Ocean Currents Science 8.

Slides:

Advertisements

Similar presentations

Ocean Currents.

Advertisements

Notes on “Ocean Currents”

Unit 10 Lesson 5 Ocean Currents

Ocean Currents Beth Roland Jacobs Fork Middle School Team 5 Mountaineers.

Grade Eight Science Chapter Two. An ocean current is a large mass of moving water in the ocean. A current moves in one, unchanging direction. There are.

Oceanography Ocean Currents

Chapter 7-2 Ocean Currents and Climate. What are currents and how do they affect us? Surface Currents: Are rivers of water moving through the ocean. –

Ocean Currents “Rivers in the Ocean”. Currents Current – a large stream of moving water that flows through the ocean. Capable of moving large amounts.

6th Grade Earth Science Sutton Middle School

Ocean Currents.

Ocean Currents.

DO NOW From what you learned and observed in the density investigation, hypothesize what you think happens in the red areas on the map shown, and why you.

Ocean Currents.

Surface Currents Movement of water that flow in the upper part of the ocean’s surface.

Ocean Currents.

Oceanography Ocean Currents Chapter 24.1 and 24.2.

Atmospheric movements We learned that energy is transferred from the Sun to the Earth creating convection currents. But, what type of currents???

*Refer to Chapter 11 in your Textbook. Learning Goals: 1. I can differentiate between the various types of ocean currents. 2. I can describe the effect.

Ocean Circulation – Ch Ag Earth Science – Chapter 15.2.

Motion in the Ocean.

What are ocean currents?

Question of the Day Question: If you heat up a liquid, like water in a fish tank, can it hold more oxygen or less? How do you know? Answer: ……… Turn In:

Ocean Currents p. 36 Ocean waters are constantly on the move. How they move influences climate and living conditions for plants and animals, even on land.

An ocean current can be defined as any continuous flow of water along a definite path in the ocean. Ocean currents of the earth.

Ocean Currents. The water in the ocean is constantly moving The water in the ocean is constantly moving Broad bands of ocean water that flow in one direction.

Fact Statements.  Surface currents are mainly caused by prevailing winds.  Their flow is controlled by the winds, Earth’s rotation and location of the.

Ocean Currents. Mass movement or flow of ocean water Mass movement or flow of ocean water River within the ocean River within the ocean Two types Two.

Ocean Circulation Lindsay Innes and Charity Sonier.

Ocean Currents.

Lesson 8: Currents Physical Oceanography

OCEAN SURFACE CURRENTS

Ocean Currents, and El Nino

Ocean Currents.

Ocean Currents.

Module 11 Ocean Currents After reading this module you should be able to describe the patterns of surface ocean circulation. explain the mixing of surface.

16.1 – Ocean Circulation.

Waves, Currents, and Tides

Ocean Currents.

Chapter 16.1 Ocean Circulation.

Ocean Currents & Climate

Ocean Currents.

Ocean Circulation 16.1.

Currents and Climate.

Ocean Currents.

Ocean Currents.

OCEAN CURRENTS.

Oceans and Climate Visual Vocabulary.

How surface currents differ from deep ocean currents

Ocean Currents.

Global Currents and Winds

Ocean Currents Ocean water circulates in currents caused by wind and by density differences Currents are the flow of water between areas of different surface.

Module 11 Ocean Currents After reading this module you should be able to Describe the patterns of surface ocean circulation. Explain the mixing of surface.

Ocean Currents.

Ocean Currents Copy all of the writing into your journal as Journal 7- Ocean Notes (you do not need to draw the pictures)

Ocean Currents.

Ocean Motion Vocabulary

Ocean Currents.

Ocean Currents Chapter 16.1

Currents and Climate.

Ocean Currents.

Ocean Currents.

the Oceans - Mr. Parr Currents

Unit 1 Structure and Motion Part 2

Currents and Climate.

Ocean Currents and Climate

Unit 3 Lesson 5 Ocean Currents

Convection The transfer of thermal energy by the movement of particles within matter.

Ocean Currents.

Ocean Currents.

Presentation transcript:

Ocean Currents Science 8

Ocean Currents An ocean current is a large amount of ocean water that moves in a particular unchanging direction. There are more than 20 major ocean currents. Currents can be warm or cold, depending on their origin.

Major Ocean Currents

Two types of ocean currents: surface currents extend to an average depth of 200m occurs in about 10% of the ocean water cover the entire ocean surface Thermohaline currents (thermo = heat and haline = salt) occur deeper than 200m occurs in about 90% of the ocean water

Surface Currents Mostly horizontal currents These are caused by: wind action - currents follow the pattern of the wind the Earth’s spin (Coriolis Effect) - travel clockwise in the northern hemisphere and counterclockwise in the southern hemisphere. shape of the continents - Moving currents are forced to turn when they meet a solid surface.

Wind Action As air moves over the ocean’s surface, its energy is transferred by friction to the water molecules, causing the ocean water to move.

Earth’s spin (Coriolis Effect)

Deep Ocean Currents Thermohaline currents are driven by density and temperature changes in the water. also known as the “Ocean’s conveyor belt” Flows under the surface of the ocean and ocean water moves vertically

Temperature

Ocean’s Conveyor Belt

Local Currents Local ocean currents include: i) Labrador current (cold) ii) Gulf Stream (warm)

Why are Surface Currents Important? Surface currents act as the general “mixing” of the world's oceans and waters Surface currents move nutrients from productive areas to less productive areas of the world's oceans. Also important in migration and movement of many less active (or passive) organisms.

Why are Deep Currents Important? Create “upwells” Upwells: the movement of water from the much deeper water to shallow waters throughout the Ocean This makes sure all ocean nutrients do not end up settling on the bottom of the ocean. This mixing makes it so surface organisms can sustain life.

Conclusion: What are the major differences between surface and deep ocean currents? Why are ocean currents important?