Sea Floor Spreading Online Activity

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

Sea floor spreading online activity.

Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north. Mantle convection is the slow churning motion of earth s mantle. It is an underwater mountain range that forms when magma pushes up on the crust at a divergent boundary. Most basalt magmas contain abundant molten iron.

Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor. The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. This activity consists of naming the continents identifying mid ocean ridges and determining the age of the ocean floor. A model of seafloor spreading purpose.

Convection currents also recycle lithospheric materials back to the mantle. Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge. Seafloor spreading and other tectonic activity processes are the result of mantle convection. 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. Once you have labeled each map correctly you should be able to answer the series of questions that follow the exercise. As magma starts to harden into rock iron rich minerals solidify first. 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.

This coloring sheet visu. This is a mid ocean ridge. The red line traces the path of the mid atlantic ridge. When a divergent boundary occurs in the ocean seafloor spreading is the result.

We will observe evidence of how the sea floor has spread apart over time. Displaying top 8 worksheets found for activity seafloor spreading. In 1960 harry hess hypothesis about seafloor spreading was a key component of the plate tectonics revolution. Africa south america north.

We call this sea floor spreading. Sea floor spreading answer key. This creates new ocean crust. Seafloor spreading is the movement of magma through a crack in a mid oceanic ridge.

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. Once the basalt cools completely into solid rock the. 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.