click below
click below
Normal Size Small Size show me how
Waves and the Earth
GCSE Core P1 Topic 4
Question | Answer |
---|---|
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 |