Flashcards

Ultrasound, infrasound and seismic waves: Physics Topic 4

Sara Olukoga English 8 cards

Cards in this deck (8)

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.,