The External Processes: Exogenic Processes

        From minerals to rocks, we move on to these Exogenic Processes! I was very delighted to start this lesson as here, we were about to conduct our first experiment as a Senior High student! Nevertheless, let's go back to what I have learned!

        We learned that Exogenic Processes include the following: (1) Weathering, (2) Erosion, (3) Transport, (4) Deposition, and (5) Mass Wasting. Let’s break them down:

        1. Weathering refers to a process of breaking down rocks into small particles such as sand, clay, gravel, and other fragments. It is divided into three kinds, mechanical (physical), chemical weathering, and biological weathering. Mechanical weathering is the physical breakup of rocks into small pieces and fragments with no change in the chemistry of the parent rock. Abrasion and frost wedges are examples of this weathering. On the other hand, chemical weathering changes the composition of rocks, transforming them to create various minerals. hydrolysis, oxidation, and, dissolution are examples of this kind of weathering. Meanwhile, biological weathering is caused by human activities or plants and animals.

        2. Erosion the movement of the broken pieces away from the site of weathering. It has three agents that wear at the surface of the earth: water, wind, and ice.

        3. Transport is about the movement of those eroded rocks and soils. Rocks that move in rivers often bash with each other, wearing each other away.

        4. Deposition happens when the transported materials settle down. It happens in low-lying areas such as the bottom of lakes and oceans, base of hills / mountains, river deltas and end of glaciers.

        5. Mass Wasting has 4 types: Landslides, avalanches, rock falls, and creep. Akin to transport, but only happens along a slope due mainly to the action of gravity.

        Additional sources of the exogenous processes includes the sun, moon, comets, asteroids, and meteors.

        To conclude this lesson, we conducted an experiment in which we were tasked with the Chalk and Vinegar experiment. We noticed that after we had submerged the chalk in the Vinegar, the Chalk fizzled, a sign of reaction! We took some photos as shown below the experiment that we have conducted:

    

        Sadly, this was the first and only experiment we conducted in the first quarter of ELS. I hope to conduct more for our learning as experiments are a fun way to apply these phenomena in the real world in our own eyes! That's all and untile next time, Ad Astra!