Scale Model of the Earth
Diagram 1: Earth’s Layers Based on COMPOSITION
Directions:
1. Place the following scrambled facts in the correct layer of the
Earth on Diagram 1: (use textbook pgs 96 & 97)











Thin & solid (5 – 100 km thick)
67% of the Earth’s mass
Continental Crust (thick & less dense)
Contains mostly: Fe & some: Ni
Contains little to no: O, Si, Al & Mg
33% of the Earth’s mass
Contains more: Mg & Fe and less: Si, O & Al
Oceanic Crust (thin & more dense)
Contains mostly O & Si along with Al, Ca, Na, K, Fe & Mg
Less than 1% of Earth’s mass
composition studied from volcanic eruptions
Remember your Element Symbols:
Fe = iron
O = oxygen
Ni = nickel
Si = silicon
Al = aluminum
Mg = magnesium
Ca = calcium
Na = sodium
K = potassium
Scale Model of the Earth
Diagram 1: Earth’s Layers Based on COMPOSITION
CRUST
MANTLE
CORE
Directions:
2. Place the following scrambled facts in the correct layer of the
Earth on Diagram 2: (use textbook pgs 98 & 99)







Liquid due to heat
Solid due to great pressure
Plastic layer (rock that flows slowly)
Rigid layer, divided into tectonic plates
Found within the mantle
Strong & thick, lower part of the mantle
Contains the crust & top of the mantle
3. Answer the Additional Questions found below Diagram 2.
4. Color-code the layers on both Diagram 1 & 2.
Diagram 2: Earth’s Layers Based on PHYSICAL STRUCTURE
ASTHENOSPHERE
LITHOSPHERE
MESOSPHERE
OUTER CORE
INNER CORE
ADDITIONAL QUESTIONS
1. Why is the core more dense than the mantle and crust (p. 96)?
2. What makes ocean crust more dense than continental crust (p.96)?
3. How do we know anything about the interior of the Earth (p.102)?