{"id":13176,"date":"2020-10-13T19:37:10","date_gmt":"2020-10-13T14:07:10","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=13176"},"modified":"2022-03-02T11:16:21","modified_gmt":"2022-03-02T05:46:21","slug":"stars-and-the-solar-system-class-8-extra-questions","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/stars-and-the-solar-system-class-8-extra-questions\/","title":{"rendered":"Stars and the Solar System Class 8 Extra Questions and Answers Science Chapter 17"},"content":{"rendered":"

Stars and the Solar System Class 8 Extra Questions and Answers Science Chapter 17 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science<\/a> Question bank on a regular basis.<\/p>\n

Class 8 Science Chapter 17 Extra Questions and Answers Stars and the Solar System<\/h2>\n

Extra Questions for Class 8 Science Chapter 17 Stars and the Solar System with Answers<\/strong><\/p>\n

Stars and the Solar System Class 8 Extra Questions Very Short Answer Type<\/h3>\n

Question 1.
\nWhat is the brightest object in the night sky?
\nAnswer:
\nThe moon is the brightest object in the night sky.<\/p>\n

\"Stars<\/p>\n

Question 2.
\nMoon revolves around, which celestial body?
\nAnswer:
\nThe moon revolves around the Earth.<\/p>\n

Question 3.
\nWhich celestial bodies revolve round the Sun?
\nAnswer:
\nPlanets along with their satellites, comets, asteroids.<\/p>\n

Question 4.
\nWhen did man land on the moon for the first time?
\nAnswer:
\nMan landed on the moon for the first time on July 21, 1969.<\/p>\n

Question 5.
\nWho was the first human being to set foot on the moon?
\nAnswer:
\nNeil Armstrong was the first human being to set foot on the moon.<\/p>\n

Question 6.
\nWho was the second astronaut who landed on the moon after Neil Armstrong?
\nAnswer:
\nEdwin Aldrin was the second astronaut who landed on the moon.<\/p>\n

Question 7.
\nWhat is the speed of light in air?
\nAnswer:
\nThe speed of light in air is 3 \u00d7 105 km per second.<\/p>\n

Question 8.
\nWhich direction do stars move?
\nAnswer:
\nStars move from east to west.<\/p>\n

Question 9.
\nIs there any change in the shape of the constellations?
\nAnswer:
\nThe shape of the constellations does not change.<\/p>\n

Question 10.
\nWhat is the other name of Orion?
\nAnswer:
\nThe other name of the Orion is Hunter.<\/p>\n

\"Stars<\/p>\n

Question 11.
\nWhat does Cassiopeia look like?
\nAnswer:
\nCassiopeia looks like a distorted letter W or M.<\/p>\n

Question 12.
\nPlanets shine like stars. Do planets have light of their own?
\nAnswer:
\nAlthough the planets shine like stars, but they do not have light of their own.<\/p>\n

Question 13.
\nDo all planets have satellites ?
\nAnswer:
\nNot all planets, but some of them have satellites.<\/p>\n

Question 14.
\nDoes Venus have moon ?
\nAnswer:
\nVenus does not have moon or satellite of its own.<\/p>\n

Question 15.
\nName the only planet in the solar system which has life on its surface.
\nAnswer:
\nThe Earth is the only planet in the solar system where life is known to exist.<\/p>\n

Question 16.
\nWhat is called equatorial plane of the Earth?
\nAnswer:
\nThe plane of the equator is called the equatorial plane of the Earth.<\/p>\n

Question 17.
\nWhich planet is the first outside from Earth (Orbit) in terms of distance from the Sun?
\nAnswer:
\nIt is Mars.<\/p>\n

Question 18.
\nCompare the mass of Jupiter with that of Earth.
\nAnswer:
\nMars of Jupiter is about 318 times that of Earth.<\/p>\n

Question 19.
\nWhich is the largest planet of the solar system?
\nAnswer:
\nThe largest planet of the solar system is Jupiter.<\/p>\n

Question 20.
\nDoes Jupiter have rings?
\nAnswer:
\nYes, Jupiter has faint rings around it<\/p>\n

\"Stars<\/p>\n

Question 21.
\nName the outermost planets of the solar system.
\nAnswer:
\nUranus and Neptune are the outermost planets of the solar system.<\/p>\n

Question 22.
\nWhat is the other name of shooting star?
\nAnswer:
\nThe other name of the shooting star is meteor.<\/p>\n

Stars and the Solar System Class 8 Extra Questions Short Answer Type 1<\/h3>\n

Question 1.
\nWhy was the village sky so different from the night sky in big cities?
\nAnswer:
\nDue to bright lights, smoke and other atmospheric pollution, a clear view of night sky in the big cities is rare, whereas it is possible in the village night sky.<\/p>\n

Question 2.
\nWhat is meant by the term celestial object ? What is the brightest object in the night sky ?
\nAnswer:
\nThe stars, the planets, the moon and many other objects in the sky are called celestial objects. The moon is the brightest object in the night sky.<\/p>\n

Question 3.
\nWhat is the full moon day ? What happens to the moon after full moon day ?
\nAnswer:
\nThe day on which the whole disc of the moon is visible is known as the full moon day. Thereafter, every night the size , of the bright part of the moon decreases.<\/p>\n

Question 4.
\nWhat is new moon day and the crescent moon ? .
\nAnswer:
\nOn the fifteenth day after full moon day, the moon is not visible. This day is known as the new moon day.<\/p>\n

The next day of new moon day, only a small part of the moon appears in the sky, which is called the crescent moon.<\/p>\n

Question 5.
\nHow many rotations are completed by the moon, when it completes one revolution?
\nAnswer:
\nThe moon completes one rotation on its axis as it completes one revolution around the Earth.<\/p>\n

Question 6.
\nWhy do stars appear to us like points, whereas Sun looks bigger?
\nAnswer:
\nThe stars are million times farther away than the Sun. That is why, the stars appear to us like points. On the other hand, The Sun is nearer to the Earth than other stars, so the Sun looks bigger.<\/p>\n

\"Stars<\/p>\n

Question 7.
\nHow far is the Sun from the Earth? Which is the next star nearest to the Earth?
\nAnswer:
\nThe Sun is nearly 150,000,000 kilometres (150 million km) away from the Earth. The next nearest star to the Earth is the Alpha Centauri.<\/p>\n

Question 8.
\nWhat is the distance of Alpha Centauri from Earth?
\nAnswer:
\nThe next nearest star to the Earth after the Sun is Alpha Centauri, which is at a distance of about 40,000,000,000,000 km from the Earth.<\/p>\n

Question 9.
\nDoes the Pole star move? Is it a star or a planet?
\nAnswer:
\nThe Pole star is not a planet. It is a star. The Pole star does not appear to move like other stars as it lies close to earth\u2019s axis of rotation.<\/p>\n

Question 10.
\nWhat is an orbit?
\nAnswer:
\nA planet has a definite path in which it revolves around the Sun. This path is called an orbit.<\/p>\n

Question 11.
\nWhat is the period of revolution? What happens if distance of a planet from the Sun increases?
\nAnswer:
\nThe time taken by a planet to complete one revolution is called its period of revolution. The period of revolution increases as the distance of the planet from the Sun increases.<\/p>\n

\"Stars<\/p>\n

Question 12.
\nWhat is the period of rotation?
\nAnswer:
\nThe time taken by the planet to complete one rotation is called its period pf rotation.<\/p>\n

Question 13.
\nWhat is meant by the term satellite? What is moon?
\nAnswer:
\nA body revolving around another body is called a satellite. Generally, we use the term satellite for the bodies revolving around a planet. Moon is the natural satellite of the Earth.<\/p>\n

Question 14.
\nWhat do you understand by natural satellite?
\nAnswer:
\nAny celestial body revolving around another celestial body is called its natural satellite.<\/p>\n

Question 15.
\nWhat do you understand by artificial satellite?
\nAnswer:
\nThere are many man-made satellites revolving round the Earth. These are called artificial satellites of the Earth.<\/p>\n

Question 16.
\nWhat is unusual in the rotation of Venus?
\nAnswer:
\nThe rotation of Venus on its axis is somewhat unusual. It rotates from east to west while the Earth rotates from west to east.<\/p>\n

\"Stars<\/p>\n

Question 17.
\nWhy is Venus called a morning or an evening star?
\nAnswer:
\nSometimes Venus appears in the eastern sky before sunrise. Sometimes it appears in the western sky just after sunset. That is why, it is often called a morning or an evening star, although it is not a star.<\/p>\n

Question 18.
\nHow is Venus observed in the sky?
\nAnswer:
\nVenus cannot be observed very high in the sky. It can be observed either 1-3 hours before sunrise’ or 1-3 hours after sunset.<\/p>\n

Question 19.
\nDoes Venus show phases like moon?
\nAnswer:
\nIf Venus is observed through a telescope, it shows phases just like the moon.<\/p>\n

Question 20.
\nWhy does the Earth appear blue-green from space ?
\nAnswer:
\nFrom space, the Earth appears blue and green due to the reflection of light from water and land mass on its surface.<\/p>\n

Question 21.
\nIs axis of rotation of the Earth perpendicular to the plane of its orbit? How does the change of seasons take place?
\nAnswer:
\nThe axis of rotation of the Earth is not perpendicular to the plane of its orbit. The change of seasons on the Earth is caused due to tilted axis of rotation of Earth.<\/p>\n

Question 22.
\nWhat are equatorial and orbital planes of the Earth?
\nAnswer:
\nThe plane of the equator is called the equatorial plane of the Earth while the plane in which the Earth revolves round the Sun is called the orbital plane of the Earth.<\/p>\n

Question 23.
\nWhy is Mars called the red planet? How many natural satellites does Mars have?
\nAnswer:
\nMars appears slightly reddish and, therefore, it is also called the red planet. Mars has two small natural satellites.<\/p>\n

Question 24.
\nWhich planets are called inner planets?
\nAnswer:
\nMercury, Venus, Earth ajid Mars are much nearer to the Sun than the other planets. They are, therefore, called the inner or terrestrial planets.<\/p>\n

\"Stars<\/p>\n

Question 25.
\n(i) What is the angle (argument) between Earth\u2019s equatorial of orbital plane?
\n(ii) What is the angle between earth\u2019s axis and orbital plane ?
\nAnswer:
\n(i) 23.5\u00b0
\n(ii) 66.5\u00b0<\/p>\n

Stars and the Solar System Class 8 Extra Questions Short Answer Type 2<\/h3>\n

Question 1.
\nWhat is light year? Which is nearest star to the sun and how far away it is?
\nAnswer:
\nLight year is the distance travelled by light in one year. Large distances in the space are measured in light year. The distance of the Sun from the Earth may be said to be about 8 light minutes. The nearest star to the sun is Alpha Centauri. The distance of Alpha Centauri is about 4.3 light years.<\/p>\n

Question 2.
\nWrite four uses of artificial satellites.
\nAnswer:
\nUses of artificial satellites:
\n(a) They help in television and radio transmission.
\n(b) They help in telephonic communication.
\n(c) They help to study and forecast the weather by sending cloud pictures to the Earth, taken from space.
\n(d) They help in locating mineral elements by remote sensing (collecting information from distance).
\n(e) They help the scientists, to explore the universe in a better way. (Any four)<\/p>\n

Question 3.
\nDescribe the Sun in brief.
\nAnswer:
\nThe Sun is the nearest star from us. It is continuously emitting huge amounts of heat and light. The Sun is the source of almost all energy on the Earth. In fact, the Sim is the main source of heat and light to all the planets that revolve around it.<\/p>\n

Question 4.
\nHow can you differentiate between planets and stars?
\nAnswer:
\nThe simplest method of identifying planets from stars is that stars twinkle whereas planets do not. Also, they (planets) appear to change their positions with respect to the stars. A planet has a definite path (orbit) to revolve around the Sun. The stars do not have orbits.<\/p>\n

\"Stars<\/p>\n

Question 5.
\nWhat is meant by outer planets? Describe.
\nAnswer:
\nThe planets outside the orbit of Mars, namely Jupiter, Saturn, Uranus and Neptune are much farther from the Sun than that the inner planets. So, they are called the outer planets. The masses and sizes of the outer planets are much larger than the masses and sizes of the inner planets. They have ring system around them. The outer planets have a large number of satellites.<\/p>\n

Stars and the Solar System Class 8 Extra Questions Long Answer Type<\/h3>\n

Question 1.
\nDescribe
\n(i) Asteroids
\n(ii) Comets
\n(iii) Meteors
\n(iv) Meteorites and
\n(iv) Meteor showers.
\nAnswer:
\n(i) Asteroids: The large number of small objects that revolve around the Sun and occupy the large gaps between the orbits of Mars and Jupiter are called asteroids. These can be seen by large telescopes only.<\/p>\n

(ii) Comets: They are also the members of our solar system. They revolve round the Sun in highly elliptical orbits. The period of their revolution round the Sun is very large.<\/p>\n

The comet has a bright head with a long tail. The length of comet\u2019s tail grows in size as it approaches the Sun. The tail of a comet is always directed away from the Sign. There are many comets which appear only after a definite time period. One of such comets is the Halley\u2019s comet, which takes 76 years to reappear. It was last seen in 1986. The next time it will reappear in 2062.<\/p>\n

(iii) Meteors: Bright streaks of light seen at night in the sky are called shooting stars or meteors. Meteors are usually small heavenly bodies which enters the Earth\u2019s atmosphere with a very high speed, a friction is produced due to which the meteor heats up to such an extent that it burns out in a very short time. That is why the bright streak of light appears for a very short while.<\/p>\n

(iv) Meteorites: Sometimes meteors are so large that a part of them reaches the surface of the Earth before they burn off completely. These are called meteorites. These help the scientists in investigating the nature of the material from which the solar system was formed.<\/p>\n

(v) Meteor showers: When Earth crosses the tail of a comet, swarms of meteors are seen. These are known as meteor showers. Some meteor showers occur at regular times each year.<\/p>\n

\"Stars<\/p>\n

Question 2.
\nWrite a brief note on the planet \u2018Earth\u2019.
\nAnswer:
\nEarth is the only planet in the solar system where life is known to exist. Life exists on Earth because Earth is situated just at the right distance from the Sun. Certain environmental conditions are also responsible for the existence and continuation of life on the Earth. These include presence of water and suitable atmosphere, right temperature range, and a blanket of ozone.<\/p>\n

From the space, the Earth appears blue-green due to the reflection of light from water and landmass on its surface. The axis of rotation of the Earth is not perpendicular to the plane of its orbit. The change in seasons on the Earth is caused, due to this tilt. The Earth has only one satellite, namely moon.<\/p>\n

The equatorial plane and orbital plane of earth are inclined to each other at an angle of 23.5\u00b0. This means that the axis of the Earth is inclined to its orbital plane at and angle of 66.5\u00b0. So, the axis of the Earth makes an angle of 23.5\u00b0 with the perpendicular to the orbital plane.<\/p>\n

Hope the knowledge provided regarding the Stars and the Solar System Class 8 Extra Questions and Answers has helped you to the possible extent. For more info feel free to reach us and we will guide you at the earliest possibility. Stay connected to our site to avail latest updates on Extra Questions for Various Classes instantly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Stars and the Solar System Class 8 Extra Questions and Answers Science Chapter 17 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. Class 8 Science Chapter …<\/p>\n

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