World Water Day Quiz
How many known sources of fresh water are there?
Who uses more water Developed country's household usage or developing?
What percentage of the water on earth is fresh water?
Which one of the two uses most amount of water in the developed countries?
When is world water day celebrated every year?
World Water Day Quiz
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Underwater vehicles Quiz
What is a submarine ?
Are all underwater vehicles called submarine?
Which of these is also a submersible?
Which submersible is certified to go any depth in the ocean (full ocean depth) at present?
What is the name of the submersible that found RMS Titanic ship ?
Underwater vehicles Quiz
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