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Sound Waves
For revision
Question | Answer |
---|---|
What causes sound? | Vibrations |
Where do sound waves travel? | In the air. |
What does sound waves have anything to do with energy? | They carry energy. |
What makes an echoe? | When sound waves hit a surface and bounce back to you. |
What is pitch? | The highnesss or lowness of a sound. |
What is frequency? | The number of times a second a sound wave repeats in a second. |
What is volume? | The loudness or softness of a sound. |
What is amplitude? | How high a note is. |
What is volume measured in? | Decibels |
What causes sounds less than 0 decibels? | Giant explosions or waves in the ocean. |
Why are scientists studying sounds less than 0 decibels? | To predict when a volcano will erupt or when a tsunami is coming. |