Transcript Plate Tectonics

Plate Tectonics
Plate Tectonics
Icons key:
For more detailed instructions, see the Getting Started presentation.
Flash activity. These activities are not editable.
Accompanying worksheet.
1 of 31
Printable activity.
Teacher’s notes included in the Notes Page.
Useful web links.
© Boardworks Ltd 2005
2008
How old is the Earth?
What is the Earth made from?
Contents
What is plate tectonics?
What happens at the different types of
plate boundary?
Summary activities
The key concepts covered are:
Space and Physical and human processes.
2 of 31
© Boardworks Ltd 2008
Howold
old is
How
isthe
theEarth?
Earth?
By the end of this section, you will:
Be able to identify
important points on the
Earth’s timeline.
Have discovered how old
the Earth is.
3 of 31
© Boardworks Ltd 2008
History of the Earth
4 of 31
© Boardworks Ltd 2008
More than ever
We know more about the Earth than we ever have before.
Scientific advances have significantly
changed our knowledge of the
structure of the Earth.
We can now say:
what the structure of the
Earth is
how the Earth has
changed over time
what might happen to the
Earth in the future.
Do we know everything about the
Earth’s structure and its history?
5 of 31
© Boardworks Ltd 2008
What
is
the
Earth
made
What is the Earth made
from?
from?
By the end of this section, you will:
Be able to identify what the
Earth is made of.
Understand how these
layers fit together.
Learn more details about
the Earth’s structure.
6 of 31
© Boardworks Ltd 2008
Looking into the Earth
7 of 31
© Boardworks Ltd 2008
Across the Earth
8 of 31
© Boardworks Ltd 2008
Structurally sound?
9 of 31
© Boardworks Ltd 2008
What is
What is plate
plate
tectonics?
tectonics?
By the end of this section, you will:
Know what is meant by the
term plate tectonics.
Know what continental drift
is and how it affects Earth.
Be able to identify and
name the major plates.
10 of 31
© Boardworks Ltd 2008
Continental drift
11 of 31
© Boardworks Ltd 2008
Evidence for continental drift
It was not until the 1960s that the theory of continental drift
became accepted by the scientific community.
Some continents fit together
almost perfectly, e.g. South
America and Africa.
Similar fossils can be found on
different continents. This shows
these regions were once very
close or joined together.
Almost identical patterns of rock layers on different
continents is evidence that the rocks were once close
together or joined.
Why are the continents moving?
12 of 31
© Boardworks Ltd 2008
What is plate tectonics?
In the 1960s geologists used surveys of the ocean floor to
explain continental drift with the theory of plate tectonics.
The Earth's surface is made up of a number of large
plates that are in constant, slow motion.
The ocean floors are continually moving, spreading
from the centre and sinking at the edges.
The edges of these plates – plate boundaries – are
where earthquakes and volcanoes occur.
Convection currents in the mantle move the plates.
The plates ‘float’ on the mantle and move around the
Earth’s surface.
How do the plates actually move?
13 of 31
© Boardworks Ltd 2008
Why do the plates move?
14 of 31
© Boardworks Ltd 2008
Plate names
15 of 31
© Boardworks Ltd 2008
What
happens
atthe
the
different
What
happens at
different
types of
of plate
types
plateboundary?
boundary?
By the end of this section, you will:
Know that there are different
types of plate boundary.
Understand what happens at
the different plate boundaries.
Be able to state on what type
of boundary earthquakes and
volcanoes are likely to happen.
16 of 31
© Boardworks Ltd 2008
Know the boundaries
The tectonic plates
are moving in
different directions.
The movements have
different effects on the
landscape of the Earth.
Plates that are moving in opposite directions form a
constructive boundary.
Plates that move towards each other form either a
destructive boundary or a collision boundary.
Plates sliding by each other form a conservative boundary.
Can you name one example of each of
the different boundary types?
17 of 31
© Boardworks Ltd 2008
Have you got the edge?
18 of 31
© Boardworks Ltd 2008
Constructive plate boundary
19 of 31
© Boardworks Ltd 2008
Constructive information
20 of 31
© Boardworks Ltd 2008
Destructive plate boundary
21 of 31
© Boardworks Ltd 2008
Destructive order
22 of 31
© Boardworks Ltd 2008
Collision plate boundary
23 of 31
© Boardworks Ltd 2008
Destructive or collision?
24 of 31
© Boardworks Ltd 2008
Conservative plate boundary
25 of 31
© Boardworks Ltd 2008
Conservative order
26 of 31
© Boardworks Ltd 2008
Plate definitions
27 of 31
© Boardworks Ltd 2008
Summary activities
Summary
activities
By the end of this section, you will:
Know the key points of
plate tectonics.
Understand important
words and phrases relating
to plate tectonics.
28 of 31
© Boardworks Ltd 2008
Summary quiz
29 of 31
© Boardworks Ltd 2008
Glossary
30 of 31
© Boardworks Ltd 2008
Anagrams
31 of 31
© Boardworks Ltd 2008