Presentation on theme: "Exploring the Oceans Write-On Grade Five Materials adapted from: Tennessee Edition Harcourt Science Grade 5 Unit C 2003 Edition Harcourt School Publishers."— Presentation transcript:
Exploring the Oceans Write-On Grade Five Materials adapted from: Tennessee Edition Harcourt Science Grade 5 Unit C 2003 Edition Harcourt School Publishers
Learner Expectations Content Standard: 9.0 The student will understand that the earth has many geological features that are constantly changing. Learning Expectations: 9.1 Recognize that the earths geological features change.
Addressed Areas POPULATIONS AND ECOSYSTEMS: A population consists of all individuals of a species that occur together at a given place and time. All populations living together and the physical factors with which they interact compose an ecosystem. NATURAL HAZARDS Human activities can induce hazards through resource acquisition, urban growth, land-use decisions, and waste disposal. Such activities can accelerate many natural changes.
Exploring the Oceans Oceans are complex systems that interact with Earths land, air, and living organisms. They are affected by the gravitational pull of the moon and the sun.
Learner Outcomes: Explore an Ocean Conduct a Google search forGoogle information on the worlds oceans and research for interesting facts. Students will: Identify four oceans and take short notes about them. Make a Venn Diagram that shows relationships between the oceans. Go on a web quest by Peyri Ingrum titled The Oceans in Trouble and explore what happens if an ocean is in trouble.
What are oceans like? *In your Science Journals: Describe what oceans and seas are. Describe features of the ocean floor. Then, take a Webquest.
Oceans and Seas Most of the Earths surface is covered with a continuous body of salt water divided into four oceans and many seas. The deepest ocean is the Pacific Ocean. The shallowest is the Atlantic Ocean. Seas are smaller than oceans and are separated from each other or from an ocean by land or by a chain of islands.
The Ocean Floor Continental Shelf Around the edges of the continents, a shallow area called the continental shelf extends into the ocean for about 50 miles. It is no deeper than 460 feet, although it varies in width from one mile to about 745 miles in the arctic regions.
The Ocean Floor Continental Slope Beyond the continental shelf is a steep continental slope that drops sharply to a depth of about 10,000 feet. After that it slopes more gradually to a depth of about 13,000 feet. In some places the continental slope is deeply cut by canyons. Many of these canyons have been carved by large rivers entering the oceans.
The Ocean Floor Abyssal Plains The flattest parts of the ocean floor, which are also the flattest parts of the Earths surface, are the abyssal plains. They are an average depth of 16,000 feet. They are covered with a thick layer of ooze consisting of mud, sand, and decaying organic matter. The abyssal plains cover vast areas of the ocean floor.
Dont Forget… Come back to the power point presentation to finish the lesson. You have a writing activity.
Webquest *A special thanks to the Author of The Oceans in Trouble! by Peyri Ingrum.
Writing Activity Write a paragraph about an ocean ecosystem and the effect living things or man have on this environment. Use four facts that you learned from this presentation.