Infrared & seismic waves (Edexcel GCSE Physics Combined Science): Flashcards
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Infrasound frequency range
Infrasound frequency range
Below 20 Hz
Animals using infrasound to communicate
Animals using infrasound to communicate
Elephants and whales
Natural events producing infrasound
Natural events producing infrasound
Volcanoes, avalanches, and earthquakes
Events that produce seismic waves
Events that produce seismic waves
Earthquakes or large explosions
P-waves wave type
P-waves wave type
Longitudinal waves
P-waves speed (vs S-waves)
P-waves speed (vs S-waves)
Faster
Materials P-waves travel through
Materials P-waves travel through
Solids and liquids
Can P-waves travel through Earth's core?
Can P-waves travel through Earth's core?
Yes
S-waves wave type
S-waves wave type
Transverse waves
S-waves speed (vs P-waves)
S-waves speed (vs P-waves)
Slower
Materials S-waves travel through
Materials S-waves travel through
Only solids (not liquids)
Can S-waves travel through Earth's core?
Can S-waves travel through Earth's core?
No
Instrument detecting seismic waves
Instrument detecting seismic waves
Seismometers
Seismic wave behaviour at density boundaries
Seismic wave behaviour at density boundaries
Absorbed and refracted (bent)
Earth's outer core state (from seismic evidence)
Earth's outer core state (from seismic evidence)
Liquid (P-waves pass through, S-waves cannot)