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Structure of the Earth
• Take a minute and share some different structures that are on
Earth with your table
• The Earth is made of four layers
– _____________ Core
– _____________ Core
– M___________
– Crust
CORE:
• ___________________ Core
– Made of ____________ and ___________________
– Temperatures at _______________°C (10,000°F)
– Although temperatures are hot it is ____________ due to great
__________________ from the above layers
• ____________________Core
– Molten (_________________) iron and nickel
– Temperature between ___________C (7,200°F) & ___________°C
MAGMA:
• Thick layer of hot, solid __________ between the ____________ and the
___________________ __________________ ___________________.
• Upper mantle melts rocks, forming a substance called ______________
which flows like a thick liquid
ASTHENOSPHERE:
• The mechanically weak _____________ region of the ___________ mantle
that is ________________ & ____________________ due to extreme
___________________________ & _______________________
– Plastic means that the __________________ of the rock is flowing
but it is not a _______________________
– ______________________ currents occur here due to uneven
_______________________
CONVECTION CURRENTS:
• Heat from the ______________ and the ___________ itself causes
_________________________ currents in the _____________________.
• ____________________ and __________________ of the fluid, changes in the
fluid’s ________________________, and the force of gravity combine to
set convection currents in ______________________.
Define DENSITY!
CRUST:
• A solid layer of rock that includes both ___________________ and the
________________________________________.
LITHOSPHERE:
• The ___________________ shell of the rocky planet that floats on top of
the _____________________________________
• Made up of the ________________ & the ____________ solid rocky part of
the ________________________
• ________________, ____________________, & has ___________________ lines
• Divided into _________________________
– Plates are _______________________________________________________