NCERT Class 8 Science Chapter 17 Stars and the Solar System Extra Questions and Answers
Class 8 Science Chapter 17 Extra Questions and Answers – Stars and the Solar System. Here in this Page Class VIII Students can Learn Extra Questions & Answer 17th Chapter Science fully Inside.
We Provided Here Stars and the Solar System Science Chapter 17 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).’
1) Fill in the blanks:
a) The planet ____ has a rings. (Saturn)
b) ____ was the first Indian artificial satellite. (Aryabhata)
c) Moon is visible due to ____. (Reflected sunlight)
d) The star ____ is the brightest star in the sky. (Sirius)
2) Multiple choice questions:
a) The Sirius is located close to _____ constellation?
a) Leo Major b) Orion c) Cassiopia
Ans. b) Orion
b) The Sun is nearly ____ million km away from the Earth?
a) 150 b) 120
Ans. a) 150
c) The time period between one full-moon to the next full-moon is slightly longer than ____ days?
a) 28 b) 24 c) 29
Ans. c) 29
d) Asteroids are found between the orbits of ____ and ____?
a) Earth, Venus b) Mars, Jupiter
Ans. b) Mars, Jupiter
3) Answer the following questions:
a) What are Great bear and Orion?
Ans. The constellation that we can see during summer time in the early part of the night is Great bear and the constellation that we can see during winter time in the late evening is Orion.
b) What are period of revolution and period of rotation?
Ans. The time period taken by a plant to complete one revolution around the Sun is called period of revolution and the time period taken by a plant to complete one rotation on its own axis is called period of rotation.
c) What is satellite? What is the natural satellite of the Earth?
Ans. Any celestial body revolving around another celestial body is called its satellite.
Moon is the natural satellite of the Earth.
d) Which planet is the brightest planet in the night sky? When does it appear?
Ans. Venus is the brightest planet in the night sky.
Venus appears in the eastern sky before sunrise and in the western sky just after sunset.
e) What is meteorite? What is the function of meteorite?
Ans. Some meteors are large and so they can reach the Earth before they evaporate completely. The body that reaches the Earth is called a meteorite.
Meteorites help scientists in investigating the nature of the material from which the solar system was formed.
4) Match the items of column I with the information of column II:
Column I Column II
a) Mars i) the largest planet of our solar system
b) Halley comet ii) the smallest planet of our solar syste
c) Neil Armstrong iii) the red planet
d) Jupiter iv) appears after nearly every 76 years
e) Mercury v) landed on the moon for the first time
Ans. a) – iii), b) – iv), c) – v), d) – i), e) – ii).
5) At night, when the sky is clear and the moon is not there, you may sometimes see bright steaks of light in the sky. These are commonly known as shooting stars. Although they are not stars. They are called meteors. A meteor is usually a small object that occasionally enters the earth’s atmosphere. At that time it has a very high speed. The friction due to the atmosphere heats it up. It glows and evaporates quickly. That is why the bright steak lasts for a very short time.
a) The meteors are commonly known as _____. (Shooting stars)
b) Why does the bright steak last for a very short time?
Ans. A meteor is usually a small object that occasionally enters the earth’s atmosphere. At that time it has a very high speed. The friction due to the atmosphere heats it up. It glows and evaporates quickly. That is why the bright steak lasts for a very short time.
More extra Questions & Answers
Q.1] fill in the blanks
1] moon is the satellite of the earth.
2] the full moon day is a day on which the whole disc of the moon is visible.
3] Jupiter is the largest planet of solar system.
4] the stars forming a group that has a recognisable shape is called a constellation.
5] a body revolving around another body is called satellite.
6] aryabhatta is called as the first Indian satellite.
7] mercury is the smallest planet in solar system.
Q.2] say whether the following statements are true or false
1] Earth revolves around the sun.
True
2] Mercury is nearest to the sun.
True
3] Constellation that can be seen during full moon day is called as Orion.
False
4] The sun is nearly 1,50,000 km away from the earth.
FALSE
5] Saturn is yellowish in colour.
True
6] Asteroids can be seen through small telescope.
False
7] Venus is called as the morning or evening star.
True
8] There are 3 prominent star in this constellation.
False
3] define the following
1] Full moon day
Answer – the day on which the whole disc of the moon is visible is known as a full moon day.
2] Satellite
Answer – a body revolving around another body is called satellite.
3] Meteors
Answer – meteors is a small object that occasionally enters odds atmosphere.
4] Constellation
Answer – the stars forming a group that has a recognisable shape is called a constellation.
Q.4] answer the following
1] What is an orbit?
Answer – a planet has a definite path in which it revolves around the sun. this path is called orbit.
2] How many prominent stars are there in constellation?
Answer – there are seven prominent stars in the constellation.
3] Name the types of constellation.
Answer – the types of constellation are -Ursa major ,Orion and Cassiopeia.
4] Name the 8 planets in the order of the distance away from the sun.
Answer – the order of the planets away from the sun ES as below :
Mercury, Venus, earth , Mars ,Jupiter, Saturn, Uranus and Neptune.