universe & solar system section 10 Practice Questions Answers Test with Solutions & More Shortcuts
Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]
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Question : 16 [UPPCS (Pre) 2000]
Consider the following statements and select the correct answer from the code given below.
- The Northern end of the Earth’s axis is called North Pole.
- 45º latitude is half of the length of the equator.
- Earth’s axis are parallel.
- The Earth’s speed of revolution is faster in aphelion position.
a) 3 and 4
b) 1 and 3
c) 2 and 3
d) 1 and 2
Answer »Answer: (b)
Question : 19
Which of the following elements exhibit the following properties?
- It is the third most abundant element in the earth crust.
- It exists in a stable combination with other materials mainly silicates and oxides.
- It has high strength-to-weight ratio.
a) Aluminium
b) Calcium
c) Iron
d) Magnesium
Answer »Answer: (a)
The properties of aluminium include:
- low density and therefore low weight,
- high strength,
- superior malleability,
- easy machining,
- excellent corrosion resistance and
- good thermal and electrical conductivity are amongst aluminium’s most important properties.
Aluminium is also very easy to recycle.
Question : 20
The tail of a comet is directed away from the sun because
a) The radiation emitted by the sun exerts a radial pressure on the comet throwing its tail away from the Sun.
b) The tail of the comet always exists in the same orientation.
c) the comet rotates, the lighter mass of the comet is attracted by some star situated in the direction of its tail.
d) the comet rotates around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alone.
Answer »Answer: (d)
The tail of the comet is always away from the Sun because the comet rotates around the Sun, the lighter mass of the comet is pushed away due to the centrifugal force alone. The tail of a comet is made up of gas and tiny particles that are carried away from the sun by the solar wind.
Comets are formed mostly from ice and dust, and their tails only form when they are close enough to be melted by the heat from the sun. As the nucleus of a comet begins to melt, it forms a cloud of gas and small particles known as the coma.
When comets travel close enough into the center of our solar system, pressure from sunlight causes the coma to form a tail that stretches away from the sun.
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Universe, solar system and Astronomy Shortcuts »
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indian geography mcq CATEGORIES
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» Nature & Scope of Geography
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» Universe, solar system and Astronomy
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» Geomorphology & Earth landforms
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» Atmosphere & Climatology
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» Hydrosphere & Oceanography
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» Pedology or Soil & Agriculture
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» Ecology & Bio geography
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» World Physical Geography
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» World Human Geography (Population)
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» World Economic Geography (Industry, Trade, Transportation & Agriculture)
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» World Country, Capital, Area, Currency, Parliament, Religion, New & old name of country
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» Physiography & Geomorphology of India
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» Indian Drainage, Irrigation and Rivers & River Projects
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» Indian Climate
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» Ecology, Environment, Forest, Naturals vegetations of India & National Park of India
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» Indian Agriculture & Animal Husbandry
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» Minerals & Energy Resources of India
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» Industries & Trade in India
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» Transportation & Ports System of India
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