The weathering of rocks in Zion and Bryce canyons takes place by both physical and chemical weathering.
<h3>What is weathering?</h3>
- Rocks, soils, minerals, wood, and manmade materials all deteriorate due to weathering when they come into touch with water, air gases, and living things.
- The process of weathering's contribution to soil formation is arguably its most significant feature.
- Weathering comes in three flavors: physical, chemical, and biological.
- Weathering can be facilitated by wind, water, ice, plants, gravity, and temperature variations.
- Things become fragmented via weathering. Erosion is the process through which soil or rock fragments move to new sites.
- Different landforms can alter in size, shape, and texture due to weathering and erosion (such as mountains, riverbeds, beaches, etc).
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Answer:
Shifting cultivation is not included in commercial farming.
Explanation:
There are multiple types of farming, and that is prevailing more and more is commercial farming. This type of farming is characterized by large-scale production, with higher amounts produced in a smaller area, new types of high productivity seeds, use a lot of pesticides, being heavily mechanized, etc. The reason why this type of farming has developed and is becoming dominant is that there has been an exponential rise in food demand because of the growing global population and increase in consumption per capita.
Something that is not used in commercial farming is the shifting cultivation method. This method basically means that every season a new type of crop is planted, thus leaving the soil to recover naturally and restore nutrients needed for when the initial crops are planted again. The commercial farming doesn't use this method because it simply relies on using high amounts of fertilizers, so every season that soil is enriched with nutrients.
The greenhouse effect happens when greenhouse gases are trapped in a close dspace, and cause humidity and heat to rise. This happens outside two, within the atmosphere, and makes icebergs melt . It helps create global warming
After the independence of many African countries (not all, for example, Ethiopia was never really colonized), the countries struggled both politically and economically - even more than before the independence.
A huge reason for that is that the countries were not formed along the ethnic lines, but instead they were divided by the Europeans among themselves, so when the independence was gained, there were many internal conflicts between the ethnicities and religions.
One example for this was the Rwandan Genocide - a result of the conflict between the Hutu and the Tutsi.
The answer is petroleum
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