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Study Notes

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NotesApr 16, 2021

ভূ-স্থির উপগ্রহ

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NotesApr 16, 2021

আগ্নেয়গিরি (Volcano)

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NotesApr 16, 2021

ভূমিকম্প (Earthquake)

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NotesApr 16, 2021

মেঘ নানা রকমের হয় কেন?

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NotesApr 16, 2021

সমুদ্রের পানি নোনা কেন?

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NotesApr 16, 2021

উপনদী, শাখা নদী ও দো-আব কাকে বলে?

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NotesApr 16, 2021

বনভূমি এলাকায় বৃষ্টিপাত বেশি হয় কেন?

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NotesApr 16, 2021

দিনে দুইবার জোয়ার-ভাটা হয় কেন?

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