1. The document discusses theories of Earth's formation and structure, including the solar nebular theory, continental drift theory, and plate tectonics. 2. It explains that Earth has different layers including the inner and outer core, mantle, and crust. The crust is broken into plates that move due to convection currents in the mantle and gravity. 3. The document also covers earthquakes, describing primary and secondary waves, focal points, and locations being determined through trilateration. Earthquakes commonly occur at plate boundaries like the Ring of Fire. Volcanoes are also discussed in relation to plate tectonics.

1. 1. 2.
B
3.
A C

2. Earth Formation
Gravity
The
Solar
System
Solar
Nebular
Theory
The Earth
Inner Core Outer Core Mantle Crust
Everything that has mass has this
Caused the formation of
Called the
Has different layers
Defined as Defined as Defined as Defined as

3. Solid iron
and nickel
layer
Liquid iron
and nickel
layer
Solidish layer Solid layer
The continents
are moving
Continental Drift Theory says
The crust is broken
into crustal
plates
The Theory of Plate Tectonics says
Convection
currents
Gravity
The plates
move due to
In the

4. Crust
Lithosphere
Cracks
Plate
boundaries
Convergent
India
and
Asia
DivergentTransform
Earthquakes
Sea floor
spreading
Also called the
Which has
Also called
Three major types are
Example ExampleCauses most

5. Earthquakes
Primary
Longitudinal,
move through
solids, liquids,
gas
Secondary
Transverse, move
through solids
only
Focus Epicenter
Trilateration
Produce two types of waves
Have two point locations
Defined as Defined as
Are located by

6. Earthquakes
The Ring
of Fire
Eurasian-
Melanesian
Mountain belt
Mid-ocean ridges
Occur mostly in

7. Plate
boundaries
Volcanoes
Cinder cone
Smallest
most
abundant
Composite
cone
Steep sided
Shield
Broad
and
rounded
Three types are
Defined as Defined as Defined as
These can also create