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Class 7 Science Competitive Exam: Certification Test 68

All Around Sounds Quiz App Download & PDF e-Book - 68

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MCQ: 68

For communication astronauts use radio because

  1. sound travels at very high speed in vacuum
  2. sound does not travel in vacuum
  3. vacuum repels sounds
  4. sound energy turns into light in vacuum
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All Around Sounds Competitive Exam: Class 7 Science App & eBook Quiz

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The App: All Around Sounds Quiz App to study All Around Sounds Notes, 7th Grade Science Quiz App, and 8th Grade Science Quiz App. The "7th Grade Science Quiz" App to Free Download All Around Sounds Apps (Android & iOS) for elementary school graduation certificate. Download App Store & Play Store study Apps with all functionalities to learn online classes courses.

All Around Sounds Quiz App (iOS & Android)

All Around Sounds Quiz App

7th Grade Science Quiz App (Android & iOS)

7th Grade Science Quiz App

8th Grade Science Quiz App (Android & iOS)

8th Grade Science Quiz App

6th Grade Science Quiz App (Android & iOS)

6th Grade Science Quiz App

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