possible causes of tectonic plates

1. EARTH’S MECHANISM
SCIENCE 10 – QUARTER 1, MODULE 4

2. CONTINENTAL DRIFT THEORY

3. What is the Theory of Plate Tectonics?
The theory that pieces of Earth’s lithosphere are in constant motion, driven by
convection currents in the mantle.
• Plates move
slowly in
different
directions
Cause different
geologic events
(like
earthquake,
volcano, etc.)

4. Convection in the Mantle Vocabulary
A layer beneath where the less dense hot
molten material rises, and sinks
tmnael
mantle

5. Convection in the Mantle Vocabulary
A soft, weak and plastic-like layer, the upper part
of the mantle where lithospheric plates float and
move
thprehaeosens
asthenosphere

6. Convection in the Mantle Vocabulary
Hot molten rocks formed beneath the Earth’s
surface.
mmgaa
magma

7. Convection in the Mantle Vocabulary
Facilitates the movement of the lithospheric
plates.
noitcevnoc ctunrre
convection current

8. Convection in the Mantle Vocabulary
The innermost layer of the Earth, which
generates heat to the mantle.
orce
core

9. CONVECTION IN
THE MANTLE

10. WHAT IS
COVECTION?
• Convection is one of
the kinds of heat
transfer; the other two
are radiation and
conduction.

12. WHAT IS
COVECTION?
• The convection currents
tend to move a fluid, gas
particles, or molten rock.
• These are due to the
differences in the
densities and the
temperature of a specific
gas or a fluid.

13. Hot fluid tends to rise
as it expands, whereas
cold fluid tends to sink
because it contracts
Due to the difference
of temperatures,

14. ASSESSMENT 1
Put a checkmark (√ ) on
the convection process
being described.

15. EXAMPLES OF
CONVECTION

16. ASSESSMENT 2
Write five examples of a situation or object that uses convection current
Boiling Water
Rising hot air balloon
Melting of Ice
Thawing of frozen meat
Convection in the mantle

19. ASSESSMENT 2
1.What represents the
plates?

20. ASSESSMENT 2
2. What represents the
mantle?

21. ASSESSMENT 2 3. Where is the heat source?

22. ASSESSMENT 2
4. Why are the blocks of
wood floating?

23. ASSESSMENT 2
5. Which part of the water
has a greater density?
Lesser density?

24. ASSESSMENT 2
6. Explain Convection
Current

25. The plastic-like upper portion of the mantle is
called ______________.
A. the magma
B. the core
C. the lithosphere
D. the asthenosphere

26. The motion of gas or liquid caused by
differences in temperature is a _________.
A.tectonic movement
B. plate tectonic
C.convection current
D.magma chamber

27. What is the source of heat generated by the
core to the mantle?
A.gases
B.decayed radioactive elements
C.molten rocks
D.molten metals

28. A driving force for plate motion at mid-ocean
ridges as a result of the rigid lithosphere sliding
down _______________.
A.slab pull
B. ridge push
C.convection current
D. seafloor spreading

29. Which of the following is NOT a driving force
of tectonic plates?
A.ridge push
B.slab push
C. drag force
D.mantle convection

30. The plastic-like upper portion of the mantle is
called ______________.
A. the magma
B. the core
C. the lithosphere
D. the asthenosphere

31. The motion of gas or liquid caused by
differences in temperature is a _________.
A.tectonic movement
B. plate tectonic
C.convection current
D.magma chamber

32. What is the source of heat generated by the
core to the mantle?
A.gases
B.decayed radioactive elements
C.molten rocks
D.molten metals

33. A driving force for plate motion at mid-ocean
ridges as a result of the rigid lithosphere sliding
down _______________.
A.slab pull
B. ridge push
C.convection current
D. seafloor spreading

34. Which of the following is NOT a driving force
of tectonic plates?
A.ridge push
B.slab push
C. drag force
D.mantle convection