The Particle Theory of Matter
Viscosity is
What is the resistance of a fluid to flow
If the density of a substance is _____ than the density of the fluid, the substance will float.
What is less?
Buoyancy is
the tendency of an object in a fluid to rise or sink due to density differences with its surroundings.
Pressure is
the amount of force applied to a given area .
The particles in gases are
What is farthest spread apart and least attracted to one another.
________ is considered a fluid with a very high viscosity, whereas ________ is considered a fluid with a very low viscosity.
What is honey and water.
You may have noticed that the air in a room is ________ toward the ceiling and _______ toward the floor. The warmer air has a ______ density, so it rises above the cooler, higher density air along the floor.
What is warmer and cooler?
What is lower?
Buoyant force is the
What is the upward force exerted by a fluid.
If a fluid is allowed to move, it will always go from an area of _________ pressure to an area of ________ pressure.
(Hint: it starts with an f)
What is flow.
The greater the __________, or rubbing, between particles in any fluid, the higher the viscosity.
What is friction.
A 2.0 mL sample of oil has a mass of 1.76 g. What is its density?
D = m/v
= 1.76g/2.0 mL
= 0.88g/mL
The state of matter which a substance the least dense.
An example of a substance.
What is gas?
What is oxygen?
Water at the depth of the _______ hole has a ________ pressure on it than water at the higher hole.
What is lower and greater?
Particles are most attracted to each other when
What is when they are in solid form, moving the slowest and closely packed to one another.
Flow rate of a fluid is
a measure of the speed at which a fluid flows from one point to another.
An object will sink in a fluid when:
What is the density of the object is greater than the density of the fluid
An object will float in a fluid when:
What is the buoyant force on the object is equal to the force of gravity on the object
When the temperature is ___________, the particles move __________ and strike the walls of the container more often and with more energy.
What is increased and faster?
The six postulates of the particle theory of matter.
What is
All matter is made up of tiny particles.
All particles are in constant motion
All particles of one substance are identical.
Temperature affects the speed at which particles move.
In liquids and solids, the particles are close together and have strong forces of attraction between them.
Viscosity __________ when particles of a liquid are heated. Viscosity _________ when particles of a liquid are cooled.
What is decreases and increases.
Three fluids that are less dense than water
What is rubbing alcohol, vegetable oil and gasoline
Archimedes' Principle states:
What is Archimedes' principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.
Materials in a liquid state are said to be ____________, which means they cannot be ____________ easily.
What is incompressibility and compressed?