Which sediments will most likely be deposited first when the stream slows down?
Sediment in rivers gets deposited as the river slows down. Larger, heavier particles like pebbles and sand are deposited first, whilst the lighter silt and clay only settle if the water is almost still.
Is the process by which a glacier loosens and moves rocks?
Glaciers erode the underlying rock by abrasion and plucking. Glacial meltwater seeps into cracks of the underlying rock, the water freezes and pushes pieces of rock outward. The rock is then plucked out and carried away by the flowing ice of the moving glacier (Figure below).
What is the name of the process where surface materials are dropped by an erosional agent like water or wind?
erosion
What is the most powerful agent of erosion?
Moving water
What are the 7 agents of mechanical weathering?
Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.
Which are the best agents of chemical weathering?
Water is the most important agent of chemical weathering. Two other important agents of chemical weathering are carbon dioxide and oxygen.
How does biological weathering break down rocks?
Biological weathering is weathering caused by plants and animals. Plants and animals release acid forming chemicals that cause weathering and also contribute to the breaking down of rocks and landforms.
What will happen if rocks will not undergo weathering?
Without weathering, geologic features would build up but would be less likely to break down. Weathering is the process that changes solid rock into sediments. Sediments were described in the Rocks chapter. With weathering, rock is disintegrated.
What type of weathering is acid rain?
Chemical weathering
What happens to rocks through oxidation?
Oxidation is another kind of chemical weathering that occurs when oxygen combines with another substance and creates compounds called oxides. When rocks, particularly those with iron in them, are exposed to air and water, the iron undergoes oxidation, which can weaken the rocks and make them crumble.
What is the most common Most major agent of erosion on Earth?
Water
What rocks are affected by oxidation?
Oxidation and hydration: Oxidation produces iron oxide minerals (hematite and limonite) in well aerated soils, usually in the presence of water. Pyroxene, amphibole, magnetite, pyrite, and olivine are most susceptible to oxidation because they have high iron content.