Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science exam 8.3-9.3
1-9 projects that we did
| 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
Popular Physics sets