The Ocean Floor Day 1

Objectives Today I will be able to: Identify the main ____________of the world. Compare the methods used to map the oceans. Name __________ resources found on the ocean floor. _______________the use or protection of resources found in the ocean.

Our Oceans As we know, oceanography is the study of oceans. Over ______ of earth is covered by water, and most of that water is in the oceans.

Our Oceans There are four major oceans: – __________ocean: the _________and deepest – __________ocean: about half the size of the Pacific – __________ocean: surrounds the far northern part of earth – __________ocean

Mapping the Ocean Floor Scientists use technology to _______the ocean floor: 1._______________ 2._______________ 3._______________

Mapping the Ocean Floor 1.Sonar technology is used by scientists to measure ocean _______________. – Also known as echo sounding, sonar works by transmitting sound waves towards the ocean floor. – How submarines use sonar How submarines use sonar

Mapping the Ocean Floor 2.Satellites – Satellites orbit the planet and are able to measure surface height by __________microwaves off the _____________. – Ocean surface changes elevation based on the features on the sea floor. – Tracking climate change using satellites Tracking climate change using satellites

Mapping Ocean Floor 3.Submersibles Submersibles are small underwater crafts used for deep-sea research. Collect ________about areas of the ocean that were previously _________________ by humans. Remain underwater for ________periods of time. We will watch a video next week that was shot using submersibles.

Check In – Oceans Day 1 Answer the following questions in complete sentences. 1.How much of the earth’s surface is covered by oceans? 2.Name the four main oceans. – Which one is the largest? – Which one is the deepest? 3.How does the topography of the ocean compare to that on land? – Name 3 features found on the ocean floor that we discussed. 4.How has technology increased our understanding of the ocean?

Ocean Resources One of the reasons humans study oceans is because oceans are full of ___________. A resource is anything that can be used or sold. There are two types of resources in the oceans: – _________Resources (___________) – __________-Energy Resources

Energy Resources Oil and Natural Gas – The main energy resource taken from the oceans Over millions of years _____________transformed the remains of marine sediments into oil and natural gas. Right now ___________ of earth’s oil resources come from a process known as _______________. Video on Offshore Drilling

Energy Resources Oil and Natural Gas  While offshore drilling seems like a simple solution to earth’s diminishing oil supply, it is ______________________for several reasons. 1.It is _____________________ 2.It is _____________________ 3.It causes _____________________ 4.Eventually we will _____________________ Video about the debate to drill offshore – 2008 On Tuesday night there was accident off the coast of Louisiana, watch the CNN report from this morning. CNN report from this morning.

Energy Resources Gas Hydrates – Gas hydrates are compact chemical structures made of __________and ________________. Gas Hydrate video

Non-Energy Resources Other major resources from the ocean floor include: – ____________ – _____________ – Evaporative _____________: used as table salt, dying fabric and de-icing roads

Non-Energy Resources Sand and Gravel – Used to for landfill and to make concrete. – The mining of sand and gravel can result in large amounts of sediments being ________________in water. – How might this affect marine organisms living in the area? ____________________________

Check-In Questions – Oceans Day 1 Answer the following questions in complete sentences. 5.Name 3 energy resources obtained from the ocean. 6.How much of the world’s oil production currently comes from offshore regions? 7.Name 3 non-energy resources obtained from the ocean.