Sea Floor Spreading Online Activity

Convection currents carry heat from the lower mantle and core to the lithosphere.

Sea floor spreading online activity.

Seafloor spreading and other tectonic activity processes are the result of mantle convection. Africa south america north. Once you have labeled each map correctly you should be able to answer the series of questions that follow the exercise. We call this sea floor spreading.

This is a mid ocean ridge. A model of seafloor spreading purpose. Seafloor spreading is happening at b. We will observe evidence of how the sea floor has spread apart over time.

This can result in an ever widening seafloor at the. 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. Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge. Most basalt magmas contain abundant molten iron.

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. Displaying top 8 worksheets found for activity seafloor spreading. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north. As magma starts to harden into rock iron rich minerals solidify first.

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. In 1960 harry hess hypothesis about seafloor spreading was a key component of the plate tectonics revolution. This creates new ocean crust. Seafloor spreading is the movement of magma through a crack in a mid oceanic ridge.

This coloring sheet visu. 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. Mantle convection is the slow churning motion of earth s mantle. Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor.

This activity consists of naming the continents identifying mid ocean ridges and determining the age of the ocean floor. Sea floor spreading answer key. The red line traces the path of the mid atlantic ridge. Model of seafloor spreading templates one with three straight lines and another with striped bands or striped bands with arrows colored pencils or crayons.

When a divergent boundary occurs in the ocean seafloor spreading is the result. The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. Once the basalt cools completely into solid rock the.