A rock dredge is dragged along the seafloor behind a research ship to collect sediment and rock samples directly from the ocean floor. Sonar emits a sound signal from a ship and records the signal after it bounces off the seafloor and underlying layers, providing a picture of the seafloor structure and topography. Magnetic stripes on the seafloor rapidly led to the development of the sea floor spreading hypothesis and theory of plate tectonics. Remote sensing techniques are discussed to better understand the seafloor and search for treasure.

1. 

2. 
Okay. okay I
will listen to
you coz I
want to find
the treasure !

3. 

4. 
✈SAMPLING
Several devices collect sediment and rock directly
from the ocean floor. A is an open
mouthed steel net dragged along the sea floor
behind a research ship, The dredge breaks rocks
from a submarine outcrops and hauls them to
surface .
This is a rock
dredge right?
Yeah! Very good!

5. 
can we use
Sampling in finding
The treasure?
Let me first finish my discussion,
Understoood!
Ok!

6. 
.
It is include
to the
technique in
sampling.

7. 
Oil
Exploration,
I like
exploration
Me too, so lets
explore better.
Lets go to the
next technique

8. 
It will help me
better, clue and
guide if where
are the treasure.

9. 

10. 
AWESOME!
TECHNOLOGIES USED
IN REMOTE SENSING!!

11. Commonly used to Map the Sea Floor
☀it emits a sound signal from a research ship and
then records the signal after it bounce off to the
sea.
I think
dolphins have
sonar…

12. Works in the same way but uses a higher energy signal
that penetrates and reflects from layers in sediment and
rock. This gives a picture of the layering and structure of
the oceanic crust as well as the sea floor topography.

13. 
.

14. 
MAGNETIC STRIPES
MAGNETIC
STRIPES???
These are the
reasons why
ocean floor have
different features
and too wide.

15. 
The discovery of magnetic stripes
rapidly led to the development of the
sea floor spreading hypothesis and of
the theory of the plate tectonics.

16. 
instruments have recently been used to
measure subtle swells and depressions
on the sea floor.
PAG-ASA and
PHIVOLCS use
satellite base
microwave
radar.

17. 
Wanna
know
this!

18.  Thanks for
sharing those
info!!.bye bye.
I think I need to
go before my
competitors got
the treasure.
Huh? You
will going to
leave me
again.
We are now
finish in the
techniques in
studying the
seafloor

19. 

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21. 
LECTURE IN SEA FLOOR
SPREADING
FOCUS IN THIS VIDEO WELL

22. 

23. 
RAPID AND SLOW SEA FLOOR SPREADING
Spreading
rates also
cause
flooding.

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