Question

homework erosion and weathering ms 112 name cadence schrag date

1. explain the difference and relationship between erosion and weathering?
2. what factors control weather?
3. if the na for sea salt is from land, where did it come from, briefly explain the process.
4. list the following minerals from stable to least stable (quartz. pyroxenes. calcite, biotite moica, iron oxides. olivine)
5. explain why this sedimentary rock is red?

Explanation:

1. Weathering is the breakdown of rocks at their location through physical, chemical, or biological processes. Erosion is the movement of the weathered - material by agents like water, wind, or ice. Relationship: Weathering provides the material for erosion.
2. Factors controlling weather include solar radiation (heating the Earth's surface and driving atmospheric circulation), humidity (amount of water vapor in the air), topography (elevation and land - form features can affect wind and precipitation patterns), and air masses (different air masses have different temperature and moisture characteristics).
3. Sodium in sea salt from land comes from the weathering of rocks. Minerals in rocks that contain sodium, such as feldspars, are weathered by chemical processes like hydrolysis. Rainwater and other water sources dissolve the sodium - containing compounds, and the water then carries the dissolved sodium to rivers, which eventually empty into the ocean.
4. Minerals from most stable to least stable: Quartz, iron oxides, biotite mica, calcite, pyroxenes, olivine. Quartz is highly resistant to weathering due to its strong chemical bonds. Iron oxides form under oxidizing conditions and are relatively stable. Biotite mica is more weatherable than quartz but more stable than some of the others. Calcite is soluble in acidic water. Pyroxenes and olivine are less stable because they react more readily with water and oxygen due to their chemical composition.
5. Sedimentary rock is red usually due to the presence of iron oxides, mainly hematite. Iron in the rock undergoes oxidation in the presence of oxygen and water, forming iron - oxide compounds that give the rock its red color.

Answer:

1. Weathering breaks rocks in place; erosion moves weathered material. Weathering supplies material for erosion.
2. Solar radiation, humidity, topography, air masses.
3. From weathering of sodium - containing rocks like feldspars. Chemical weathering dissolves sodium compounds, carried by water to the ocean.
4. Quartz, iron oxides, biotite mica, calcite, pyroxenes, olivine.
5. Due to presence of iron oxides like hematite from iron oxidation.