1. Earth Science Earth Science Purpose: Study the origin, composition, and history of the Earth. Discover how the history of the Earth relates to the origin of life on this planet.

2. Do Now Answer the following in a paragraph: Answer the following in a paragraph: –Where did the Earth come from? –How old is the Earth? –What is the Earth made of?

3. What will we be studying? Over the next few months we will study a variety of topics. Over the next few months we will study a variety of topics. We will discover where the Earth came from. We will discover where the Earth came from. We will learn what the Earth is made up of. We will learn what the Earth is made up of. We will learn how the Earth and life on this planet are related. We will learn how the Earth and life on this planet are related.

4. Earth’s Story Close your eyes. I am going to read you a story. Try to picture the events in your mind as I read you this story. Close your eyes. I am going to read you a story. Try to picture the events in your mind as I read you this story. Read page 37 on your own. As you read take notes on the major events that occurred during Earth’s formation. Read page 37 on your own. As you read take notes on the major events that occurred during Earth’s formation.

5. The Formation of Earth Over billions of years gravity pulls together a cloud of hot gases and dust. The cloud condenses into a giant sphere of matter. A planet forms. Over billions of years gravity pulls together a cloud of hot gases and dust. The cloud condenses into a giant sphere of matter. A planet forms. Particles clump together. Larger and larger clumps form, colliding into each other with greater and greater force. These collisions release massive amounts of energy, in the form of heat, light, and sound. Resulting in a mass of molten rock. Particles clump together. Larger and larger clumps form, colliding into each other with greater and greater force. These collisions release massive amounts of energy, in the form of heat, light, and sound. Resulting in a mass of molten rock.

6. The Formation of Earth Slowly the planet cools. A solid crust forms, but the interior remains extremely hot. Slowly the planet cools. A solid crust forms, but the interior remains extremely hot. The molten rock inside creates great pressure. The pressure must be released, so Volcanoes develop across the Earth’s surface. The molten rock inside creates great pressure. The pressure must be released, so Volcanoes develop across the Earth’s surface. Constant eruptions form a poisonous atmosphere. Constant eruptions form a poisonous atmosphere.

7. The Formation of Earth 200 million years pass. 200 million years pass. Liquid water collects on the Earth’s surface. Planet wide oceans form. Liquid water collects on the Earth’s surface. Planet wide oceans form. 300 million years later living things develop in these oceans. 300 million years later living things develop in these oceans. Life evolves and changes over the next 3.5 billion years. Life evolves and changes over the next 3.5 billion years. One day a very special living thing arises, a life form called humans. One day a very special living thing arises, a life form called humans.

8. Spheres within spheres. The Earth is made up of three main parts: The Earth is made up of three main parts: Lithosphere: Topmost solid part of the Earth, which is composed of the crust and some of the mantle. Lithosphere: Topmost solid part of the Earth, which is composed of the crust and some of the mantle. Hydrosphere: Part of the Earth’s surface consisting of water. Hydrosphere: Part of the Earth’s surface consisting of water. Atmosphere: A mixture of gases that surrounds the Earth. Atmosphere: A mixture of gases that surrounds the Earth.