Science exam 8.3-9.3 Word Scramble
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Question | Answer |
___________ is a fluid's resistance to flow(how difficult it is for fluid to flow) | Viscosity |
If a fluid is thick, the viscosity is: | greater, flows slower |
The ____________ is the speed at which a liquid flows | flow rate |
when _________ the particles in a substance move further apart | heated |
when gasses are heated the viscosity of the gas _________ | increases |
when liquids are heated, the viscosity of the liquid _______ | decreases |
_____________ is the property of fluids that makes the particles hold together because they are attracted to each other | cohesion |
_____________ is the effect that the particles at the surface attract each other and form a "skin" | surface tension |
___________ is the attraction between particles of a fluid and another substance so that the fluid clings to it | adhesion |
in a gas or a liquid, the deeper you go, the ______ the pressure is | greater |
in a gas or a liquid, the deeper you go, the greater the pressure is because | there is more air or liquid above the point pushing down |
because of all the air in the atmosphere, the pressure at sea level is a little more than: | 100kPa |
100kPa is called: | one atmosphere |
the ____________ you go in a gas or a liquid, the less pressure there is | higher |
for every 10m deeper in water, the pressure increases by: | 1 atmosphere |
________ is the tendency for objects to rise or float in a fluid | buoyancy |
buoyancy occurs because: | differences in density of the object and the fluid |
______________ is the force of the fluid pushing up on the object | buoyant force |
hot air rises because of buoyant force on the hotter air. this process is called: | convection |
ovjects float or sink based on: | whether the buoyant force is greater or less than the gravitational force |
when pressure is applied at one point in a fluid in an enclosed system, that pressure is transmitted _____ thoughout the entire system. | qually |
when pressure is applied at one point in a fluid in an enclosed system, that pressure is transmitted equally thoughout the entire system. called: | static pressure |
________ is the sideways pressure exerted by a fluid in motion | dynamic pressure |
as the speed of a fluid increases, the dynamic pressure __________ | decreases |
________________ are systems that use pressure in liquids to do work | Hydraulic systems |
(true or false) since liquids aren't normally compressible, applying a force to a liquid transmits the force along the liquid | True |
2 important parts of hydraulic systems are _____ and _____ | pumps and valves |
what do pumps do in the hydraulic system? | put the liquid under pressure |
what do valves do in the hydraulic system? | control the passage of the liquid through a pipe |
Hydraulic systems can also be used to: | multiply the force exerted by a liquid |
_____________ are systems that use pressure in gases to do work | pneumatic systems |
since gases can be compressed, pneumatic systems use ______ | compressors |
the gas is compressed and then when the pressure is released, the expansion of the gas causes: | a short burst of strong, steady force to do work |
common problems in pneumatic systems are: | 1. loss of pressure due to leaks in the system 2. reduction of the gas flow due to blockage of the passageway |
The ________ transports blood throughout the body | circulatory system |
the _____ is the pump which moves the blood through the blood vessels | heart |
the blood is kept under pressure to move it to all parts of the body. each beat _____ the pressure, and then it falls again before the next beat | inreases |
blood pressure is measured with a : | sphygmomanometer |
blockages in the vessles cause increased pressure, which can cause them to: | burst |
the ______ brings air into the body and removes corbon dioxide from the body | respiratory system |
_____ changes the air pressure to make the air move | breathing |
when you inhale, the increased space _____ the air pressure inside your lungs, so the higher pressure outside pushes air in | reduces |
when you exhale, the _____ and ribs compress the air in your lungs and so it is pushed out of the body | diaphragm |
infections and diseases such as asthma _____ the air passages, resulting in difficulty breathing | narrows |
when you breathe in: | the diaphragm moves down and the chest cavity expands |
when you breathe out: | the diaphragm moves up and the chest cavity contracts |
Created by:
jlarose
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