Please select a subject first
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Assertion (A): The ocean/seawater does not contains calcium in great quantities.
Reason (R): Many of the aquatic animals with shells use the dissolved calcium in the seawater to build their protective shells.
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Write a short note on the movement of the ocean water.
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What is called continental rise?
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How is the energy of the falling wave water used?
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When was the National Institute oceanography established? What do they do?
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Give reason for the following.
The earth is called the Blue Planet.
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Give reason for the following.
Oceans are the lifelines of Earth and Mankind.
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Give reason for the following.
Most of the Creek area get submerged.
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“71% of the earth is covered by water but very little can be used by humans. Why?
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Why is the salinity at the equator less even though it experiences high temperature?
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“Though Caspian Sea is enclosed its salinity is just 14 to 17 parts per thousand. Why is it so?
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In Temperate Grass Lands Biome higher precipitation leads to ______ grass.
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In Temperate Grassland Biomes lower precipitation leads to ______ grass.
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Tundra Biomes are also called ______.
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Lakes, ponds, rivers, streams, wetlands together known as ______ biomes.
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In aquatic ecosystem, there is abundant water with limited ______ supply.
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Terrestrial animals use only 1 – 2% of energy to obtain ______.
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