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11
Where are most or the Earth's active volcanoes concentrated at present?
Discuss
Answer & Solution
Answer: Option C
Solution:
In Pacific Ocean, the Earth's active volcanoes concentrated at present. Volcanic eruptions occur only in certain places and do not occur randomly. This is because the Earth's crust is broken into a series of slabs known as tectonic plates. Most volcanoes are found along a belt, called the "Ring of Fire" that encircles the Pacific Ocean.
12
Of the total water on the Earth, fresh water reserve a constitute approximately
Discuss
Answer & Solution
Answer: Option B
Solution:
Of the total water on the Earth, 3% fresh water reserve a constitute approximately. Over 68% of the fresh water on Earth is found in icecaps and glaciers, and just over 30% is found in ground water. Only about 0.3% of our fresh water is found in the surface water of lakes, rivers, and swamps.
13
What percentage or all water available on the Earth is contained in the oceans?
Discuss
Answer & Solution
Answer: Option D
Solution:
About 97% of the Earth's water can be found in our oceans. Of the tiny percentage that's not in the ocean, about two percent is frozen up in glaciers and ice caps. Less than one percent of all the water on Earth is fresh. A tiny fraction of water exists as water vapor in our atmosphere.
14
"Great Barrier Reef, the world's largest Coral reef is located in
Discuss
Answer & Solution
Answer: Option B
Solution:
The reef is located off the coast of Queensland, Australia, in the Coral Sea. Stretching for 1,429 miles over an area of approximately 133,000 square miles , the Great Barrier Reef is the largest coral reef system in the world.
15
Which is the smallest Country (in population)?
Discuss
Answer & Solution
Answer: Option A
Solution:
With the population of around 500, European country Vatican City has smallest population in the world. Vatican City is the smallest country in the world, measuring just 0.2 square miles, almost 120 times smaller than the island of Manhattan. Situated on the western bank of the Tiber River, Vatican City's 2-mile border is landlocked by Italy.
16
Which soil is sticky when wet and develops cracks when dry
Discuss
Answer & Solution
Answer: Option B
Solution:
Black soil is sticky when wet and develops cracks when dry. The black soils are generally clayey, deep and impermeable. They swell and become sticky when wet and shrink when dried. So, during the dry season, these soil develop wide cracks.
17
Which among the following forms of precipitation is different from the rest?
Discuss
Answer & Solution
Answer: Option D
Solution:
Hail forms of precipitation is different from the rest. Hail is a form of solid precipitation. The formation of hail usually requires cumulonimbus or other convective clouds with strong updrafts, it often accompanies thunderstorms.
18
Coastline formed by a drowned river mouth is a
Discuss
Answer & Solution
Answer: Option C
Solution:
Coastline formed by a drowned river mouth is a Ria. A ria is a coastal inlet formed by the partial submergence of an unglaciated river valley. It is a drowned river valley that remains open to the sea.
19
Commercial sources of energy purely consist of
Discuss
Answer & Solution
Answer: Option A
Solution:
Commercial energy is energy which is available to the users at some price. Commercial sources of energy purely consist of power, coal, oil, gas, hydro-electricity and uranium.
20
An estuary is a place where
Discuss
Answer & Solution
Answer: Option D
Solution:
An estuary is a place where Fresh and salt water mix near the mouth of a river. Estuaries are areas of transition where fresh water and salt water meet. An estuary is a partially enclosed coastal embayment (or bay) where fresh water and salt water from the ocean mix. They occur where rivers and Great Lakes water mix in shallow wetlands located near the mouth of a river.