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| The atmospheric pressure at sea level is 101.3 kPa, also called one atmosphere. For every 10 m you descend into water , the pressure increases by one atmoshpere. |
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| Buoyancy is the tendency for objects to rise or float in a fluid |
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| Buoyant force is the force that pushes up on the objects in a fluid.If the buoyant force is greater than the force of gravity, he object rises or floats. |
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| Convection is a vertical movement of fluids caused by density differences. These movements cause heat to be distributed evenly throughout the fluid. |
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| A fluid in motion has dynamic pressure, which energy that can be used directly to preform tasks. Dynamic pressure can also be used indirectly to preform tasks. |
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| Hydraulics/ Hydraulic systems |
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Definition
| Hydraulics is the study of pressure in liquids. Hydraulic systems are devices that create pressure that moves through a liquid such as oil or water. |
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| A valve is a device for controlling the passage of fluid through a pipe. When the valve is closed it stops the flow of the fluid. When the valve is open the fluid can flow through. Check valves only allow fluids to flow in one direction. |
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| In hydraulic multiplication an incompressible fluid increases and transmits a force from one point to another. This method is used to lift up cars for repair. |
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| Pneumatics/ Pneumatic Systems |
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Definition
| Pneumatics is the use of gas in an enclosed system under pressure. In pneumatic systems, an enclosed gas transmits a force, causing motion. |
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Definition
| The circulatory system transports blood around the body.The blood vessels are like pipelines that carry blood to all parts of the body. The heart is the pump. It keeps the blood moving throughout the blood vessels. |
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| Blood pressure is the force of the blood on the walls of the blood vessels. |
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| Disorders of Blood Circulation |
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Definition
1. High blood pressure means that your arteries is clogged or contracted and your heart must work harder to keep blood flowing. High blood pressure can cause arteries to harden and burst.
2.Low blood pressure means that not enough blood is flowing through your arteries. This could be an indication of heart problems or low water levels in the body. |
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Definition
| The respiratory system is the set of organs and pathways involved in breathing. Breathing is partly the result of changes in air pressure. |
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| The diaphragm is a sheet of muscle in the lower chest that moves downwards as you breathe in. |
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Definition
| Asthma is a disease of the respiratory system that interferes with the normal flow of air into the lungs. Asthma attacks can be caused by many things like cold air, dust, exercise, and stress. Asthma attacks cause the pathways to narrow making it difficult to breathe. |
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Definition
| A sphygmomanometer measures blood pressure by applying enough pressure to an artery in your arm to briefly stop the flow of blood. The doctor listens carefully with a stethoscope as the pressure of the sphygmomanometer is released. |
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Term
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Definition
| Static pressure is the pressure of a fluid on a body when the body is at rest relative to the fluid. Squeezing an enclosed fluid creates static pressure. |
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