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Ultrasound, infrasound and seismic waves: Physics Topic 4
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- 1Physics Topic 4 Spec point 4.1: State what frequency a sound must have to be described as ultrasoundA sound must have a frequency above 200,000 Hz to be classified as ultrasound.
- 2Physics Topic 4 Spec point 4.2: Describe uses of ultrasound.Uses of ultrasound:
-Foetal scanning
-Animals use it communicate
-In submarines and boats - 3Physics Topic 4: Spec point 4.3: Calculate depth or distance from time and velocity of ultrasoundSpeed=distance/time.
That's it. - 4Physics Topic 4: Spec point 4.4: State what frequency a sound must have to be described as infrasound.Below 20 Hz
- 5Physics Topic 4 Spec point 4.5: Describe uses of infrasound.Uses of infrasound:
-Elephants use to detect earthquakes and communicate.
-Microphones
-Volcanic eruptions produce infrrasound. - 6Physics Topic 4 Spec point 4.6: Recall what generates seismic waves.Seismic waves are generated by earthquakes and explosions.
- 7Physics Topic 4 Spec point 4.7: Investigate the unpredictability of Earthquakes, through sliding blocks and weights.Sandpaper experiment.
- 8Physics Topic 4 Spec point 4.8: Explain why scientists find it difficult to predict earthquakes and tsunamis waves.,
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- Fichas sobre Sin título, creado por Sara Olukoga el 24/01/2015.
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