Geology by https://padlet.com/ganaallah_20156/h4tq6liv60rw Grade11/first semester tasks en-us 2019-01-17 17:21:09 UTC 2023-03-29 22:43:28 UTC hello@padlet.com 1)Landslides ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321807937 refers only to mass movements, where there is a distinct zone of weakness that separates the slide material from more stable underlying material.
-Landslides are exceptionally destructive. Homes may be destroyed as hillsides collapse. Landslides can even bury entire villages. 
-they may create lakes when the rocky material dams a stream. If a landslide flows into a lake or bay, they can trigger a tsunami]]> 2019-01-17 17:34:43 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321807937 2)Falls ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321813188 Falls are abrupt movements of masses of geologic materials, such as rocks and boulders, that become detached from steep slopes or cliffs. 
-Separation occurs along discontinuities such as fractures, joints, and bedding planes, and movement occurs by free-fall, bouncing, and rolling.
-Falls are strongly influenced by gravity, mechanical weathering, and the presence of interstitial water.]]> 2019-01-17 17:42:36 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321813188 3)Lahars and Mudflow ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321817264 Added water creates natural hazards produced by gravity.
-On hillsides with soils rich in clay, little rain, and not much vegetation to hold the soil in place, a time of high precipitation will create a mudflow. 
-Mudflows follow river channels, washing out bridges, trees, and homes that are in their path.
-A lahar is mudflow that flows down a composite volcano (figure 6). Ash mixes with snow and ice melted by the eruption to produce hot, fast-moving flows. The lahar caused by the eruption of Nevado del Ruiz in Columbia in 1985 killed more than 23,000 people.]]> 2019-01-17 17:49:40 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321817264 4)Slumps ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321819380 Less dramatic types of downslope movement move earth materials slowly down a hillside.
-Slump moves materials as a large block along a curved surface.
-Slumps often happen when a slope is undercut, with no support for the overlying materials, or when too much weight is added to an unstable slope.

]]> 2019-01-17 17:53:26 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321819380 5)Creep ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321820546 Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock. Movement is caused by shear stress sufficient to produce permanent deformation, but too small to produce shear failure. There are generally three types of creep:
  1. Seasonal, where movement is within the depth of soil affected by seasonal changes in soil moisture and soil temperature.
  2. Continuous, where shear stress continuously exceeds the strength of the material.
  3. Progressive, where slopes are reaching the point of failure as other types of mass movements. Creep is indicated by curved tree trunks, bent fences or retaining walls, tilted poles or fences, and small soil ripples or ridges.
Curves in tree trunks indicate creep because the base of the tree is moving downslope while the top is trying to grow straight up . Tilted telephone or power company poles are also signs of creep.
]]> 2019-01-17 17:55:36 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321820546 High gradient stream ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321827888 A high gradient indicates a steep slope and rapid flow of water (i.e. more ability to erode)
-High gradient streams tend to have steep, narrow V-shaped valleys, and are referred to as young streams. ]]> 2019-01-17 18:08:44 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321827888 Low gradient stream ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321828052 a low gradient indicates a more nearly level stream bed and sluggishly moving water, that may be able to carry only small amounts of very fine sediment.
-Low gradient streams have wider and less rugged valleys, with a tendency for the stream to meander. ]]> 2019-01-17 18:08:59 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321828052 Q1 ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321834473 Which of the following soil compositions is a clay?
a)70 percent clay, 30 percent silt, 0 percent sand
b)30 percent clay, 10 percent silt, 60 percent sand
c)15 percent clay, 25 percent silt, 60 percent sand.
D) 30 percent clay, 65 percent silt, 5 percent sand
Answer a

]]> 2019-01-17 18:19:17 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321834473 Q2 ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321840275 What is the texture of a soil that gives a fair ribbon and has almost no gritty particles?
Answer: Silty clay loam]]> 2019-01-17 18:27:08 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321840275 Q3 ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321844338  What are the characteristics of a clay loam soil?
A clay loam soil has a good water holding capacity and a good nutrient holding capacity. Its permeability and aeration may be somewhat restricted.]]> 2019-01-17 18:33:37 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321844338 confined aquifer ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321853308 A confined aquifer is an aquifer below the land surface that is saturated with water. Layers of impermeable material are both above and below the aquifer, causing it to be under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer. ]]> 2019-01-17 18:48:12 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321853308 unconfined aquifer ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321854634 A water-table or unconfined aquifer is an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall. Water-table aquifers are usually closer to the Earth's surface than confined aquifers are, and as such are impacted by drought conditions sooner than confined aquifers.]]> 2019-01-17 18:50:06 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321854634 water cycle discribtion ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321864638 It is the continuous movement of water on, above and below the surface of the Earth.
-The mass of water on Earth remains fairly constant over time but the partitioning of the water into the major reservoirs of ice, fresh water, saline water and atmospheric water is variable depending on a wide range of climatic variables.
-The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different forms: liquid, solid (ice) and vapor.
-The water cycle involves the exchange of energy, which leads to temperature changes. When water evaporates, it takes up energy from its surroundings and cools the environment. When it condenses, it releases energy and warms the environment. These heat exchanges influence climate.]]> 2019-01-17 19:06:16 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321864638 Domestic Purposes ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321870326 cooking
drinking
bathing
washing]]> 2019-01-17 19:15:33 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321870326 Agricultural Purposes ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321870631 farming 
gardening fisheries]]> 2019-01-17 19:16:09 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321870631 Industrial Purposes ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321871147 manufacturing
cooling systems]]> 2019-01-17 19:17:01 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321871147 Recreation ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321871565 swimming
rafting
boating]]> 2019-01-17 19:17:46 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321871565 water percentage for every demand ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321872571 2019-01-17 19:19:27 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321872571 water cycle mind map ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321878392 2019-01-17 19:29:01 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321878392 UV water purification ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321882376 Aging infrastructure in many cities can lead to an increase in possible contamination. Ultraviolet technology can give peace of mind, knowing that you’re protected from many of the culprits of water contamination. A UV water purification system effectively destroys 99.9% of waterborne microorganisms. In this section, we explore the advantages and disadvantages of ultraviolet, the parts of a UV system, and frequently asked questions about UV water purification. ]]> 2019-01-17 19:36:24 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321882376 Ultrafiltration ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321883875 Ultrafiltration (UF) is used to remove essentially all colloidal particles (0.001 to 1.0 microns) from water and some of the largest dissolved contaminants. The pore size in a UF membrane is mainly responsible for determining the type and size of contaminants removed. In general, membrane pores range in size from 0.005 to 0.1 micron as shown in fig (1.4.4). UF membrane manufacturers classify each UF product as having a specific molecular weight cutoff (MWC), which is a rough measurement of the size of contaminants removed by a given UF membrane. ]]> 2019-01-17 19:39:05 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321883875 Anaerobic Treatment ganaallah_20156 https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321885633 anaerobic treatment uses bacteria to help organic material deteriorate in an oxygen-free environment. Lagoons and septic tanks are among the various anaerobic treatment methods. The best known anaerobic treatment is anaerobic digestion, which is used for treating food and beverage manufacturing effluents, as well as municipal wastewater, chemical effluent, and agricultural waste treatment. ]]> 2019-01-17 19:42:13 UTC https://padlet.com/ganaallah_20156/h4tq6liv60rw/wish/321885633