Grade 10 Science - Seismic Waves

1. EARTH’S BEAT
Chapter 3
Prepared by:
Bb. Jasmine Nikki M. Versoza

2. TOPIC OUTLINE
Chapter 3: Earth’s Beat
L5. Earthquake and Volcanoes
L6. Earthquake Strength and Location

3. LESSON 5:
EARTHQUAKE AND
VOLCANOES

4. EARTHQUAKES
▪ Proofs of the activities happening
within the interior of the Earth.
▪ Violent shaking of earth’s surface
by the movement of the earth
crust.

5. SEISMIC WAVES
An elastic wave in the earth
produced by an earthquake or
other means

6. SEISMIC WAVES
▪ Body waves
• Primary wave
• Secondary wave
▪ Surface wave
• Rayleigh wave
• Love wave

8. PRIMARY WAVE
▪ Fastest kind of seismic
wave
▪ Can move through solid
rocks and fluids
▪ Longitudinal/Compression
al wave

9. ▪ Second wave felt
during an earthquake
▪ Can only move
through solid rock
▪ Transverse wave
SECONDARY WAVE

10. ▪ named after John
Willian Strutt
▪ rolls along the ground
▪ Moves the ground up
and down and side-to-
side
RAYLEIGH WAVE

11. ▪ named after A.E.H.
Love
▪ Fastest surface wave
▪ Moves the ground from
side-to-side
LOVE WAVE

12. CIRCUM-PACIFIC BELT
▪ A long horseshoe-shaped
seismic belt
▪ A chain of active volcanoes and
tectonic plate boundaries

13. SEISMIC BELT
A narrow, geographical area
wherein a lot of earthquakes
occur.

15. EARTHQUAKES
TYPES:
▪ Tectonic Earthquakes
▪ Volcanic Earthquakes

16. TECTONIC EARTHQUAKES
▪ Due to the collision of two
tectonic plates causing
friction, heat, and movement
of the earth’s crust

17. VOLCANIC EARTHQUAKES
▪ Occur when a volcano
produces acidic lava which
dries quickly.

18. LESSON 6:
EARTHQUAKE STRENGTH
AND LOCATION

19. SEISMOGRAPH
▪ An instrument used to record
data about an earthquake.
▪ This instrument has a great
inertia

21. COLUMN
▪ Moves when seismic waves are
detected
WIRE
▪ Moves when seismic waves are
detected
▪ Holds the weight/mass

22. WEIGHT/MASS
▪ Does not move to accurately record
the seismic waves
PEN
▪ Records the seismic waves

23. ROTATING DRUM
▪ Where the seismic waves are
recorded

26. SEISMOGRAM
The output done by the
seismograph.

27. INTENSITY SCALE
The Philippine Institute of Volcanology and
Seismology currently uses its own system,
called PHIVOLCS Earthquake Intensity
Scale (PEIS)

28. SCILAB NO. 1-5
Seismometer Simulation
In this activity, you will be able to:
1. simulate how a seismograph
works.