Summary
Highlights
Tutor Riner welcomes viewers to the DepEd ETCH Unit's online tutorial for Science 10, marking the beginning of the school year 2021-2022. He introduces himself and fellow tutor, Tutor Echad, who will be joining in future sessions. The tutorial is live on Facebook and YouTube channels.
Tutor Riner begins the main lesson on Science 10, Quarter 1, Week 1, titled 'Lithosphere: The Rocky Skin of Earth'. He acknowledges the instructional materials used, including self-learning modules from the Central Office and Caloocan Division. The most essential learning competency is to describe the relationship and distribution of active volcanoes, earthquake epicenters, and major mountain belts to the plate tectonic theory.
The learning goals for the session are to describe the Earth's lithosphere, differentiate oceanic and continental crusts, infer that the Earth's lithosphere is divided into plates, and identify major lithospheric plates. A pretest is administered with five multiple-choice questions to assess prior knowledge.
A 'Looking Back' activity follows the pretest, where learners identify geological concepts based on textual clues. This includes terms like 'earthquake', 'Pangaea', 'continental drift', 'seismic waves', and 'volcano'.
The lesson delves into the definition of the lithosphere, derived from Greek words 'lito' (stone) and 'sphyra' (ball). It is explained as being composed of the crust and upper mantle, floating on the semi-plastic asthenosphere. The movement of the lithosphere is called tectonics, forming tectonic plates and plate boundaries.
The video identifies seven major tectonic plates: Eurasian, North American, South American, Antarctic, Pacific, Indo-Australian, and African plates. It also mentions several secondary or minor plates such as Nazca, Philippine, and Cocos plates.
A detailed comparison between oceanic and continental plates is provided, covering their association with oceanic crust vs. exposed land masses, average thickness (oceanic is thinner), density (oceanic is denser), age (continental is older), and rock composition (basaltic for oceanic, granitic for continental).
An activity requires learners to fill a table comparing oceanic and continental lithospheres based on relative age, thickness, density, and rock composition. Guided questions reinforce these differences, such as identifying which lithosphere is older, thinner, and denser.
Learners classify major lithospheric plates as primary or secondary, reviewing the previously discussed major and minor plates. This section serves to consolidate understanding of global plate distribution.
A five-question post-test is given to assess the learning outcomes. The questions cover the composition of the lithosphere, definition of plates, characteristics of continental lithosphere, identification of secondary lithospheric plates, and the location of the 'ring of volcano'. The session concludes with an announcement about the National Science Club Month webinar series.