A glowing globe slowly rotates to reveal a single landmass, Pangea, cradled by one vast ocean. Cracks of light trace fault lines as the land gently tears apart, drifting into Laurasia and Gondwanaland. Bilingual labels in English and Chichewa fade in over moving plates, with soft convection currents rippling beneath the crust in warm earth tones.
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Use information to make animated visuals and explanations in realistic unforgettable to a student visuals. show correct maps and use English and Chichewa to explain to stuents in malawi who have no access to labs books and visuals and this is their only tutor. Continental drift theory Continental drift refers to the idea that earth’s continents have moved over geologic time relative to each other. This idea was propounded by a German scientist called Alfred Wegner. He proposed that the earth was once a single land mass called Pangea. And that this land mass was surrounded by a single super ocean called Panthalassa. However, the Pangea later split apart due to convectional currents within the upper part of the mantle. Pangea broke up to form two land masses namely Laurasia (Northern continent) and Gondwanaland (Southern continent). Continental theory is a theory that explains how the earth became divided into several continents that are there now.Plate tectonics is the theory that Earth's outer shell is divided into large slabs of solid rock, called “plates,” that glide over Earth's mantle, the rocky inner layer above Earth's core. Earth's solid outer layer, which includes the crust and the uppermost mantle, is called the lithosphere.Explanation: A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest. Plate thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere (for example, the interior parts of North and South America). How do these massive slabs of solid rock float despite their tremendous weight? The answer lies in the composition of the rocks. Continental crust is composed of granitic rocks which are made up of relatively lightweight minerals such as quartz and feldspar. By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier. The variations in plate thickness are nature's way of partly compensating for the imbalance in the weight and density of the two types of crust. Because continental rocks are much lighter, the crust under the continents is much thicker (as much as 100 km) whereas the crust under the oceans is generally only about 5 km thick. Like icebergs, only the tips of which are visible above water, continents have deep "roots" to support their elevations. Most of the boundaries between individual plates cannot be seen, because they are hidden beneath the oceans. Yet oceanic plate boundaries can be mapped accurately from outer space by measurements from GEOSAT satellites. Explanation: The theory of continental drift suggests that all the land masses on earth were once part of one supercontinent. Plate tectonics is the ability to measure the movement of land masses. The continental drift is a theory advanced by Alfred Wagener, based on earlier work by many others; it states that all the landmasses were closely positioned to create large landmasses known as Pangaea. Pangaea broke into several smaller land masses, which we now call the continents, and moved along the earth`s surface to the positions we see today. Earlier this theory was not accepted. Plate tectonics is a general theory based on the modern findings in geophysics of the 20th century; it states that the earth’s crust is located on top of a viscous and mechanically weak layer; therefore, allowing the crust to move. The crust moves due to convective forces generated within the asthenosphere, fueled by the internal heat of the earth’s core. Continental drift theory considered the geological scenario of Pangaea breaking to form the present day continents. Plate tectonics suggest that supercontinents like Pangaea existed before too. It also predicts the earth`s land mass will again form another supercontinent in the future. Plate tectonic explains the mechanism of the motion of the tectonic plates while continental drift theory left this question completely unanswered.: There are some events or activities which occur when shearing or sliding plate movement occurs. Examples of features formed under diverging or spreading plate movement are: Volcanic Islands These features are formed under tensional forces or when plates tend to diverge or move apart on the sea floor. When plates move apart due to tension forces, a vent or hole is made through which magma erupts. This magma erupts up to the sea surface where it cools down Visual direction (unless the brief specifies otherwise): Cinematic motion design: atmospheric color, considered depth and framing, a striking visual reveal. Pace: punchy.