Fill in the following blanks with suitable words:
(a) The stars appear to...............in the sky.
(b) The Sun is a.............whereas Orion is a ...............
(c) The group of stars that appears to form a recognizable pattern in the sky is known as.............
(d) The brightest star in the night sky is...............
(e) Ursa Major constellation appears to revolve around the ..............star in the night sky.
(f) Orion constellation can be used to locate the position of ..............star whereas Ursa Major constellation can be used to locate the ...................star in the night sky.
(g) The planet which is farthest from the Sun is............
(h) The planet which appears reddish in colour is.............
(i) The small heavenly bodies revolving around the Sun between the orbits of Mars and Jupiter are called ….
(j) Asteroids are found between the orbits of ............and............
(k) Shooting stars are actually not..............
(l) A celestial body that revolves around a planet is known as.........
(m) A meteoroid becomes a............on entering Earth's atmosphere.
(n) The long-distance transmission of television programmes has been made possible with the help of .......... satellites.
(a) The correct answer is ………... twinkle.
Stars twinkle because we are able to see them through the thick layers of turbulent atmosphere.
(b) The correct answer is ……. star and …...constellation.
The constellation Orion is visible during winter in the late evenings. It also has seven or eight bright stars.
(c) The correct answer is …… constellation.
The stars forming a group that has a recognisable shape is called a constellation. We can easily identify them in the night sky.
(d) The correct answer is ……. Sirius.
Sirius is a star system and the brightest star in the Earth's night sky.
(e) The correct answer is …… Pole.
Ursa Major can be seen during summer time in the early part of the night. It has seven prominent stars.
(f) The correct answer is ……. Sirius and ……Pole.
Orion is clearly visible in the night sky from November to February. The pole star is the star which remains fixed at the same place in the sky in the North.
(g) The correct answer is ……. Neptune.
Neptune is the farthest planet from the Sun. It is the fourth largest planet in the Solar System.
(h) The correct answer is ……… Mars.
Mars appears slightly reddish in colour and is also called the red planet. It has two small natural satellites.
(i) The correct answer is …... asteroids.
Asteroids are the celestial objects which are also called minor planets. Asteroids can only be seen through large telescopes.
(j) The correct answer is …... Mars and …... Jupiter.
Asteroids are the celestial objects which are also called minor planets. Asteroids can only be seen through large telescopes.
(k) The correct answer is ……. Stars.
Meteors are commonly known as shooting stars, although they are not stars. A meteor is usually a small object that occasionally enters the earth’s atmosphere.
(l) The correct answer is …… satellite.
A body revolving around another body is called a satellite. Moon is the natural satellite of the Earth. Some planets also have natural satellites.
(m) The correct answer is …. meteor.
Meteors are commonly known as shooting stars, although they are not stars. A meteor is usually a small object that occasionally enters the earth’s atmosphere.
(n) The correct answer is …... artificial.
Artificial satellites are man-made. They are launched from the Earth.