Sea Floor Spreading Online Activity

Seafloor spreading and other tectonic activity processes are the result of mantle convection.

Sea floor spreading online activity. Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge. This is a mid ocean ridge. This interactive activity is simple to prepare and to execute and allows the students to understand seafloor spreading and the position of newer rock and older rock in relation to. This coloring sheet visu.

Some of the worksheets for this concept 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. Once the basalt cools completely into solid rock the. Seafloor spreading is the movement of magma through a crack in a mid oceanic ridge. Convection currents also recycle lithospheric materials back to the mantle.

Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor. Convection currents carry heat from the lower mantle and core to the lithosphere. This can result in an ever widening seafloor at the. Mantle convection is the slow churning motion of earth s mantle.

The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. In 1960 harry hess hypothesis about seafloor spreading was a key component of the plate tectonics revolution. Seafloor spreading is happening at b. Model of seafloor spreading templates one with three straight lines and another with striped bands or striped bands with arrows colored pencils or crayons.

As magma starts to harden into rock iron rich minerals solidify first. A model of seafloor spreading purpose. When a divergent boundary occurs in the ocean seafloor spreading is the result. We call this sea floor spreading.

Africa south america north. Sea floor spreading answer key. This activity consists of naming the continents identifying mid ocean ridges and determining the age of the ocean floor. Displaying top 8 worksheets found for activity seafloor spreading.

We will observe evidence of how the sea floor has spread apart over time. The process is continuous because forces cause opposite sides of the midocean ridge to constantly move apart making new room for the process to repeat. Most basalt magmas contain abundant molten iron. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north.

It is an underwater mountain range that forms when magma pushes up on the crust at a divergent boundary. Try the activity and explore the reasons why the youngest rocks are located at the ridge and how the sea floor records a history of the magnetism of earth. Seafloor spreading is the process that occurs at mid ocean ridges where new crust is formed through volcanic activity and then gradually moves away from the ridge.