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?
When is world water day celebrated every year?
How many known sources of fresh water are there?
Who uses more water Developed country's household usage or developing?
World Water Day Quiz
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Underwater vehicles Quiz
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 ?
What is a submarine ?
Are all underwater vehicles called submarine?
Underwater vehicles Quiz
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