Transcript Earth`s Formation Play Earth`s Structure Lesson 2, video, What`s

Objective: Relate density to
the relative positioning of
Earth’s atmosphere, water,
crust, and interior.
1. How did the solar system form?
-Nebula-gas, ice and dust
-Gravity pulled materials
closer
-Nebula shrank/flattened
to a disk
-Disk begins to rotate
-Materials in center
become dense from outside
pressure.
-Sun is formed
How did the Solar System Form?
-Nebula-gas, ice and dust
-Gravity pulled materials
closer
-Nebula shrank/flattened to
a disk
-Disk begins to rotate
-Materials in center become
dense from outside pressure.
-Sun is formed
2. What caused them to come
together?
-Gravity is the force that every object
exerts on all other objects because of
their masses.
-Mass and distance are the factors.
GRAVITY
Earth’s Structure, Lesson 1, Review, Personal Tutor, Gravity
3.Which object has a stronger
gravitational force?
A.
B.
4. All four objects have the same mass. Which
row has the weakest gravitational force between
them?
A
B
A
B
C
D
E
5. Which planet pair would have the greatest amount of
gravitational pull between them?
6. Which planet pair would have the least
amount of gravitational pull between them?
7. Why does Earth exert a greater
gravitational force on you than other
objects like the sun?
 Earth has more
mass than any
object near you.
 It exerts a greater
gravitational force
on you than other
objects do.
 You don’t notice the
gravitational force
between less
massive objects.
8. Which
object in the
solar system
exerts the most
gravitational
pull on all the
other objects,
and why?
The sun.
It has the
most mass of
all the matter
in our solar
system.
9. How are the planets
shaped during Earth’s Final
Formation?
-Planets
shape from
remaining
bits of
material.
Earth formed as
gravity pulled
these small
particles together
-Particles stick in
uneven shapes as
they collide
-The larger mass
particles
attracted more
particles
-Continued to
grow large
-
-Generated
thermal energy
inside from the
surrounding
pressure
-Particles inside
melt and flow
-Gravity pulls in
irregular bumps
10. How were Earth’s layers created?
-Collisions created a
mass of solid
particles
-Thermal energy
from within began
to flow
-Distinct layers
formed based on
Density
-More dense toward
the center, less
dense toward the
outside
11. Relate the Earth’s formation by this
experiment: Put an iron block and a pinewood
block with the same volumes in a beaker of
water. Which will float on the surface and which
will be pulled through the water to the bottom of
the beaker by gravity?
-There is a stronger gravitational force
between Earth and a denser object than
there is between Earth and a less dense
object.
-When ancient Earth
started melting, the
densest materials
sank and formed the
innermost layer of
Earth.
-The least dense
materials stayed at
the surface and
formed a separate
layer.

Earth’s Structure, Lesson 2, video, What’s Inside.
Pulling it all together videoclip:

Earth’s Structure, Lesson 2, Review, Personal Tutor,
Density
Credits
Astronomy online
http://astronomyonline.org/SolarSystem/SolarSystemFor
mation.asp
Mail Online
http://www.dailymail.co.uk/sciencetech/article2034667/Earths-gold-platinum-arrived-meteor-showerlasting-200MILLION-years.html