1. Earth’s Interior

2. How do geologists learn about Earth’s Interior?
Rock samples – drilling holes
Seismic Waves
Geologists study seismic waves produced by earthquakes and study how they move through the Earth.
TYPES OF SEISMIC WAVES

3. What are features of Earth’s crust, mantle, and core?
Three main layers of Earth crust, mantle, core.
Composition of each is affected by pressure and temperature, which increase as you travel down towards the core.
Crust is solid and consists of continental and oceanic crust.
Continental crust is less dense and consists of a variety of rock types.
Oceanic crust is more dense and consists mostly of basalts.

5. Building a model of the Earth
What is a scale model?
Example – scale model of a car.
Used by engineers to see how parts fit and work together.
Example of a scale 1” = 1’.
In this project 1 cm = 1,000 km. Round up or down the kilometers to convert the thickness dimensions to centimeters.

6. Data to use to construct your model
This would be a four layer model consisting of;
The crust = 40 km thick
The mantle = 3,000 km thick – this will contain the lithosphere, asthenosphere, and mesosphere.
The outer core = 2,258 km thick
The inner core = 1,222 km thick.

8. Vocabulary Seismic wave Pressure Crust Basalt Granite Mantle
Outer core
Inner core

9. Earth’s Core and the Magnetic Field
Scientists think that the movements within the liquid outer core create Earth’s magnetic field
Earth’s magnetism

10. Magnet Activity
One drawing of what you think the magnetic field looks like.
One drawing of the magnetic field using one magnet.
One drawing of the magnetic field using two magnets.
In writing answer these two questions;
How does one magnetic field affect another magnetic field ? Reference your drawing/observation from step three.
What does a magnetic field look like and why is it important that the Earth has one?

11. Bar Magnet and iron filings
Magnets have lines of force that attract metals. Draw what you think these lines look like.
Take a ziploc bac and place magnet inside the bag. Seal
Place a piece of paper and place on top of the ziploc bag.
Gently, and evenly sprinkle iron filings on top of the piece of paper.
Draw the magnetic lines of force.
Try it with two magnets inside the bag.
DO NOT LET THE MAGNET CONTACT IRON FILLINGS UNLESS INSIDE BAG!