Sea Floor Spreading Activity

As magma starts to harden into rock iron rich minerals solidify first. The idea that the seafloor itself moves. Keith meldahl 240 732 views.

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Sea floor spreading activity. A model of seafloor spreading purpose. The old crust gets pushed to the side as new crust is formed. This is a mid ocean ridge. Learning objectives students will be able to.

They will also model sea floor spreading at a spreading center such as the mid atlantic ridge. Sea floor spreading activity jessica henze. Most basalt magmas contain abundant molten iron. Once the basalt cools completely into solid rock the alignment of the iron minerals is fixed.

Plot data on a diagram. Subscribe subscribed unsubscribe 238. Subduction and sea floor spreading are processes that could alter the size and form of the ocean. Seafloor spreading is a process that occurs at mid ocean ridges where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.

Seafloor spreading is happening at b. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north. The theory of why this occurs states that when the rocks are being formed from lava at the mid atlantic ridge they harden and cool taking on the magnetic polarity of the earth. Magnetic reversals and sea floor spreading duration.

The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. Worksheets are sea floor spreading work sea floor spreading a model of seafloor spreading inside earth work magnetic reversals activity name date sea floor spreading l 1 2 3 5 4 ovr l lesson 3 seafloor profiling seafloor spreading and subduction. Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge. Students will use actual data from historic oceanographic cruises to examine sea floor spreading.

Plate tectonics and the sea floor activity. For instance the atlantic ocean is believed to be expanding because of its few trenches. The fascinating thing about the rocks are that the magnetic alignments change and reverse polarity at times. Sea floor spreading plate tectonic evidence alexandria cellucci.

Unsubscribe from jessica henze. Activity of the month june 2008 plate tectonics and contributions from scientific ocean drilling summary in this activity. Due to this continuous seafloor spreading occurs and makes atlantic ocean floor to be connected to other continental crust making the ocean gets wider over the time. Earlier theories by alfred wegener and alexander du toit of continental drift postulated that continents in motion plowed through the fixed and immovable seafloor.

Give each student or. It is an underwater mountain range that forms when magma pushes up on the crust at a divergent boundary. Displaying all worksheets related to activity seafloor spreading. Sea floor spreading 2 mid atlantic ridge that mirror each other.

This creates new ocean crust. Model of seafloor spreading templates one with three straight lines and another with striped bands or striped bands with arrows colored pencils or crayons scissors transparent tape procedures. Unsubscribe from alexandria cellucci.