Which of the following is an example of chemical weathering?
plant roots growing through rock
water freezing in the cracks of rocks
oxygen reacting with the minerals in rock
rocks breaking from thermal expansion

The correct answer to the question: Which of the following is an example of chemical weathering, would be, C: Oxygen reacting with the minerals in rocks.

Explanation:

Chemical weathering, especially in rocks, is defined as the changes that rocks suffer as they come in contact with water and its chemical components, that through reactions, alter the formation of these rocks. There are several ways in which the contact between water and rocks causes this weathering, one of which is called hydrolysis, which is, the way in which the water and rock minerals combine together to change the structure of rocks, like is the case of  feldspar. Another one is when oxygen combines with the minerals of the rocks, to cause oxidation, which leads to rocks accumulating rust, becoming weakened so they easily break, and acquiring a redish-brown color. This is why the answer is C.

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)

hello,

your answer is ready

i believe its either the first or third option but i'm leaning more towards the third option:

the first excerpt makes a logical appeal, while the second excerpt makes an emotional appeal.

your pal

~papaguy