Inside Earth 1 1 Earths Interior Geologists scientists

Inside Earth 1. 1 Earth’s Interior

Geologists = scientists who study forces that shape Earth

2 kinds of Forces • Constructive force = build up • Example: – Mountains and – Volcanoes

2 kinds of Forces • Destructive force = wear down • Example: – Erosion

Geologists study • Earth’s 7 continents

What happens when you dive deep in a pool?

What happens when you dive in a pool? • Increase pressure

Same as you go to the center of the Earth • Increase pressure and • Increase temperature

3 Main Layers of the Earth • Crust = outer layer • Mantle = middle • Core = center

Crust • Rocks • Mountains and • Oceans

Mantle • 2 parts

Mantle • 2 parts – Rigid UPPER mantle – Soft LOWER mantle

Lithosphere • Rigid UPPER mantle and the crust make up the Lithosphere

Asthenosphere • Below the rigid Lithosphere is the Asthenosphere • hot tar-like • soft like roasted marshmallow

Core • 2 parts – Outer Core is molten metal

Core • 2 parts – Outer Core is molten metal – Inner Core is a dense ball of solid metal (iron and nickel)

Earth’s Magnetic Field • Earth has a magnetic field just like a bar magnet

Earth’s Magnetic Field • Just like a bar magnet has a magnetic field that attracts iron filings in a circular pattern,

Earth’s Magnetic Field • Just like a bar magnet has a magnetic field that attracts iron filings in a circular pattern, Earth also has a magnetic field with a similar magnetic field attraction

Earth’s Magnetic Field • So when you use a compass, the northseeking needle of the compass aligns to Earth’s magnetic north pole