For Science Grade 10

1. Continental Drift Theory
and
Seafloor Spreading

2. Topics to be Discussed
What is Continental Drift Theory?
Evidences of Continental Drift Theory
Seafloor Spreading
Evidences of Seafloor Spreading

3. What is Continental Drift Theory?
 It is a theory that states
that continents were
once large landmass
called Pangaea which
drifted away from each
other.

4. What is Continental Drift Theory?
 Alfred Wegener

5. What is Continental Drift Theory?
 It is a theory that states
that continents were once
large landmass called
Pangaea which drifted
away from each other.

6. What is Continental Drift Theory?
 It is a theory that states
that continents were once
large landmass called
Pangaea which drifted
away from each other.

7. Evidences of Continental Drift
 Fossils
 Rock Layers
 Coal Deposits
 Puzzle Fit

8. Evidences of Continental Drift
 Fossils
European Flora

9. Evidences of Continental Drift
 Fossils
European Flora

10. Evidences of Continental Drift
 Fossils Glossopteris
European Flora

11. Evidences of Continental Drift
 Fossils
Mesosaurus

12. Evidences of Continental Drift
 Rock Layers

13. Evidences of Continental Drift
 Rock Layers

14. Evidences of Continental Drift
Coal
Deposits

15. Evidences of Continental Drift
Puzzle Fit of
the
Continents

16. Evidences of Continental Drift
Puzzle Fit of
the
Continents

17. Evidences of Continental Drift
Puzzle Fit of
the
Continents

18. Seafloor Spreading Theory
It states that hot less
dense material from
below the Earth’s surface
rises towards the surface
at mid oceanic ridge

19. Seafloor Spreading Theory
Developed by Harry
Hess and Robert Dietz

20. Seafloor Spreading Theory

21. Seafloor Spreading Theory

22. Seafloor Spreading Theory

23. Seafloor Spreading Theory

24. Seafloor Spreading Theory

25. Seafloor Spreading Theory

26. Evidences of Seafloor Spreading
Age of Rocks
 Magnetic Reversals

27. Evidences of Seafloor Spreading
Age of Rocks
 Magnetic Reversals