InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The solid part of the Earth is called ………… A) BiosphereB) Lithosphere C) Hydrosphere D) Atmosphere |
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Answer» B) Lithosphere |
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| 52. |
The number of planets in the solar system is A) 5 B) 7 C) 8 D) 9 |
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Answer» Correct option is C) 8 |
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| 53. |
Match the followingGroup-AGroup-B1. World Environment DayA) April 22nd2. World Earth DayB) September 16th3. World Water DayC) June 5th4. World Ozone DayD) March 22nd |
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| 54. |
Mention the theories about the origin of the Solar system. |
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Answer» There are many theories about the origin of the Solar system. Some of them are : 1. Geocentric theory 2. Heliocentric theory |
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| 55. |
Collect and list the elements of the human environment in your surroundings and find out how they are formed. |
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Answer» List of elements of human environment in our surroundings. Individual, family, community, religion, politics, education. How they are formed : After the settled life was formed, human beings started depending on one another. It resulted in the establishment of human environment. After the invention of agriculture human beings starts to live together, next form community with the number of families, next with their beliefs and emotions, mystical feelings they from religion. Next for better and order living formed as rulers and after invention of letters education started. |
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| 56. |
Observe the things in the categorize them under the headings in the given table.Natural EnvironmentHuman EnvironmentMan-made Environment |
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| 57. |
What is meant by Man-made environment? |
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Answer» Oursurroundings which are made by the human beings are called Man-made environment. |
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| 58. |
The solid part of the Earth is called ________. |
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Answer» The solid part of the Earth is called Lithosphere. |
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| 59. |
Which is the third planet in the Solar system? A) Earth B) Mars C) JupiterD) Venus |
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Answer» Correct option is A) Earth |
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| 60. |
What is meant by Human environment? |
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Answer» Our surroundings which are formed with human beings are called Human environment. |
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| 61. |
Which is the third layer of the interior of the Earth? i) Mantle ii) Inner core iii) Outer core iv) Crust A) (i) B) (ii) C) (i) & (ii) D) (iv) |
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Answer» Correct option is C) (i) & (ii) |
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| 62. |
The word “Biosphere” originates from the …………… word ‘Bios’A) Greek B) Latin C) English D) Spanish |
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Answer» B) Hydrosphere |
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| 63. |
Define Biosphere. |
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Answer» Biosphere is an environment where animals, microorganisms, Humans and plants live together. |
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| 64. |
The Biosphere would not have survived without the other three spheres. Why? |
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Answer» Earth’s living things make up the biosphere. The living portion of the Earth interacts with all the other sphere. Living things need water (hydrosphere), chemicals from the atmosphere and nutrients gained by eating things in the biosphere. Plants and animals grow in geosphere, they absorb water from hydrdsphere, we get other gases and carbon dioxide from atmosphere. So, Biosphere depends on all these spheres. |
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| 65. |
What is a star? What is its composition and how was it formed? |
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Answer» Stars are the fundamental building blocks of galaxies. Stars were formed when the galaxies were formed during the big bang. Stars produce heat, light, ultra violet rays and other forms of radiation. They are largely composed of gas and plasma. Stars are built by hydrogen gases. Hydrogen atom fuse together to form helium atoms and in the process they produce large amount of heat. |
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| 66. |
What is a special characteristic of the planet Mars? |
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Answer» The highest and the longest mountain in the solar system ‘Olympus Mons’ is located on Mars. |
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| 67. |
Give reason:Mars is called the Red Planet. |
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Answer» As the soil on the Mars contains iron its colour is reddish. Hence Mars is also called the Red Planet. |
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| 68. |
Estimate the mass of the sun, assuming the orbit of Earth around the sun to be a circle. The distance between the sun and the Earth is `1.49 xx 10^(11) m`, and `G = 6.67 xx 10^(-11) Nm^(2) kg^(-2)`. |
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Answer» Correct Answer - `2.01xx10^(30)kg` |
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| 69. |
The period of revolutions of Mars around th esun is 1.881 year and its mean distance from the sun is `1.524AU`. Calculate the mass of sun `(1AU=1.496xx10^(11)m)`. |
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Answer» Correct Answer - `1.998xx10^(30)kg` |
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| 70. |
Phobo is a satellite of Mars. The period of its revolution around Mars is 0.319 days and its mean distance from Mars is `9.519xx10^(6)m`. Assuming that the mass of Phobos is negligible compared to that of Mars, calculate the mass of Mars. Take `G=6.668xx10^(-11)Nm^(-2)kg^(-2)` |
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Answer» Correct Answer - `5.677xx10^(24)kg` |
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| 71. |
Find the period of revoluition of planet Mars about the sun if mean distance of the Mars from the sun is 1.52AU. |
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Answer» Correct Answer - `1.87` yr |
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| 72. |
The angular diameter of the sun is 1920". If the distance of the sun from the earth is `1.5xx10^(11)`m, what is the linear diameter of the sun ? |
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Answer» Correct Answer - `1.4xx10^(9)m` |
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| 73. |
In the echo method of estimating distnces, a radar signa was sent towards the Mars. If the echo was received after 8 minute 20 second, how far wat the Mars from the earth at that instant? |
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Answer» Correct Answer - `7.5xx10^(10)m` |
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| 74. |
The universe isA. expandingB. contractingC. constant in sizeD. increasing northwards and decresing southwards |
| Answer» Correct Answer - (a) | |
| 75. |
What are the components of Environment? |
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Answer» Natural, Human and Manmade are the components of Environment. |
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| 76. |
Find the distance of a heavenly object from the earth if the parallactic angle as measured from two places at a distance of `6.284xx10^(6)m` apart is `2^(@)`. |
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Answer» Correct Answer - `1.8xx10^(8)m` |
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| 77. |
What is a satellite? What are the two types of satellites? |
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Answer» A body moving in an orbit around a planet is called satellite. The two types of satellites are natural and artificial. Earth’s natural satellite is the moon. |
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| 78. |
Give reason:Comets are visible when they are close. |
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Answer» Comets are formed out of ice and dust particles. They appear like points when they are far away from the sun, but when they are close to the sun they become easily visible to us because of the shorter distance and the heat of the sun. |
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| 79. |
Write a note on the inner planets. |
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Answer» The planets are spaced unevenly. The first four planets are relatively close together and close to the Sun. They form the inner solar system. The four planets grouped together in the inner solar system are Mercury, Venus, Earth and Mars. They are called inner planets. They have a surface of solid rock crust and so are called terrestrial or rocky planets. Their insides, surfaces and atmospheres are formed in a similar way and form similar pattern. Our planet, Earth can be taken as a model of the other three planets. |
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| 80. |
Write about comets in brief. |
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Answer» Comets are lumps of dust and ice that revolve around the Sun in highly elliptical orbits. Their period of revolution is very long. When approaching the Sun, a comet vaporizes and forms a head and tail. Some of the biggest comets even seen had tails 160 million (16 crores) km long. Many comets are known to appear periodically. One such comet is Halley’s Comet, which appears after nearly every 76 years. It was last seen in 1986. It will next be seen in 2062. |
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| 81. |
The sepctrum of stars is most closely related toA. colourB. pressureC. distance from earthD. mass |
| Answer» (a) The spectrum of star is most closely related to colour. | |
| 82. |
What is a Dwarf Planet? |
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Answer» A small sized celestial body that revolves independently around the sun is called the dwarf planet. |
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| 83. |
The brightest pianet in the solar system isA. MarsB. JupiterC. VenusD. Mercury |
| Answer» (c ) Venus is the brigtest planet in the solar system. | |
| 84. |
The planet which has no atmosphere isA. VenusB. MercuryC. MarsD. Earth |
| Answer» (d) Mercury is the planet among the given options which has no atmosphere. | |
| 85. |
Fill in the blanks.i. ………….. is the brightest planet in the solar system.ii. ………….. is the hottest planet.iii. As the earth is a ………….. there is a magnetic field around the earth.iv. Mars is also called the ………….. .v. As the soil on Mars contains ………….. its colour is reddish. |
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Answer» i. Venus ii. Venus iii. magnet iv. Red planet v. iron |
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| 86. |
How much time does the earth take to complete one rotation and one revolution? |
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Answer» The earth completes one rotation in 24 hrs and one revolution in 365 days i.e. 1 year. |
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| 87. |
Fill in the blanks.i. ………….. planets of the size of the earth can get accommodated on Jupiter.ii. Jupiter is called as ………….. .iii. Saturn mass is ………….. times that of the earth.iv. ………….. cannot be seen without a telescope.v. Winds blow with extremely high speed on ………….. . |
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Answer» i. 1397 ii. The stormy planet iii. 95 iv. Uranus v. Neptune |
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| 88. |
Which planet do not have rings around them? |
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Answer» Mercury, Venus, Earth and Mars do not have rings around them. |
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| 89. |
Which planet doesn’t have atmosphere? |
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Answer» Mercury doesn’t have atmosphere. |
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| 90. |
How does the sun move in the Milky Way? |
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Answer» The sun rotates around its axis and while doing so, it revolves around the centre of the Milky Way taking the solar system along with it. |
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| 91. |
Fill in the blanks.i. ……… is the satellite of the earth.ii. The moon’s period of ……… and ……… are both of 27.3 days.iii. ………….. is classified as a dwarf planet.iv. Pluto takes ………….. years to complete its revolution around the sun.v. ………….. are formed out of ice and dust particles.vi. ………….. lake in Maharashtra has been formed by the impact of such a meteorite. |
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Answer» i. The moon ii. rotation, revolution iii. Pluto iv. 248 v. Comets vi. Lonar |
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| 92. |
Sirius `A` and Sirius `B` are two components of Sirius binary. The distance between the two components is `20.3AU` and the period of revolution about their common centre of mass is 49.9 years. If the ratio of the masses of two components os 2.356, find the mass of the two components. |
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Answer» Correct Answer - 1 solar mas, 2.356 solar masses |
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| 93. |
Energy emitted per second per unit area by Rigal star in Constellation Orion is 17000 times that emited by the sun. What is the surface temperature of that star if that of the sun is `6000K`? |
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Answer» Correct Answer - `6.91xx10^(4)K` |
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| 94. |
Define Universe. |
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Answer» The Universe is a vast space that contains many unimaginable elements. |
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| 95. |
Which planet is farthest to Sun ?A. SaturnB. UranusC. NeptuneD. Pluto |
| Answer» (d) In comparison to the respective distances of all the planets from the sun, pluto is farthest to Sun | |
| 96. |
Define time period of a satellite. |
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Answer» Time taken by the satellite to complete one revolution round the Earth is called time period. Time period, T = Distance covered/Orbital velocity T = 2πr/v |
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| 97. |
The environment where microorganisms live A) Biosphere B) Exosphere C) Stratosphere D) Ionosphere |
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Answer» Correct option is A) Biosphere |
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| 98. |
The planet which has no satellite isA. neptuneB. MercuryC. JupiterD. Mars |
| Answer» (b) Mercury is the planet which has no satellite. | |
| 99. |
One astronomical unit (AU) is equal toA. `10^(-10)`mB. `1.496xx10^(11)`mC. `9.45xx10^(15)m`D. `4.964xx10^(11)m` |
| Answer» (b) One astronomical unit is equal to `1.496xx10^(11)`m. | |
| 100. |
How can we increase Oxygen level in the atmosphere? |
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Answer» We can increase oxygen level in the atmosphere by three ways. 1. Afforestation – Trees are the absolute source of oxygen. 2. Reducing the use of nonbiodegradable things like plastics. 3. Reducing the test of different bombs, missiles etc. |
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