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# sciences test 2018

QuestionAnswer
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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