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SSC > Physical Geography

Explore popular questions from Physical Geography for SSC. This collection covers Physical Geography previous year SSC questions hand picked by experienced teachers.

Q 1.

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Which amidst the following planets has its orbit closest to Sun ?

Venus

B

Mars

C

Jupiter

D

Uranus

Explanation

Venus is the brightest planet in our sky and can sometimes be seen with the naked eye if we know where to look. It is the solar system's brightest planet — yellow clouds of sulfuric acid reflect the sun's light brightly and has its orbit closest to sun but only next to mercury.

Q 2.

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The asteroids revolve round the Sun in between :

A

Earth and Mars

Mars and Jupiter

C

Jupiter and Saturn

D

Saturn and Uranus

Explanation

Asteroids, sometimes called minor planets, are small, rocky fragments left over from the formation of our solar system about 4.6 billion years ago. Most of this ancient space rubble can be found orbiting the sun between Mars and Jupiter. Asteroids range in size from Ceres, about 952 km (592 miles) in diameter, to bodies that are less than 1 km across. The total mass of all the asteroids is less than that of Earth's Moon.

Q 3.

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Brightest planet in our solar system is

Venus

B

Mercury

C

Mars

D

Jupiter

Explanation

Venus has the highest albedo of any planet in our solar system. Venus is so bright partly because it reflects over 70 per cent of sunlight striking it. It owes its reflective ability to the fact that it's blanketed with clouds. Sunlight bouncing from these clouds is what makes Venus so bright.

Q 4.

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Which type of lake is formed by volcanic activities ?

Caldera lake

B

Karst lake

C

Lagoon

D

Fresh water lake

Explanation

Caldera refers to a large basin-shaped Crater that is bound by steep cliffs. The Caldera best known in North America is Crater Lake.

Q 5.

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Which one of the following is called a red planet ?

A

Venus

B

Mercury

Mars

D

Jupiter

Explanation

Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth.

Q 6.

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The Milky Way Galaxy was first observed by

Galileo

B

Maarten Schmidt

C

Marconi

D

Newton

Explanation

The Milky Way is the galaxy that contains our solar system. This name derives from its appearance as a dim "milky" glowing band arching across the night sky, in which the naked eye cannot distinguish individual stars. Observational evidence for the Milky Way being made up of distant stars first came when Galileo pointed his telescope towards the Milky Way, observing a large amount of faint stars.

Q 7.

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The light from the Sun reaches the Earth in about—

A

8 seconds

8 minutes

C

10 seconds

D

10 minutes

Explanation

Light travels at 186,000 miles a second at the Earth is 93 million miles to Sun on average. This works out as 8.33 minutes for light from the Sun to reach Earth. On average, it takes energy between 10,000 and 170,000 years to leave the sun's interior and then be emitted from the surface as light. Sunlight, in the broad sense, is the total frequency spectrum of electromagnetic radiation given off by the Sun, particularly infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through the Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon.

Q 8.

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Mushroom Rocks are the typical land forms seen in

A

River Valleys

B

Mountain tops

C

Coastal areas

Desserts

Explanation

A mushroom rock, also called rock pedestal or a pedestal rock, is a naturally occurring rock whose shape, as its name implies, strikingly resembles a mushroom. Usually found in dessert areas, these rocks are formed over thousands of years when wind erosion of an isolated rocky outcrop progresses at a different rate at its bottom to that at its top.

Q 9.

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The surface temperature of the sun is estimated as

6000 °C

B

12000 °C

C

18000 °C

D

24000 °C

Explanation

The surface of the sun is called the photosphere. The photosphere is 340 miles thick and it's temperature s range from 5,500°C to 6,000°C. It has dark spots called sunspots which are the only solar activity observable by the naked eye.

Q 10.

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Which is the hottest planet in the Solar System ?

A

Jupiter

B

Saturn

Venus

D

Uranus

Explanation

Mercury is closer to the sun, but the atmosphere on Venus actually makes it hotter. Even on the night side, the temperature doesn't drop by much (comparatively) because of the carbon dioxide, about 95%, atmosphere. The atmospheric pressure of Venus is also about 90 times greater than that of Earth.

Q 11.

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Which of the following is called the twin of the earth ?

A

Neptune

Venus

C

Mars

D

Saturn

Explanation

Venus is the second planet from the sun and a close neighbor to the earth. It was named after the Roman Goddess of Beauty. Venus is usually one the brightest objects in the sky, which might be the reason it got its name. It is quite similar to the planet earth mainly in its size and a few other characteristics which is why it is often considered the Earth's twin. However, surface conditions are not nearly the same making it a quite inhospitable environment.

Q 12.

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Which one of the following planets has no moon?

A

Mars

B

Neptune

Mercury

D

Pluto

Explanation

Mercury and Venus are the only two recognized planets in our solar system without moons. However, there are many, many planets in the universe and a significant portion of these, if our solar system is assumed representative of at least a significant portion of the universe's planetary systems likely have no moons.

Q 13.

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Consider the following geological phenomena:
I. Development of a fault
II. Movement along a fault
III. Impact produced by a volcanic eruption
IV. Folding of rocks
Which of the above causes earthquakes ?

I, II and III

B

II and IV

C

I, III and IV

D

I to IV

Explanation

Earthquakes are caused by faulting, a sudden lateral or vertical movement of rock along a rupture (break) surface. Earthquakes often occur in volcanic regions and are caused there, both by tectonic faults and the movement of magma in volcanoes. Such earthquakes can serve as an early warning of volcanic eruptions, as during the Mount St. Helens eruption of 1980.

Q 14.

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The west to east extension of the Himalayas is from

Indus gorge to Dihang gorge

B

K2 to Chomoihari

C

NangaParbatto NamchaBaiwa

D

Rakaposhi to Lohit river

Explanation

The Himalayas, geologically young and structurally fold mountains stretch over the northern borders of India. These mountain ranges run in a west-east direction from the Indus to the Brahmaputra. The Brahmaputra marks the eastern most boundary of the Himalayas. Beyond the Dihang gorge, the Himalayas bend sharply to the south and spread along the eastern boundary of india.

Q 15.

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Most of the devastating earthquakes are usually caused by

A

Eustatic movement

B

Isostatic adjustment

Collision of earth plates

D

Volcanic eruption

Explanation

An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The world's earthquakes are not randomly distributed over the Earth's surface. They tend to be concentrated in narrow zones. An explanation is to be found in plate tectonics, a concept which has revolutionized thinking in the Earth's sciences. Plate tectonics tells us that the Earth's rigid outer shell (lithosphere) is broken into a mosaic of oceanic and continental plates which can slide over the plastic asthenosphere, which is the uppermost layer of the mantle. The plates are in constant motion. Where they interact, along their margins, important geological processes take place, such as the formation of mountain belts, earthquakes, and volcanoes.

Q 16.

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Why are winters more severe in Southern Hemisphere than in Northern Hemisphere?

Earth is titled towards the sun in the Northern Hemisphere

B

Northern Hemisphere receives more sunlight

C

Because of more iceberg activity in Southern Hemisphere

D

Southern Hemisphere is less inhabited

Explanation

The winter in the Southern Hemisphere occurs when the Northern hemisphere is tilted more toward the Sun. From the perspective of an observer on the Earth, the winter Sun has a lower maximum altitude in the sky than the summer Sun.

Q 17.

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Shale is metamorphosed into which of the following rocks?

A

Graphite

B

Gneiss

C

Marble

Slate

Explanation

From depth of burial by continual sediment deposition from above, or from compressional stress from tectonic plate collisions, shale is metamorphosed into slate over periods of millions of years. During this compression, the clay minerals making up the shale decompose as they become unstable in the high pressure environment, and their chemical components are gradually transformed into minerals that are more stable in the newly forming higher pressure environment.

Q 18.

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Hanging Valley is formed due to the action of

Glacier

B

River

C

Ocean

D

Wind

Explanation

A hanging valley is a tributary valley with the floor at a higher relief than the main channel into which it flows. They are most commonly associated with U-shaped valleys when a tributary glacier flows into a glacier of larger volume. The main glacier erodes a deep U-shaped valley with nearly vertical sides while the tributary glacier, with a smaller volume of ice, makes a shallower U-shaped valley. Since the surfaces of the glaciers were originally at the same elevation, the shallower valley appears to be 'hanging' above the main valley

Q 19.

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On which of the following planets water cycle is available ?

A

Jupiter

Earth

C

Mars

D

Venus

Explanation

The water cycle, also known as the hydrological cycle or H2O cycle, describes the continuous movement of water on, above and below the surface of the Earth. Although the balance of water on Earth remains fairly constant over time, individual water molecules can come and go, in and out of the atmosphere. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, runoff, and subsurface flow. In so doing, the water goes through different phases: liquid, solid (ice), and gas (vapor).

Q 20.

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The largest planet in our solar system is

A

Mars

Jupiter

C

Saturn

D

Mercury

Explanation

Jupiter is the fifth planet from the Sun and is the largest planet in the solar system. If Jupiter were hollow, more than one thousand Earths could fit inside. It also contains two and a half times the mass of all the other planets combined. It has a mass of 1.9 x 1027 kg and is 142,800 kilometers (88,736 miles) across the equator.

Q 21.

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Where are the hot deserts generally found ?

A

On the eastern margins of the Tropics

On the western margins of the Tropics

C

Nearer the Equator

D

In the middle of the Continents

Explanation

The deserts lie in the belt of the trade winds which blow from northeast in the northern hemisphere and southeast in the southern hemisphere. Therefore, the general direction of the trade winds is from the east to west. These winds shed their moisture on the eastern margins of the continents and by the time they reach the west they have lost their moisture. The hot desert climate is found around the tropics of Capricorn and Cancer, usually on the west side of continents. Examples are the Thar Desert in Pakistan and the Atacama desert in Chile.

Q 22.

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Basaltic lava is found in the

Deccan Trap

B

Himalayas

C

Indo-Gangetic Plain

D

North-Eastern Hills

Explanation

The Deccan Traps are a large igneous province located on the Deccan Plateau of west-central India (between 17°-24°N, 73°-74°E) and one of the largest volcanic features on Earth. They consist of multiple layers of solidified flood basalt that together are more than 2,000 m (6,562 ft) thick and cover an area of 500,000 km2 (193,051 sq mi) and a volume of 512,000 km3 (123,000 cu mi). The term "trap", used in geology for such rock formations, is derived from the Swedish word for stairs and refers to the steplike hills forming the landscape of the region.

Q 23.

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The study of heavenly bodies is known as :

A

Astrology

B

Astronautics

Astronomy

D

Astrophysics

Q 24.

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Comets revolve around :

sun

B

earth

C

Venus

D

no single heavenly body

Q 25.

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Which of the following Is the brightest planet :

A

Mercury

Venus

C

Mars

D

Jupiter