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  • Class 8 Science Study Material

An Educational platform for Preparation and Practice Class 8. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 8. This study material help Class 8, Science students in learning every aspect of Stars And The Solar System . Students can understand Stars And The Solar System concept easily and consolidate their learning by doing Online Practice Tests on Science,Stars And The Solar System chapter repeatedly till they excel in Class 8, Stars And The Solar System . Free ONLINE PRACTICE TESTS on Class 8, Stars And The Solar System comprise of Hundreds of Questions on Stars And The Solar System , prepared by the highly professionals team. Every repeat test of Stars And The Solar System will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Stars And The Solar System . Attempt ONLINE TEST on Class 8,Science,Stars And The Solar System in Academics section after completing this Stars And The Solar System Question Answer Exercise.


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Stars And The Solar System
The distance between the earth and the sun is approximately

a) 1.6 x 105 light years.
b) 1.6 x 103 light years.
c) 1.6 x 10-2 light year.
d) 1.6 x 10-5 light year.


✔Answer
✔Solution
Correct Answer Is : 1.6 x 10-5 light year.
Solution Is : 1 Light Year = 9.46 x 10 12 km The distance between Earth & Sun = 1.5 x 10 8 km = (1.5 x 10 8 km ) / (9.46 x 10 12 km / 1 Light Year) = 1.6 x 10 -5 Light Year
The distance between the earth and the sun is approximately 150,000,000 km. The time taken by the light ray emitted by the sun to reach the earth is

a) 7 minutes 20 seconds.
b) 8 minutes 20 seconds.
c) 9 minutes 20 seconds.
d) 9


✔Answer
Correct Answer Is : 8 minutes 20 seconds.
Solution Is :
The speed of the artificial satellites used for long distance communication is so adjusted that they complete

a) One revolution around the earth in 24 hours.
b) Two revolution around the earth in 24 hours.
c) Three revolution around the earth in 24 hours.
d) Four revolution around the earth in 24 hours.



✔Answer
✔Solution
Correct Answer Is : One revolution around the earth in 24 hours.
Solution Is : The speed of the artificial satellites used for long distance communication is so adjusted that the satellite appears to be stationary with respect to the transmitting station on the ground. Therefore, it should revolve only once around the earth in 24 hours.
On a full moon day, the

a) Moon lies in between the Earth and the Sun.
b) Earth lies in between the moon and the Sun.
c) Sun lies in between the Earth and the moon.
d) Sun lies at the top of moon and earth.



✔Answer
✔Solution
Correct Answer Is : Earth lies in between the moon and the Sun.
Solution Is : Moon does not has light of its own and reflects the light of the Sun falling on it. On a full moon day, the Earth, the moon and the Sun lie in a straight line. When Earth lies in between the Sun and the moon, light rays falling on the moon surface reach to the Earth after reflection. This condition is responsible for the complete visibility of moon on a full moon day.
A planet that has rings is

a) Saturn.
b) Pluto.
c) Uranus.
d) Jupiter.



✔Answer
✔Solution
Correct Answer Is : Saturn.
Solution Is : Rings of the Saturn are made mostly of ice and rock pieces. It looks like one big band, but is actually many small bands which are combined together. The particles range in size from a couple centimeters to over a kilometer in size.
Orion constellation is also called

a) Great Bear.
b) Saptarshi.
c) Hunter.
d) Letter `W`.



✔Answer
✔Solution
Correct Answer Is : Hunter.
Solution Is : Orion constellation has seven to eight bright stars arranged in such a way that they appear as a hunter.
Halley`s comet will next appear in the inner solar system in the year

a) 2076
b) 2016
c) 2061
d) 2080


✔Answer
✔Solution
Correct Answer Is : 2061
Solution Is : Halley`s comet appears after every 75 or 76 years. It was last seen in 1986.
For communication we use the

a) Moon.
b) Triton.
c) Titan.
d) EDUSAT.


✔Answer
✔Solution
Correct Answer Is : EDUSAT.
Solution Is : For communication we use the artificial satellite, EDUSAT. Artificial satellites are closer to Earth than the Moon. Moreover, they neither have equatorial orbit nor polar orbit, which makes a satellite useful for different purposes.
Pole star does not change its position

a) It lies 450 north of the axis of the earth.
b) It lies on the axis of rotation of the earth.
c) It lies on 30
d) It lies close to the moon.


✔Answer
✔Solution
Correct Answer Is : It lies on the axis of rotation of the earth.
Solution Is : The pole star is situated directly above the geographic north-pole of the earth`s axis. Thus, its position relative to the earth does not change and hence, it appears stationary.
The star that is nearest to the Earth after the Sun is

a) Alpha Centauri
b) Pole star.
c) Shooting star.
d) Moon.



✔Answer
✔Solution
Correct Answer Is : Alpha Centauri
Solution Is : Sun is the closest star to the Earth at a distance of about 92 million miles. The next closest star is Alpha Centauri, which is 4.3 light-years away.

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