El Nino + Tsunami Question Preview (ID: 5429)


ElNino Upwelling Downwelling Tsunamis Waves. TEACHERS: click here for quick copy question ID numbers.

What causes an El Nino?
a) Warm waters moving eastward due to low tradewinds which blocks upwelling
b) Cold waters moving westward and strong tradewinds which increases downwelling
c) Cold waters moving eastward due to low tradewinds which blocks upwelling
d) Warm waters moving westward and strong tradewinds which increases downwelling

Tsunamis are caused mainly by
a) winds
b) underwater plate movement
c) tides
d) storms

Where do most tsunami's occur?
a) Atlantic Ocean
b) Southern Ocean
c) Pacific Ocean
d) Indian Ocean

How fast can tsunami's travel?
a) 6-12 mph
b) 60-120 mph
c) 40-50 mph
d) 20-30 mph

What instrument can detect a tsunami?
a) Bottom sampler
b) Dart Buoy
c) Dredge
d) Echo-sounder

This occurs when winds blow warm water towards the shore and is less biologically productive?
a) downwelling
b) upwelling
c)
d)

What occurs during La Nina?
a) Tradewinds and upwelling increases
b) Tradewinds decrease and downwelling occurs
c) Tradewinds increase and downwelling occurs
d) Tradewinds and upwelling decreases

In which ocean does El Nino occur?
a) Atlantic
b) Indian
c) Pacific
d) Southern

During normal condtions where does upwelling normally occur in the equatorial Pacific?
a) On the eastern side of the basin
b) On the northern side of the basin
c) On the southern side of the basin
d) On the western side of the basin

What kind of wave is the best for board surfing?
a) plunging
b) spilling
c) surging
d) tsunami

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