science 3 Flashcards
substance
a particular kind of matter with uniform properties.
element
a part or aspect of something abstract, especially one that is essential or characteristic.
compound
something formed by a union of elements or parts
Heterogeneous mixture
a mixture in which the composition is uniform throughout the mixture
Homogeneous mixture
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture
. Solution
a liquid mixture in which the minor component the solute is uniformly distributed within the major component the solvent.
Colloid
a homogeneous substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance.
Tyndall effect
light scattering by particles in a colloid .
Suspension
a punishment in which a person is temporarily not allowed to work, go to school, or take part in an activity
Physical property
A physical property is any property of a physical system that is measurable
Physical change
the material involved in the change is structurally the same before and after the change.
Distillation
the process of separating the components of a liquid mixture through selective evaporation and condensation
Chemical property
A chemical property is any of a material’s properties that becomes evident during, or after, a chemical reaction.
Chemical change
the result of a chemical reaction
Law of conservation of mass
mass is neither created nor destroyed in chemical reactions.
Kinetic theory
a simple classical model of the thermodynamic behavior of gases.
Heat of fusion
the amount of energy required to convert one mole of solid into liquid.
Boiling point
the temperature at which the vapour pressure is equal to the standard sea-level atmospheric pressure
Heat of vaporization
The enthalpy of vaporization is a function of the pressure and temperature
Diffusion
Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration.
. Plasma
a state of matter along with solids, liquids and gases
Thermal expansion
the increase or expansion of materials as a function of heat
boyancy
a net upward force exerted by a fluid that opposes the weight of a partially or fully immersed object.
pressure
the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
viscosity
the resistance of a fluid (liquid or gas) to a change in shape or movement of neighbouring portions relative to one another.
buoyancy
the ability or tendency to float in water or air or some other fluid.
pascal
unit of pressure in the International System of Units
