment, a
very dispiriting experience”)

24. TRUE (para E, line 2-3: “measurements were dogged by the „black drop‟ effect. When
Venus begins to cross the Sun‟s disc, it looks smeared not circular — which makes it
difficult to establish timings.”)

25. NOT GIVEN

26. TRUE (para F, line 7-8: “the Universe today. The parallax principle can be extended to
measure the distances to the stars. If we look at a star in January — when Earth is at one
point in its orbit — it will”)

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