Did Kush come from Kush?
Did Kush come from Kush?
The origins of Kush Cannabis are from landrace plants mainly in Afghanistan, Northern Pakistan and North-Western India with the name coming from the Hindu Kush mountain range. “Hindu Kush” strains of Cannabis were taken to the United States in the mid-to-late 1970s and continue to be available there to the present day.
What are the 2 types of strain?
Just like stress, there are two types of strain that a structure can experience: 1. Normal Strain and 2. Shear Strain. When a force acts perpendicular (or “normal”) to the surface of an object, it exerts a normal stress.
Which type of strain occurs immediately?
An acute muscle strain is when your muscle tears suddenly and unexpectedly. Such tears can occur either from injuries or trauma. This can be due to: not warming up properly before physical activity.
What are the 3 types of stress in rock deformation?
Stress is the force applied to a rock and may cause deformation. The three main types of stress are typical of the three types of plate boundaries: compression at convergent boundaries, tension at divergent boundaries, and shear at transform boundaries.
What is the deformation caused by stress?
There are three types of stress: compression, tension, and shear. Stress can cause strain, if it is sufficient to overcome the strength of the object that is under stress. Strain is a change in shape or size resulting from applied forces (deformation). Rocks only strain when placed under stress.
Is brittle deformation reversible?
When a rock is subjected to increasing stress it passes through 3 successive stages of deformation. Elastic Deformation — wherein the strain is reversible. Brittle materials have a small or large region of elastic behavior but only a small region of ductile behavior before they fracture.
What are the three types of weathering?
It does not involve the removal of rock material. There are three types of weathering, physical, chemical and biological.
What are the 5 types of physical weathering?
Physical Weathering Processes
- Abrasion: Abrasion is the process by which clasts are broken through direct collisions with other clasts.
- Frost Wedging:
- Biological Activity/Root Wedging:
- Salt Crystal Growth:
- Thermal Expansion:
- Works Cited.
What is erosion mean?
Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. …
What is the difference between denudation and erosion?
Erosion has been compared with the carpenter’s plane that strips away layer upon layer in the finest shavings, while denudation is the disclosure of what is often called a new erosion surface. One may say that a karst is an eroded landscape, but not necessarily a denuded one.
What are the four stages of denudation?
Denudation can involve the removal of both solid particles and dissolved material. These include sub-processes of cryofracture, insolation weathering, slaking, salt weathering, bioturbation and anthropogenic impacts.
What are the four agents of denudation?
Water is one of the four active agents of denudation (the others being wind, waves and glacial ice) that erode, transport and deposit sediments at the earth’s surface to produce erosional and depositional landform.
What are the 5 geomorphic processes?
Learner Resource 5: Geomorphic Processes – Starting point!
- Slumping and Mass Movement.
- OCR Resources: the small print.
What is a geomorphological process?
Geomorphology is the study of the nature and origin of landforms, particularly of the formative processes of weathering and erosion that occur in the atmosphere and hydrosphere. These processes continually shape the Earth’s surface, and generate the sediments that circulate in the Rock Cycle.
What are the two types of geomorphic process?
bringing about changes in the configuration of the surface of the earth are known as geomorphic processes. Diastrophism and volcanism are endogenic geomorphic processes. These have already been discussed in brief in the preceding unit. Weathering, mass wasting, erosion and deposition are exogenic geomorphic processes.