Stars and the solar system Worksheet-9

Stars and the solar system Worksheet-9

21. Name two planets having no satellites.

22. What are meteor showers?

23. What is meant by remote sensing?

24. Name any three celestial bodies.

25. What is the difference between a star and a constellation?

26. Name the star, which appears stationary from the Earth.

27. Why do we classify the Sun as a star?

28. What is a natural satellite?

29. Which planet of the solar system is (a) largest and (6) smallest in size?

30. Name the planets that were known to ancient astronomers.

31. Name different types of celestial bodies that are members of solar system.

32. The artificial satellites are used for­­­­­­­­­­­ ____, ______, ______ and ______.

33. What is universe?

34. Name the natural satellite of Earth.

35. What is a comet?

36. Which planet is nearest to the Earth?

37. Name two planets which are near to the Sun.

38. Which planet moves in a different plane?

39. Which planet of the solar system is the hottest?

40. Name the planet which is farthest from the Sun.

Answer:

21. Mercury and Venus.

22. When the earth crosses the tail of the comet, swarms of meteor are seen, known as meteor showers.

23. Collecting information from a distance by satellites is known as remote sensing.

24. The stars, Sun and Moon are celestial bodies.

25. A star is a celestial body that continuously emits light and heat, whereas a constellation is group of stars which resemble some prominent figure or a shape of animal.

26. Pole star

27. The Sun is a star because it continuously emits light and heat. It appears large as compared to other stars because it is nearer to the Earth.

28. A natural satellite is a body that revolves around a planet.

29. (a) Largest is Jupiter (b) Smallest is Pluto

30. The planets known to ancient astronomers were Mercury, Venus, Earth, Mars, Jupiter and Saturn.

31. The different types of celestial bodies are planets, asteroids, satellites, comets, meteors and meteorites.

32. Long distance communication, research, remote sensing, defense.

33. The vast unimaginable space which encompasses most distant stars, planets and anything else, which can be imagined is called universe.

34. Moon

35. A comet is a heavenly body which revolves around the Sun in-an elliptical path.

36. Venus.

37. Mercury and Venus.

38. Pluto.

39. Venus.

40. Pluto.