The Moon is Earth's natural satellite. Mars is called the red planet. Orion is a constellation. Venus is often seen as the evening star.
(i) Satellite of Earth - (d) Moon; (ii) Red planet - (c) Mars; (iii) Constellation - (a) Orion; (iv) Planet which is commonly called an evening star - (b) Venus.
For the given riddle: MAN not CAN gives M; ACE and FAN gives A; RAT not CAT gives R; SUN not FUN gives S. Together they spell MARS.
(i) The planet is Mars. (ii) Example riddle 1: My first alphabet is in MOON but not in SOON; my second is in EARTH and also in STAR; my third is in ROSE but not in RISE; my fourth is in SUN but not in FUN. I am a red planet. Answer: Mars. Example riddle 2: My first alphabet is in VERY but not in AERY; my second is in SUN and also in TUNE; my third is in NEST and not in BEST; my fourth is in US and also in SUN; my fifth is in STAR and also in CAR. I am called the evening star. Answer: Venus.
- i. Sirius
- ii. Comets
- iii. Asteroids
- iv. Pluto
Sirius is a star outside our Solar System. Comets and asteroids are smaller objects of the Solar System, and Pluto is a dwarf planet in the Solar System.
(i) Sirius
- i. Jupiter
- ii. Pluto
- iii. Neptune
- iv. Saturn
The chapter lists eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto is not one of these eight planets.
(ii) Pluto
Sirius is the brightest star visible in the night sky, while the Pole Star is important mainly because it appears nearly fixed in the north direction.
Sirius is brighter than the Pole Star.
The planets are arranged by increasing distance from the Sun in the order Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
No, the order shown is not correct. The correct order of planets from the Sun is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
The Big Dipper and Little Dipper are recognised by their ladle-like shapes. The Pole Star lies nearly at the end of the Little Dipper's handle.
Connect the seven bright stars forming the larger ladle-shaped pattern to label the Big Dipper. Connect the smaller ladle-shaped group nearby to label the Little Dipper. The Pole Star is the star at the end of the handle of the Little Dipper and should be labelled there.
Orion is identified by its three belt stars. Sirius is the bright star close to Orion in the sky.
Connect the stars of Orion by first locating the three nearly straight stars of Orion's belt and then joining the surrounding bright stars to make the familiar Orion pattern. Label Sirius as the very bright star near Orion, below and to one side of the constellation in the night-sky view.
Visibility depends on contrast. During daytime, scattered sunlight outshines the stars.
Stars are present in the sky during the day too, but we cannot see them because sunlight is scattered by Earth's atmosphere and makes the sky very bright. The faint light from distant stars is hidden by this brightness. At dusk the sky becomes darker, so stars appear visible again.
Because Earth rotates, most stars appear to move across the sky. The Pole Star lies nearly along Earth's axis of rotation, so it appears almost stationary.
Yes. The Big Dipper appears to change its position with time and seems to move around the Pole Star. The Pole Star appears nearly fixed in the north direction. A rough sketch should show the Big Dipper at different positions around the Pole Star at different times.
This is a creative prompt; any relevant poem or story about the night sky is acceptable.
Sample poem: The night sky opens, deep and wide, With stars like lamps on every side. The Moon sails softly, calm and bright, And planets wander through the night. I look above and start to see, A universe calling out to me.