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science6.1-3
8th grade science:physical sceince
| Question | Answer |
|---|---|
| the pressure caused by the weight of the atmosphere | atmospheric pressure |
| a nonsolid state of matter in which atoms or molecules are free to move past each other, as in a gas or liquid | fluid |
| the amount of force exerted per unit area of a surface | pressure |
| the SI unit of pressure | pascal |
| the upward force that keeps an object immersed in or floating on a liquid | buoyant force |
| the principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces | Archimedes' principle |
| the principle that states that the pressure in a fluid decreases as the fluid's velocity increases | Bernoulli's principle |
| which principle cam explain how a hydraulic device works | Pascals principle |
| which principle could you use to determine if an object will float in water | Archimedes principle |
| which principle can help explain how a bird flies | Bernoullis principle |
| what will happen if the buoyant on an object is greater than the weight of the object | the object will be pushed out of the fluid(buoyed up) |
| as a person climbs a mountain, the atmospheric pressure he or she feels will | decrease |
| a bicycle tire goes flat if it has a hole because the air inside the tire is | at a higher pressure than the air outside the tire |
| aluminum has a higher density than water, but an empty aluminum can floats in water.why does the can float | the air inside the can makes the overall density of the can less than the density of water |
| which of the following affect the flight of an airplane | drag,lift,thrust |
| how is lift created around the wing of an airplane | faster-moving air above the wing creates an area of low pressure above the wing |
| how does the water pressure change as you dive farther underwater | it increases |
| the SI unit for pressure is called______ and is equal to 1 N/m2 | Pascal |
| presssure can be calculated by dividing force by ______ | area |
| the upward force exerted by fluids on matter is called the ____________ | buoyant force |
| submarines and some fish can control their depth underwater by changing their________ | density |
| the upward force that keeps planes and birds aloft is called______ | lift |
Created by:
xxlizzylouxx22
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