Soil (final)

Question 1

Soil erosion control measures

Answer 1

In zero till
Shelterbelts
Control structures

Question 2

Soil erosion

Answer 2

It is estimated that topsoil is eroding faster than it forms on more than one third of the world’s croplands

Question 3

Cover crops

Answer 3

Any crop grown primarily to provide ground cover to improve soil properties, rather than providing a harvestable yield. It is normally grown in the time period between regular crops, although it may be seeded in the preceding crop

Question 4

Hydrologic cycle

Answer 4

Continuous circulation of water within the earth’s hydrosphere

Question 5

Groundwater

Answer 5

GW is an important water source

Question 6

Cone of depression

Answer 6

When a substantial amount of water is withdrawn from a well, the water table around the well is lowered in a conical in shape

Question 7

Geological work of Groundwater

Answer 7

GW typically contains carbonic acid
Water “picks up; carbonic acid as rain passes the air and as the GW percolates through zones of decaying plant material
When GW contacts limestone the carbonic acid reacts with calcite and forms calcium bicarbonate

Question 8

Caverns

Answer 8

Dissolving process slowly creates cavities and gradually enlarges them into caverns

Question 9

When water table is lowered, cavities are filled with air and the following can form

Answer 9

Stalactites
Stalagmites
Columns

Question 10

What are the 10 longest rivers in the world?

Answer 10

Nile
Amazon
Yangtze
Mississippi
Yenisel
Yellow River
Ob
Rio de la Plata
Congo
Amur

Question 11

What are the 10 longest rivers in Canada?

Answer 11

Mackenzie
Yukon
Saint Lawrence
Nelson
Slave
Columbia
Saskatchewan
Peace
Churchill
South Saskatchewan