mechanical weathering (by wind or water or perhaps tenacious plant roots or human activities)
Food energy, which is a type of chemical energy.
No one really knows. That is one of the big questions that have yet been answered
That is a physical change. The is no chemical change that takes place when you sharpen your pencil in a standard manner. I suppose if you sharpen it extremely fast, you could catch the pencil on fire, which would then be a chemical change.
Digital cameras use electrical energy stored in the batteries as chemical energy.
Yes, there are 3-4 of them. I prefer 'Circa 1850' for that kind of removal. Available in Rona and Home Depot.
Chemical weathering
Chemical weathering
Chemical weathering changes the composition of a rock by breaking down minerals through chemical reactions with water, oxygen, acids, or other substances. This process can alter the rock's mineral composition, leading to the formation of new minerals or the dissolution of certain minerals.
Chemical weathering causes the mineral composition of a rock to change. This process involves the breakdown of minerals in the rock due to chemical reactions with water, oxygen, or acids in the environment. Over time, these reactions can alter the original minerals into different ones.
Chemical weathering
Physical weathering, such as frost wedging or abrasion, can cause a reduction in the size of bedrock regolith mineral particles without changing their chemical composition. This type of weathering does not alter the minerals themselves, but only breaks them down into smaller fragments.
Weathering can affect various features on Earth's surface, including rock formations, soils, and landscapes. Physical weathering can cause rock formations to break down into smaller pieces, while chemical weathering can alter the composition of rocks and mineral grains. Over time, weathering can contribute to the formation of unique landforms, such as arches, hoodoos, and spires.
One kind of Mechanical Weathering is called ice wedging.
Building a mine underground can cause physical weathering as the excavation process exposes rocks to changes in pressure and temperature, leading to cracking and breaking. It can also induce chemical weathering through interactions with water and air, which can alter the composition of the rocks surrounding the mine. Over time, these weathering processes can weaken the integrity of the mine structures.
Chemical weathering.
chemical weathering
Chemical