Geography · Science General

Rocks and Earth Materials

1,176 Questions

Study geographical questions centered around rocks, minerals, and earth materials. The focus is on the formation and identification of igneous, sedimentary, and metamorphic rocks. These earth science topics are commonly tested in civil services and state level examinations.

Igneous rocksSedimentary rocksMetamorphic processEarth materialsGeomorphic symbols

Rocks and Earth Materials Questions

Multiple choice

What is a meteoroid?

  1. The small pieces of rocks, which move around the Sun.

  2. Parts of a planet, which exploded many years back.

  3. Huge pieces of rock, which move around the Sun in fixed paths.

  4. The huge pieces of rocks moving around the planets.

  5. An icy small object, which when passing close to the Sun, heats up and begins to outgas.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option.

Multiple choice

Which process causes breaking of rocks?

  1. Weathering

  2. Raining

  3. Thundering

  4. Grinding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Weathering is the natural process of breakdown and alteration of rocks and minerals at or near the Earth's surface through physical, chemical, and biological processes. This causes rocks to break into smaller particles over time.

Multiple choice

Which of the following type of rocks has the smallest size particles?

  1. Clay

  2. Silt

  3. Sand

  4. Gravel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Clay particles are the finest among soil particle sizes, typically less than 0.002mm in diameter. Silt particles are larger (0.002-0.05mm), sand even larger (0.05-2mm), and gravel is the coarsest (>2mm). The smaller the particle size, the greater the surface area and water-holding capacity.

Multiple choice

Which of the following statements is/are true?

  1. 80% of the geothermal energy of the Earth's crust originates from radioactive decay of minerals.
  2. The US is the largest producer of geothermal energy.

  1. Only 1

  2. Only 2

  3. Both of these

  4. Neither of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. The geothermal energy of the Earth's crust originates from the original formation of the planet (20%) and from radioactive decay of minerals (80%). At the core of the Earth, most of the thermal energy is created by radioactive decay.

Statement 2 is correct: The United States led the world in geothermal electricity production with 3086 megawatts (MW) of installed capacity from 77 power plants.

Multiple choice

What do you mean by meteorites?

  1. Small meteors are known as meteorites.

  2. Meteors that reach the surface of the earth before evaporating completely are called meteorites.

  3. Meteors that crash into the surface of the earth at night time only are called meteorites.

  4. Meteors that reach the surface of the earth after cooling down in the cold upper reaches of the atmosphere are called meteorites.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meteors that reach the surface of Earth before evaporating completely are known as meteorites. 

Multiple choice

Which is TRUE about sedimentary rocks?

  1. limestone is made of nitrate minerals

  2. limestone readily fizzes with acid and limestone is made of carbonate minerals

  3. the red of sandstone is usually due to calcium compounds

  4. hard wearing, not easily weathered, even by acid rain

  5. usually non-porous
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

yes, it is true about limestone which is a sedimentary rock.

Multiple choice

Which rock description is most likely to be that of the basalt?

  1. usually orange-red, porous, sometimes fossils

  2. larger crystals, many colours, close grained (non-porous), no fossils

  3. dark coloured, close grained, small crystals, no fossils

  4. usually white-grey-yellow, often fossils, porous

  5. usually white,porous,sometimes fossils
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

yes,It is basalt,which is a igneous rock.

Multiple choice

In general, rocks can best be described as a

  1. mixtures of compounds

  2. pure element

  3. pure compound

  4. mixtures of metals

  5. mixture of acids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rocks are formed by the deposition of many inorganic minerals. So, it is a mixture of compounds.

Multiple choice

Put all the above giving sequence in a correct order?

Temperature changes can weather rocks.
Following are the some steps of weathering of rocks.
(1) rock expands
(2) rock cools down
(3) rock layers crack
(4) rock heats up
(5) rock contracts

  1. (5) (3) (1) (2) (4)

  2. (3) (2) (1) (4) (5)

  3. (1) (2) (4) (5) (3)

  4. (4) (1) (3) (2) (5)

  5. (2) (3) (4) (1) (5)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

first rock heats up, then expand due to heat, crack, cools down and after cooling contract

Multiple choice

Which of the following sequence most closely describes the process of formation of igneous rocks from metamorphic rocks?

  1. weathering, erosion, transportation, deposition, burial, pressure, cementation

  2. burial, melting, cooling

  3. weathering, erosion, burial, melting, cooling

  4. may involve burial first, heat and/or pressure, recrystallisation without melting

  5. melting, burial, cooling
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

yes, It is the correct sequence of forming igneous rocks from metamorphic rocks.