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Geography > Hydrosphere > Flashcards

Hydrosphere Flashcards

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1
Q

Define hydrosphere

A

combined mass of water-oceans rivers streams lakes-atmosphere and underground

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2
Q

Main sources of water on the earth

A

ocean water
water on land
underground water
water in atmosphere

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3
Q

percentage of ocean water

A

97

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4
Q

percentage of water in polar ice caps

A

2.3

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5
Q

percentage of water as groundwater

A

0.66

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6
Q

percentage of water in river lakes and streams

A

0.03

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7
Q

2 sources of water on land

A

precipitation and seepage from underground

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8
Q

define underground water

A

water collected under the surface of the land

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9
Q

underground water stream that is saturated with water and transmits water easily

A

aquifer

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10
Q

____________ gives rise to humidity

A

water vapours

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11
Q

Define hydrological cycle

A

circulation of water-atmosphere hydrosphere lithosphere

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12
Q

Define waves

A

oscillatory movements in water-alternate rise and fall of the sea surface

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13
Q

waves are mainly produced by _________

A

winds on the surface of the oceans

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14
Q

Define tide

A

rise of sea water-movement towards the coast

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15
Q

Define high tide water

A

rise of sea water-movement towards the coast-resultant high water level

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16
Q

Define ebb

A

fall of sea water-movement towards the sea

17
Q

Define low tide water

A

fall of sea water-movement towards the sea-resultant low water level

18
Q

high tide water - low tide water

A

tide range

19
Q

farthest distance between moon and earth

A

apogee

20
Q

nearest distance between moon and earth

A

perigee

21
Q

Define high tide

A

sun moon earth-same line

22
Q

Define low tide

A

sun moon-right angles with respect to earth

23
Q

time interval between two tides

A

12hr 26min

Geography (1 decks)

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