Sci-Five | The Hindu Science Quiz: On rain

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. Which of the following names is used to refer to thunderclouds?

Cumulus

Cumulonimbus clouds are the menacing, towering clouds that produce hail, thunder and lightning.

Nimbostratus

Cumulonimbus clouds are the menacing, towering clouds that produce hail, thunder and lightning.

Cumulonimbus

Cumulonimbus clouds are the menacing, towering clouds that produce hail, thunder and lightning.

Cirrus

Cumulonimbus clouds are the menacing, towering clouds that produce hail, thunder and lightning.

. Thunder clouds can sport enormous electric potential. The Ooty Muon sensing experiment GRAPES-3 measured what was the highest value of the potential of a thundercloud. What was the value they measured?

1.3 volts

at 1.3 gigavolt, that was a massive thundercloud that GRAPES-3 spotted. It had ten times higher potential than had been measured earlier in a cloud.

1.3 kilovolt

at 1.3 gigavolt, that was a massive thundercloud that GRAPES-3 spotted. It had ten times higher potential than had been measured earlier in a cloud.

1.3 megavolt

at 1.3 gigavolt, that was a massive thundercloud that GRAPES-3 spotted. It had ten times higher potential than had been measured earlier in a cloud.

1.3 gigavolt

at 1.3 gigavolt, that was a massive thundercloud that GRAPES-3 spotted. It had ten times higher potential than had been measured earlier in a cloud.

. Where can you see the Madden-Julian oscillation?

Indian Ocean

Indian Ocean. The MJO is an eastward moving pulse of rainfall and clouds that is born in the Indian Ocean and moves eastward along the tropics to decay at the date line, but continue as a dry wave around the world. It typically recurs every 30-60 days.

North Atlantic Ocean off Portugal

Indian Ocean. The MJO is an eastward moving pulse of rainfall and clouds that is born in the Indian Ocean and moves eastward along the tropics to decay at the date line, but continue as a dry wave around the world. It typically recurs every 30-60 days.

Norwegian Sea

Indian Ocean. The MJO is an eastward moving pulse of rainfall and clouds that is born in the Indian Ocean and moves eastward along the tropics to decay at the date line, but continue as a dry wave around the world. It typically recurs every 30-60 days.

North Pacific Ocean off Canada

Indian Ocean. The MJO is an eastward moving pulse of rainfall and clouds that is born in the Indian Ocean and moves eastward along the tropics to decay at the date line, but continue as a dry wave around the world. It typically recurs every 30-60 days.

. Which of the following climate patterns is associated with unusual warming of surface waters of the tropical southern Pacific ocean?

El-Nino

The El-Nino is responsible for the warming of surface waters of South Pacific ocean near the tropics. It is part of a larger phenomenon called El-Nino Southern Oscillation.

La Nina

The El-Nino is responsible for the warming of surface waters of South Pacific ocean near the tropics. It is part of a larger phenomenon called El-Nino Southern Oscillation.

Hadley wave

The El-Nino is responsible for the warming of surface waters of South Pacific ocean near the tropics. It is part of a larger phenomenon called El-Nino Southern Oscillation.

None of the above

The El-Nino is responsible for the warming of surface waters of South Pacific ocean near the tropics. It is part of a larger phenomenon called El-Nino Southern Oscillation.

. Why is the Madden-Julian Oscillation called an oscillation?

Its temperature rises and falls

It recurs with an approximate period of 30-60 days.

It is a wave form

It recurs with an approximate period of 30-60 days.

It recurs somewhat periodically

It recurs with an approximate period of 30-60 days.

It moves like a swing

It recurs with an approximate period of 30-60 days.