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Waves and the Earth

GCSE Core P1 Topic 4

Frequency Below 20Hz? Ultra or Infra Infrasound
Frequency Above 20 000 Hz? Ultra or Infra Ultrasound
Foetal Scanning? Ultra or Infra Ultrasound
What is Frequency? Number of complete waves that pass a point in 1 second.
What is frequency is measured in? Hertz Hz
Two Uses of Infrasound? Volcano eruption, animal communication, animal locations, meteorite detection
Two Uses of Infrasound? Volcano eruption, animal communication, animal locations meteorite detection
What is the range humans can hear? 20Hz to 20 000 Hz
Two Uses of Ultrasound? Foetal Scanning, sonar, animal Communication.
What is Sonar? Ultrasound, that allow bats to detect obstacles and boat to measure the depth of the sea.
How do you calculate Wave Speed? Wave speed = Distance / Time
Name 2 parts of the earths structure. Crust, Mantle, Inner Core, Outer Core
What type of waves to earthquakes produce? Seismic Waves
What causes earthquakes? Tectonic plates plates moving and hitting each other
What are the two types of Seismic Waves? S and P
Which direction to P waves move rocks? Push and pull the rock/up and down
Are P waves Longitudinal or Transverse? Longitudinal
Are S waves Longitudinal or Transverse? Transverse
Which wave moves faster S or P? P
Which direction to S waves move rocks? side to side
Which waves arrive first S or P? P
Which Waves can only travel through Solids, S or P? S
Light can bounce off some materials? Reflection or Reflection Reflection
Changes direction when it goes from one material to another? Reflection or Reflection Refraction
Created by: edwak002