sheets 6 Flashcards
Question Number,Question,Options,Year
Question Number,Answer,Explanation
1,A meteor is :,a) a rapidly moving star b) a piece of mater which has entered the earth’s atmosphere from outer space c) part of a constellation d) a comet without a tail,1995
1,b,”Meteor is a small celestial body which has entered the earth’s atmosphere by the gravitational force of earth when they pass close to it. Meteors typically occur in the mesosphere, and most range in altitude from 75 km to 100 km.”
2,Which one of the following does not belong to biosphere reserves set-up so far?,a) Great Nicobar b) Sunderbans c) Nanda Devi d) Gulf of Kutch,1995
2,d,”As per the question, the answer is (d). Gulf of Kachchh has been declared a biosphere reserve in 2008. There are 18 notified Biosphere Reserves in India. Out of them, 10 Biosphere Reserves are in the UNESCO’s MAB World Network.”
3,The graph given below shows the mean average monthly temperatures (in ºC) and mean monthly rainfall (in cms) of a place: This graph is indicative of which one of the climatic zones of the world?,a) Wet and dry tropical b) Rainy tropical c) Semi-arid tropical d) Temperate marine,1995
3,a,”In the graph, the temperature ranges from 15° to 25°. So, the graph indicates a wet and dry tropical region, and in this region, rainfall does not exceed 25 cm.”
4,Willy Willy is:,a) a type of tree grown in temperate regions b) a wind that blows in a desert c) a tropical cyclone of the north-west Australia d) a kind of common fish found near Laccadives Islands,1995
4,c,”It is a tropical cyclone off north-west Australia. Willy Willy originates in the Timor Sea and causes rainfall in different parts of Australia.”
5,Which one of the following is the continent with the highest mean elevation in the world?,a) Antarctica b) North America c) Asia d) South America,1995
5,a,”Antarctica is the highest continent on the planet with an average elevation of 7,545 feet above sea level. The elevation of Antarctica at the south pole is 9,300 feet.”
6,Which one of the following layers of the atmosphere is responsible for the deflection of radio waves?,a) Troposphere b) Stratosphere c) Mesosphere d) Ionosphere,1996
6,d,”Ionosphere is the top layer of the atmosphere. Radio waves are deflected in the ionosphere of the atmosphere. The ionosphere is composed of D, E, and F layers. The D layer (60 km from Earth) is good at absorbing AM radio waves.”
7,Given below are two statements one labelled as Assertion (A) and the other labelled as Reason (R). Assertion (A) : Areas near the equator receive rainfall throughout the year. Reason (R) : High temperatures and high humidity cause convectional rain in most afternoons near the equator. In the context of the above two statements, which one of the following is correct?,a) Both A and R are true and R is the correct explanation of A b) Both A and R true but R is not a correct explanation of A c) A is true but R is false d) A is false but R is true,1996
7,”a (Both the assertion and the reason are correct, and the reason correctly explains the assertion)”,”The assertion is correct, and the reason explains it because due to high temperature, the atmospheric air gets heated and rises up. It cools down and precipitates while the cool air descends down to take the place of the vacuum.”
8,Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R) : Assertion (A) : Mangroves are very specialised forest eco-systems of tropical and sub-tropical regions bordering certain sea coasts. Reason (R) : They stabilise the shoreline and act as bulwark against encroachments by the sea. In the context of the above two statements, which one of the following is correct?,a) Both A and R are true and R is the correct explanation of A b) Both A and R are true but R is not a correct explanation of A c) A is true but R is false d) A is false but R is true,1996
8,”a (Both the statements are correct, and the reason provides a correct explanation)”,”Both the statements are correct. Mangroves are found in the bordering region of tropical and subtropical sea coasts. Mangroves stabilize the shoreline and act as a bulwark against sea erosion, which makes it a specialized forest ecosystem.”
9,Diamond ring is a phenomenon observed:,a) at the start of a total solar eclipse b) at the end of a total solar eclipse c) only along the peripheral regions of the totality trail d) only in the central regions of the totality trail,1996
9,c,”Diamond ring is observed during a solar eclipse only along the peripheral regions of the totality trail.”
10,Which one of the following factors is responsible for the change in the regular direction of the ocean currents in the Indian Ocean?,a) Indian Ocean is half an ocean b) Indian Ocean has monsoon drift c) Indian Ocean is a land-locked ocean d) Indian Ocean has greater variation in salinity,1997
10,b,”Due to the monsoon drift of the Indian Ocean, its regular direction of the ocean currents changes twice a year.”
11,Daily weather map showing isobars is an example of:,a) Choropleth map b) Isopleth map c) Chorochromatic map d) Choroschematic map,1997
11,b,”A daily weather map showing isobars is an example of an isopleth map. Isopleth maps show an imaginary surface by means of lines joining points of equal values.”
12,The group of small pieces of rock revolving round the sun between the orbits of Mars and Jupiter are called:,a) meteors b) comets c) meteorites d) asteroids,1997
12,d,”Asteroids are a group of small pieces of rock revolving around the Sun between the orbits of Mars and Jupiter. They are approximately 40,000 in number.”
13,If the earth’s direction of rotation is reversed, what should be the IST when it is noon at the International Date Line?,a) 06.30 hrs b) 05.30 hrs c) 18.30 hrs d) 17.30 hrs,1997
13,a,”The Earth rotates on its axis from west to east direction. If the direction of rotation of the Earth is reversed, i.e., the Earth starts to rotate from east to west direction, then at 12 o’clock noon at the International Date Time (180°), Indian Standard Time, which is at a distance of 97½° from the International Date Time (180° longitude), will be 18:30 hours.”
14,Which one of the following stars is nearest to the Earth?,a) Polaris b) Alpha Centauri c) Sun d) Sirius,1997
14,c,”Sun is the star nearest to the earth. It is 150 million kilometers away from earth. Sun has temperatures of over 15 million ºC.”
15,Which one of the following conditions is most relevant for the presence of life on Mars?,a) Atmospheric composition b) Thermal conditions c) Occurrence of ice caps and frozen water d) Occurrence of ozone,1997
15,c,”Mars is the only planet with similar daytime temperatures and an atmosphere similar to Earth. The most relevant condition for the presence of life on Mars is the occurrence of ice caps and frozen water.”
16,Consider the map given below: World climate types Of the four shaded areas in the map, which is characterised by hot dry summers, mild and moist winters and seasonal reversal of winds.,(a) 1 (b) 2 (c) 3 (d) 4,1997
16,a,”In the given world map, ‘1’ refers to hot, dry summers, mild and moist winters in California (U.S.A).”
17,Consider the following statements regarding asteroids: 1. Asteroids are rocky debris of varying size orbiting the sun 2. Most of the asteroids are small but some have diameter as large and 1000 km 3. The orbit of asteroids lies between the orbits of Jupiter and Saturn Of these statements: ,(a) 1, 2 and 3 are correct (b) 2 and 3 are correct (c) 1 and 2 are correct (d) 1 and 3 are correct,1998
17,c,”Asteroids are a group of small pieces of rocky debris of different sizes. Some asteroids are small, and some even have a diameter of 1000 km. The asteroids revolve between Mars and Jupiter.”
18,Match the rivers labelled A, B, C and D on the given map with their names given in the list and select the correct answer using the codes given below the lists: A B C D 1. St. Lawrence 2. Orinoco 3. Mackenzie 4. Amazon 5. Yukon List-I List-II Codes: ,(a) A-4; B-3; C-2; D-1 (b) A-5; B-3; C-1; D-2 (c) A-5; B-4; C-1; D-3 (d) A-3; B-1; C-4; D-2,1998
18,b,”In the given diagram of North America and South America: ‘a’ marked river is Yukon, ‘b’ marked river is Mackenzie, ‘c’ marked river is St. Lawrence, ‘d’ marked river is Orinoco.”Certainly! Here are the locations of the rivers you provided:
- St. Lawrence River: The St. Lawrence River is located in North America, flowing in a northeastward direction from Lake Ontario, forming part of the international boundary between Ontario, Canada, and New York State, United States, before emptying into the Gulf of St. Lawrence, which leads into the Atlantic Ocean.
- Orinoco River: The Orinoco River is located in South America, primarily in Venezuela, with a portion of its basin extending into Colombia. It flows in a northwesterly direction, draining into the Atlantic Ocean.
- Mackenzie River: The Mackenzie River is located in Canada, flowing through the Northwest Territories. It is the longest river system in Canada, and it drains into the Beaufort Sea in the Arctic Ocean.
- Amazon River: The Amazon River is located in South America, flowing primarily through Brazil, with smaller portions extending into Peru, Colombia, and several other countries. It is the largest river in the world by discharge volume and drains into the Atlantic Ocean.
- Yukon River: The Yukon River is located in North America, flowing through Canada’s Yukon territory and the U.S. state of Alaska. It flows northwestwardly, eventually emptying into the Bering Sea.
These rivers are significant waterways in their respective regions, playing crucial roles in the ecosystems, economies, and cultures of the areas through which they flow.
19,The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is: ,(a) Troposphere, Stratosphere, Ionosphere, Mesosphere (b) Stratosphere, Troposphere, Ionosphere, Mesosphere (c) Troposphere, Stratosphere, Mesosphere, Ionosphere (d) Stratosphere, Troposphere, Mesosphere, Ionosphere,1998
19,c,”The correct sequence of different layers of the atmosphere from the surface of Earth is Troposphere, Stratosphere, Mesosphere, and Ionosphere. Troposphere extends up to 8 km from the Earth’s surface, but at the equator, it is 16–18 km. Stratosphere extends above the Troposphere 18–50 km. Mesosphere extends up to 80 km, and above the Mesosphere, the Ionosphere is present, which extends up to 400 km.”
20,Estuaries possess distinct blooms of excessive growth of a pigmented dinoflagellates. These blooms are called ,(a) red tides (b) sea tides (c) black tides (d) sea flowers,1998
20,a,”Red tides are a special type of blooms found at estuaries. These blooms are pigmented dinoflagellates. These single-celled organisms are able to swim short distances. When the algae are present in high concentration, the water appears purple or pink in color.”
21,Consider the following climatic conditions (northern hemisphere) : Temp. Rainfall °C cm. J 3.9 4.7 F 4.4 5.7 M 8.3 8.2 A 14.4 9.2 M 20.0 9.2 J 23.3 17.7 J 27.8 14.5 A 27.8 14.0 S 22.3 12.7 O 18.3 7.0 N 12.2 5.0 D 6.7 3.5 These are most likely to be found in the natural regions of: ,(a) China type (b) equatorial type (c) hot desert type (d) monsoon type,1998
21,a,”The climatic conditions given in the table denote the climatic condition of China type climate.”
22,Match List-I with List-II and select the correct answer by using the codes given below the lists: List-I List-II (Special characteristic) (Name of planet)
A. Smallest planet 1. Mercury of the solar system
B. Largest planet of 2. Venus the solar system
C. Planet second from the 3. Jupiter Sun in the solar system
D. Planet nearest to the Sun 4. Pluto
5. Saturn Codes : ,(a) A-2; B-3; C-5; D-1 (b) A-3; B-5; C-1; D-2 (c) A-4; B-1; C-2; D-3 (d) A-4; B-3; C-2; D-1,1998
22,d,”The smallest planet of the solar system is Pluto. The largest planet of the solar system is Jupiter. The planet second from the Sun in the solar system is Venus. The planet nearest to the Sun is Mercury.”
23,Physical regions marked as 1, 2, 3, and 4 on the given map are respectively: 1 2 3 4 ,(a) Andes, Brazilian Shield, Guyana Highlands and Amazon Basin (b) Andes, Guyana Highlands, Brazilian Shield and Amazon Basin (c) Amazon Basin, Guyana Highlands, Brazilians Shield and Andes (d) Guyana Highlands, Brazilian Shield Andes and Amazon Basin,1999
23,a,”In the given figure: Andes is marked as ‘1’, located on the western coast of South America. Brazilian shield is marked as ‘2’, located at the eastern part of South America. The shield extends over 8.5 million square. Guyana highland is marked as ‘3’, a plateau and low mountain region of South America located north of the Amazon river and south of the Orinoco river. Amazon basin is marked as ‘4’, the tropical rainforest in the world. The Amazon river drains more than half of Brazil, part of Bolivia, Peru, and Ecuador.”