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sciences test 2018
| Question | Answer |
|---|---|
| what is density | Describes how closely packed together the particles are in a substance |
| the formula for density | mass divided by volume |
| the unit for measurement the density of a liquid | grams per milliliters |
| the unit of measurement for the density of a solid | grams per cubic centimeters |
| The unit of measurement for density of a gas | kilograms per litre |
| what is a solid | solid hold a defined shape because of their particles are packed closely together and vibrate and move into one place |
| what is a liquid | a liquid can flow and Take Shape of their container because the particles have partly overcome their attraction for one another |
| what is a gas | a gas can flow and spread out because their particles are far apart and have overcome their attraction to one another |
| Define dissolving | when a substance is placed into a fluid the substance particles are more attracted to the fluid particles then the substance particles can move further apart |
| What is mass | a matter of a substance |
| what is matter | anything that has mass and volume |
| what is volume | the amount of space that a substance |
| what is a slurry | a mixture of water and solids that flows |
| What is a fluid | a fluid is a substance that flows has many uses includes holding a transporting other materials |
| what is the particle theory of matter | a way to explain the behavior of matter |
| what is viscosity | the resistance of a fluid to flow fluids with high viscosity do not flow as easily as fluids was low viscosity |
| why does temperature have a big effect on viscosity | the viscosity of a fluid can change as the fluid is heated up or cool down as the temperature of a liquid increases the viscosity decreases as the temperature of a liquid decreases the particles slow down and result of the viscosity increasing |
| What happens when the temperature of a gas decreases | As the temperature of a gas decreases the particles slow down and Collide less often So there is less friction which is a result of the viscosity decreasing the cooler the gas the faster it flows what is friction |
| what is friction | friction is a force that works to slow down the motion as a result of the surfaces rubbing against each other the greater the friction or rubbing between the particles of any fluid the higher the viscosity |
| what is the flow rate | measurement of the speed at which the fluid flows from one point to another. determined by the measurement of the amount of fluid that flows past a given point at a given time the greater the fluid that flows past a given point the higher the viscosity |
| what is buoyancy | buoyancy is the tendency of an object in a fluid to rise or sink due to the density differences with its surroundings. |
| what is the plimsoll line | shows how heavy a ship can safely load in different water conditions |
| What is a force | a force is a push or pull that acts on an object for example weight is the amount of a downward pull on an object due to the force of gravity |
| what is pressure | is the amount of force applied to a given area |
Created by:
huntermaclean55
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