Warm Up Film Canister: Try to determine what is in your film canister without opening it. Make observations about what it looks like on the outside and observations (remember sight is not the only sense we can use to make an observation) about what is in the inside. Write your observations in your notebook, and also give your hypothesis for what is inside. Film Canister: Try to determine what is in your film canister without opening it. Make observations about what it looks like on the outside and observations (remember sight is not the only sense we can use to make an observation) about what is in the inside. Write your observations in your notebook, and also give your hypothesis for what is inside.

Before Looking Inside... Let’s observe the outside of the Earth. Let’s observe the outside of the Earth. Scientists like to divide the Earth into four spheres. Scientists like to divide the Earth into four spheres.

Litho – Latin for rock

Gas envelope around the earth

Water parts of the earth Lake Lanier

Bio means living!

What Is Inside the Earth?

Going Deep The deepest mine on the Earth is 3.8 km deep – but it only scratches the surface! The deepest mine on the Earth is 3.8 km deep – but it only scratches the surface! So, if we can’t observe the center of the Earth directly, what can we do? So, if we can’t observe the center of the Earth directly, what can we do?

Finding Indirect Evidence The interior of the Earth cannot be observed directly. The interior of the Earth cannot be observed directly. Seismic Waves (the waves of an earthquake) are used to learn about the interior of the Earth. Seismic Waves (the waves of an earthquake) are used to learn about the interior of the Earth.

Journey to the Center of the Earth Temperature increases as you move towards Earth’s center. Temperature increases as you move towards Earth’s center. Pressure increases as you move towards Earth’s center. Pressure increases as you move towards Earth’s center.

The Earth’s Layers Crust Crust –The layer of rock that forms Earth’s outer skin –It is solid and ranges in depth from 5-40 km thick. –It is primarily made up of the rocks granite and basalt

The Earth’s Layers Mantle Mantle –A solid layer of material – hot rock –Lithosphere – made up of the upper mantle and the crust –Asthenosphere – a soft layer of the mantle that can bend like plastic –The lithosphere floats on the asthenosphere –Solid mantle – extends to the core –The mantle is 2,900 km thick

The Earth’s Layers Outer Core Outer Core –Made up of iron and nickel –It is a layer of molten (liquid) metal that surrounds the inner core –The outer core is 2,250 km thick

The Earth’s Layers Inner Core Inner Core –It is a dense ball of solid metal –It is also made up of iron and nickel –The inner core is 1,200 km thick –The inner and outer core together are just slightly smaller than the moon –Currents in the outer core cause the inner core to spin slightly faster than the rest of the Earth; the result is the Earth’s magnetic field

Summary Activity – Choose One Option One: Option One: –Draw, label, and color the layers of the Earth as shown on page –Make sure to label each layer including the lithosphere and asthenosphere, as well as the depth of each layer Option Two Option Two –Write a story about a journey to the center of the Earth –Be sure to include information about each layer you pass through, including the lithosphere and asthenosphere, as well as the depth of each layer