6. Grade 9

Homework Grade 9


제목Science Homework (due Wednesday December 10)2025-12-08 12:56
작성자 Level 8

Please review and study Chapter 18. The test is on Wednesday December 10.

It is important to know the parts of the ear and function since there will be short answer questions about them.

Writing Question (essay)

  • Explain why the statement “The speed of sound in air is 343 m/s” is not completely accurate. What would cause the speed of sound in air to change?
  • Describe how the human body produces vocal sounds.
  • Describe how God has designed various animals to use echolocation. How have humans imitated this design in their own technology?

Additional Questions:

  • Why is the statement “Air is necessary to transmit sound” not fully accurate?
  • How is loudness different from intensity?
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