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Chapter 2 – 2 Forces Shaping Earth

Explore the forces inside and outside Earth, from tectonic plates to surface erosion. Discover Earth's layers and seismic activity along plate boundaries. Dive into the formation of volcanoes and earthquakes, and learn about the impact of weathering and erosion. Join an online latitude quiz and grasp the dynamics of our planet's geography. Unveil the mysteries of Earth's core, mantle, and crust while witnessing the power of heat and plate movements. Don't miss this enriching journey into the depths of our planet's formation!

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Chapter 2 – 2 Forces Shaping Earth

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  1. Chapter 2 – 2 Forces Shaping Earth World Geography

  2. Review From Yesterday • What do you remember about the revolution of the earth? • What do you remember about days and nights? • How does latitude affect the seasons?

  3. On a ½ piece of paper • Online Latitude Quiz • Not graded but do you must do your best!

  4. Today, you will learn… • Today you will be learning about the forces that shape our planet Earth, both inside and out. • You will also learn about the different layers that make up the earth. • What exactly is plate tectonics?

  5. The Pacific Ring of Fire This is a great example of the forces that are currently shaping our planet earth.

  6. What does the earth look like on the inside? • An easy way to think of the inside of the earth is to imagine that the earth is a giant gobstopper with many different layers, flavors, and colors.

  7. A) Earth’s Layers • 1) The core is a sphere of very hot metal at the center of the earth. • 2) The mantle is a thick, hot, rocky layer surrounding the core. • 3) The crust is the thin layer of rocks, and minerals that surround and float on the mantle.

  8. Layers of Inner Earth

  9. B) Water • 1) 70% of the earth’s surface is water • Lakes, rivers, seas, oceans. • 30% is land • 2) 97% of water is in oceans • 3% of world freshwater.

  10. Get it?

  11. C) Forces Inside Earth • 1) Heat deep inside Earth is constantly reshaping the planet • 2) The earth is made up of moving plates of land that “float” on magma. Just like boiling water, magma bubbles to the surface of the earth

  12. Earth’s Moving Tectonic Plates Through Time Bilions of years ago, all continents were connected in a supercontinent named Pangea

  13. Website • Pangea Website

  14. D) Volcanoes and Earthquakes • 1) Volcanoes are formed by two tectonic plates colliding and one plate sliding under another plate. • 2) Earthquakes are caused when two plates push into each other.

  15. World Seismicity 1978 - 1987 Notice how all earthquakes have occurred along plate boundaries!

  16. E) Forces on Earth’s Surface • Forces inside the earth create. • Forces on the outer part of the earth wear earth down and reshape it. • 1) Weathering is a process that breaks rocks down into tiny pieces. • 2) Erosion is the removal of small pieces of rock by water, ice and wind.

  17. Website • Layers of the Earth Website - CNN

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