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