hydrosphere

Question 1

desalinization

Answer 1

removal of salt from the ocean

Question 2

hydrologic cycle

Answer 2

the movement of water through the hydrosphere

Question 3

headwaters

Answer 3

the first and smallest streams

Question 4

tributary

Answer 4

any smaller stream that flows into a larger stream

Question 5

watershed

Answer 5

a region drained by a river and its tributaries.

Question 6

drainage basin

Answer 6

a region drained by a river and its tributaries.

Question 7

estuaries

Answer 7

a place where a river meets an inlet

Question 8

wetlands

Answer 8

an area that is covered in water for at least part of the year

Question 9

humus

Answer 9

a mix of soil and animal and plant products that have been broken down

Question 10

leaching

Answer 10

downward movement of humus

Question 11

contour plowing

Answer 11

plowing across a hill rather than up it

Question 12

soil exhaustion

Answer 12

when soil becomes nearly useless for farming

Question 13

crop rotation

Answer 13

planting different crops in alternating years

Question 14

irrigation

Answer 14

water being artificially supplied to the land

Question 15

soil salizination

Answer 15

salt buildup on soil

Question 16

deforestation

Answer 16

the destruction or loss of soil

Question 17

reforestation

Answer 17

the replanting of forrests

Question 18

fossil fuels

Answer 18

coal, natural gas, and petroleum