1 Slowness-bradykinesia (slow movement) and akinesia (inability to move) are common in people with Parkinson's disease. 2  This is a hypokinetic disorder characterized by hypokinesia or akinesia, rigidity, and a rhythmic fine tremor at the rate of 3-6 cycles per second. Slowness-bradykinesia (slow movement) and akinesia (inability to move) are common in people with Parkinson's disease. 2  This is a hypokinetic disorder characterized by hypokinesia or akinesia, rigidity, and a rhythmic fine tremor at the rate of 3-6 cycles per second.
The conditions deep in the earth are different enough that these different conditions cause minerals different from those which form at the surface. For example, surface weathering process, which is also a change of the types of minerals causes hard rocks to change into small crumbly pieces.
Environmental Geology - - GEOL 406/506 Rock Strength and Behavior. As you might imagine, natural substances behave according to their internal properties. They are either brittle or ductile, depending on the amount of stress applied. The stress/strain graphs below illustrate the bahavior of materials under stress. THE ONLY WAY TO DETERMINE THE STRENGTH OF A GIVEN MATERIAL IS TO . . . BREAK IT! Elastic Deformation . A brittle substance fails (ruptures) after elastic deformation. An example is a piece of window glass which will bend slightly, then break if enough stress is applied. If stress is released before the glass breaks, it will return to its original shape.