Sea Floor Spreading Model Cut Out

Subduction and sea floor spreading are processes that could alter the size and form of the ocean.

Sea floor spreading model cut out.

The base is best if made from poster board or card stock. This model represents the flow of lava over time due to plate tectonics at mid oceanic ridges seafloor spreading. To create a working model of sea floor spreading follow the model seen below figure 1. Cut out a piece of stiff cardboard eg.

Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor. 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. Please refer to the picture as you build this model. Place a piece of white paper on the cardboard and cut the paper so that flaps of paper can be pulled.

The strips of paper represent oceanic crust or seafloor. For instance the atlantic ocean is believed to be expanding because of its few trenches. The center slit represents a mid ocean ridge 2. 3 slits as shown here.

Cut slits in the cardboard each about 2 mm wide as shown eg. Create a model of the spreading sea floor. Going to consider how we might make a model that would explain or demonstrate sea floor spreading. Think pair share turn and talk to your elbow partner.

White 8 x 11 in. Cut out the labels approximately 1 tall by 1 2 wide. Take a cardboard cylinder shaped container such as a quaker oats container and cut a vertical slit about 3 inches long and inch wide down the side. 25 x 35 cm.

This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. The width and length of the base are not critical as long as they are at least 12 cm wide and 30 cm long. The oldest sections should be the sections on both sides furthest from the middle 4. You may wish to cut the paper model pieces for the students ahead of time or use a model you have made as a demonstration for the class.

The 4 tactile surfaces will represent rock of various ages depending on how long ago it was laid down. The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american. Cut 3 slits each slightly more than 8 cm wide. Seafloor spreading is the creation of new seafloor or new oceanic crust 5.

The earth does not get bigger. Use the model to show them the creation of new sea floor at spreading centers and the disappearance of old sea floor at subduction zones. Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them.