G.S. Powell and S. Deperno 8th Grade Science East Cary Middle School

Slides:



Advertisements
Similar presentations
Oceans.
Advertisements

Oceans. Cues  World Oceans  Seas  Properties of Ocean Water  Elements  Salinity  Sources  Salinity Levels  Gases  Temperature  Ocean Floor 
Chapter 20 Section 1 Review Page 500
Chapter 20 Section 1 Review Page 500
Seawater Chemistry.
OCEAN WATER.
Oceans. Four Oceans of Planet Earth Names Names Pacific Pacific Atlantic Atlantic Artic Artic Indian Indian Characteristics Characteristics Largest Largest.
Section 1: Properties of Ocean Water
Review and New Material  Now that our class has tested… its times to move on BUT…. before we do one last review.
Partner Reading Take out your spiral notebook. Open your textbook to page 75. Read pages Pair up with one other person Each reads 2 paragraphs As.
◦ 70-71% of Earth’s crust covered by ocean water ◦ 4 Major Oceans  Pacific – largest and deepest  Atlantic- little larger than the Indian  Indian –
Chapter 18 Ocean Motion Section 18-1 Ocean Water Notes Guide.
Key Ideas Describe the chemical composition of ocean water.
Characteristics of the Ocean Beth Roland Eighth Grade Science Team 5 Mountaineers.
Properties of seawater. Properties of water 1.Polarity and hydrogen bonding cohesion good solvent many molecules dissolve in H 2 O 2.lower density as.
Water and Weather. Water and Weather Chapter Seven: Oceans 7.1 Introduction to Oceans 7.2 Waves 7.3 Shallow Marine Environments 7.4 The Ocean Floor.
Ocean Chemistry Goal: Describe salinity and factors that are affected by changes in salinity levels. Agenda: 1. Wrap up ‘Ocean Profile’ lab 2. Warm-up.
Water and Weather Chapter Seven: Oceans 7.1 Introduction to Oceans 7.2 Waves 7.3 Shallow Marine Environments 7.4 The Ocean Floor.
Oceans. Why is the Ocean Salty? 1. The ocean is salty because of dissolved chemicals eroded from the Earth's crust and washed into the sea. 2. Ejections.
Notes: The Ocean (Sheets in orange tray!) 28 September 2015.
Ocean Water. The salt has seeped into the oceans by dissolving out of the rocks, and being carried down rivers into the ocean for millions of years. Salinity-
30.Ocean Properties EQ: What are the different aquatic ecosystems? Why are they so important to life on Earth? LT: I can identify the three life zones.
Part 1. Aspects of a Marine Environment Wind Waves Tides Currents Temperature Salt and salinity **Take a minute and write what you know already about.
Salt Water Oceans 11.
Ocean Water Chemistry Chap 13 – Section 3. Why is ocean water salty? Undersea volcanoes erupted, ejecting chemicals into the water Rains eroded land washing.
Chapter 13: Exploring the Oceans. Our Ocean About 71% of the Earth’s surface is covered with water. Where is all that water found? In the ocean, of course!
State Standards Hydrology
THE NATURE OF WATER CHAPTER 6. THE WATER PLANET WATER COVERS ABOUT 71% OF THE EARTH’S SURFACE. PROVIDES MORE THAN 99% OF THE BIOSPHERE THE VAST MAJORITY.
Chapter 20 Section 1 Review Page 500
Ocean Properties.
Unit. 2 Mr. Lara Marine Science Class
Water Distribution and the Water Cycle
Chapter 13: Oceans Section 1: Ocean Water
Ocean Water Chapter 20.
Chemistry of Water The oceans of the Earth are one continuous body of water covering the majority of our planet The ocean is is connected to all of Earth’s.
Chemical Oceanography
Properties of Seawater
Ocean Composition Mrs. Streetman.
G.S. Powell and S. Deperno 8th Grade Science East Cary Middle School
Ocean Composition.
Ocean Composition.
“where the rivers meet the sea”
Notes: the Ocean.
Oceans The student will understand...
Physical Oceanography
Earth’s Oceans.
Salinity of Oceans.
Ocean water.
Ocean Composition.
Currents and Climates.
How Ocean Water Differs from Fresh Water
How would you describe the composition of the ocean?
CHAPTER 5 Water and Seawater
Properties of Ocean Water
The Composition of Seawater
Oceans.
70% of the Earth is covered by ocean water!
Earth Systems, Structures and Processes
Today’s Agenda… 1-20 Bellringer Questions on Review Sheet
Ocean Composition.
Chapter 8 sec 1 Ocean Waters’
Motion in the ocean Chapter 3.
OCEANS Pages
Water Review 8th grade EOG.
Currents and Climates.
Properties of Ocean Water
Dissolved Gases in the Ocean
TEMPERATURE Sunlight heats the surface of ocean water (H2O)
Seawater 15.2.
Water and the Water Cycle
Presentation transcript:

G.S. Powell and S. Deperno 8th Grade Science East Cary Middle School 2013

Importance of Oceans Remove carbon dioxide from the atmosphere and stores it. Provide oxygen to the atmosphere. Are home to many species of animals and plants and many complex food webs. Provide food for the human population. Used for travel and shipping. Drilled for oil. Mined for minerals. Recreation.

Why is the Ocean Salty? Salts slowly erode from the Earth’s crust and are carried down rivers into the oceans. Solids and gases from underwater volcanoes dissolve in the sea. Hydrothermal vents on ocean floors bring super heated water with many dissolved minerals back into the sea.

Why is the Ocean Salty? The average salinity of seawater is 35 parts per thousand (ppt). Evaporation and freezing sea ice increases salinity. Rainfall, run-off from land and melting sea ice decreases salinity. Salinity is lower in coastal waters, polar seas and near the mouths of large rivers.

Dissolved Gases in the Ocean Cold water holds more gas then warm water. Lower salinity water holds more gases then higher salinity water. Deep water holds more gas then shallow water.

Dissolved Gases in the Ocean Waves at the ocean surface release gases from the water into the air. Phytoplankton use CO2 to photosynthesize and release O2 into the water. The O2 is used by ocean animals.