4. PERFORMANCE STANDARD
The learners should be able to demonstrate ways to:
• Suggest ways by which he/she can contribute to
government efforts in reducing damage due to
earthquakes, tsunamis and volcanic eruptions.
6. OBJECTIVES
➢ Trace the existence of fossils of plants and animals as evidences
found in the present continents that supports the fitting of drifted
continents
➢ Cite other proofs of continental drift theory
➢ Explain the cause of movement of tectonic plates
➢ Describe how evidences of plate movement were collected
➢ Cite other proofs of plate movement
6
8. 8
a German meteorologist
and geophysicist, once
hypothesized that
continents were once joined
as a single landmass called
PANGAEA
9. 9
Refer to the human,
plant, and animal
remains that have
been preserved
through time like
human or animal
teeth, skull, and
bone fragments.
10. 10
A supercontinent that
existed during the late
paleozoic and early
mesozoic eras. It
assembled from earlier
continental units
approximately 335 million
years ago, and it began to
break apart about 175
million years ago.
11. 11
A theory which suggests
that earth’s crust is made
up of the plates that
interact in various ways,
thus producing
earthquakes, mountains,
volcanoes, and other
geologic features.
13. 13
a German meteorologist and
geophysicist, once hypothesized that
continents were once joined as a single
landmass called PANGAEA
Alfred Wegener
14. 14
States that all the continents
were once one large landmass
that broke apart and where the
pieces moved slowly to their
current locations.
Continental Drift Theory
15. CONTINENTAL DRIFT THEORY
⮚ States that all the
continents were once
one large landmass
that broke apart and
where the pieces
moved slowly to their
current locations.
17. 17
The Eastern coastline
of South America and
western coastline of
Africa look like they
would fit together as a
jigsaw puzzle
EVIDENCES OF CONTINENTAL DRIFT THEORY
25. Paleoclimate evidence
In the modern world
glaciers are found near
the north and south
poles.
Deserts are largely
found in bands that are
parallel to the equator.
Extensive reef
complexes lie along the
equator.
27. 27
There is proof that glaciers moved from Africa,
through the Atlantic Ocean, and then on towards
South America. This would be much easier if the
Atlantic Ocean were not there
What did you notice?
29. 29
Warm weather plants have been found in the Arctic… but
it’s not warm there!
Glacier deposits have been discovered in tropical and
desert locations…it’s not cold there, either!
30. 30
How could you explain this?
why glacial deposits were
found in areas where no
glaciers exist today?
32. 32
SAD FACT!
Wegener had evidence of one large land mass, he
didn’t have the answers to what force (engine)
“floated the plates”. He was laughed at and did not live
to see his theory accepted.
33. 33
ROCKS
Huge belts of rocks found in
Africa and South America
were identical. Not only
were they the same, but
they would match up (age,
thickness, types) if the
continents were put
together.
34. 34
• Mountains
– Some mountain ranges on different contin
– ents seem to match.
• Ex: ranges in Canada match Norway and Sweden
• Ex: Appalachian Mtn. match UK mtn
38. MAGNETIC STRIPES
Magnetic stripes provide
evidence of sea floor
spreading
-striped magnetic patterns
developed , Because
oceanic crust pulls apart ,
magma rises to the surface
at mid- ocean ridges.
39. MORE SEAFLOOR INFORMATION!
• Seafloor spreading formed 270 million years ago
• Broke apart about 200 million years ago
• Sea floor spreading is one of the two major processes of the plate
tectonics.
• Volcanoes and other features that grow or fall into sea floor
spreading to move and sink with the sea floor spreading over time .
• the sea floor spreading on each side of a mid -ocean ridge move in
different directions each side belongs to a different lithosphere
plate
40. Is it possible that the continents would converge into a
single landmass or supercontinent after 250 million years?
The cycle of supercontinent
splitting into small continents
and recombining as a single
landmass will continue in the
next billion of years (Pangaea
Proxima meaning “The next
Pangaea”) Christopher Scotese
44. EVALUATION
➢ Who was the person who came up with the hypothesis of
Continental Drift?
➢ What was the large landmass called?
➢ Name four evidences the supports Continental Drift
➢ What is the one question that needs to be answered to prove the
Continental drift theory?
➢ What phenomenon proves the continental drift theory? (happens
under the sea)
44
45. References
➢ Science Learner’s Module 1: Grade 10
➢ Department of Education, Bureau of Secondary Education. Project EASE
➢ Integrated Science 1, Module 12: Inside the Earth.
➢ Department of Education, Bureau of Secondary Education (2013). Science
➢ Grade 8 Learner’s Module. Vibal Publishing House, Inc.
➢ Tarbuck, E.J. et al. (2009). Earth Science 12th ed. Pearson Education
➢ South Asia Pte Ltd.
➢ http://www.skoool.ie/ accessed March 3, 2014
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