Science Definitions
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23 Terms
What is Electrical conductivity
A measure of how easily the material allows electrical current to flow through it
What is Thermal Conductivity
A measure of how easily the material allows heat to flow through it
What is Melting Point
Temperature at which a material changes from the solid state to liquid state
What is Boiling Point
Temperature at which a material changes from the liquid state to the gas state
What is Density
the mass per unit volume or the ratio of mass to volume of a substance
What is Strength
the ability of a material to support heavy loads without breaking or changing its shape permanently
What is Hardness
the ability of a material to resist wear and tear as well as scratches
What is Flexibility
the ability of a object to bend without breaking and return to its original shape and size
What is Weight
the amount of gravitational force acting on a mass
What are Elements
elements are pure substances that cannot be broken down into 2 or more simpler substances by chemical methods
What are Compounds
compounds are substances containing 2 or more different elements that are chemically combined in a fixed ratio
What are Mixtures
Mixtures are made up of 2 or more elements or compounds that are not chemically combined
What are Solutions
A mixture in which one substance dissolves completely in another substance
What are Suspensions
A mixture which contains insoluble substances in a solvent
What is light
Light is a form of energy and light also travels in a straight line
What is reflection
Reflection is the bouncing of light rays off a surface
What is a incident ray
incident rays are rays of light approaching and striking the reflecting surface
What is a reflectivd ray
The ray of light leaving the reflecting surface
What is a normal
a normal is a imaginary line perpenticular to the reflecting surface at a point of incidence
What is a Angle of incident
The angle that the incident ray makes with he normal
What is a angle of reflection
the angle that the reflected ray makes with the normal
State the laws of reflection
the incident ray, reflected ray and normal at the point of incidence all lie in the same place
Angle of incidence is equal to the angle of reflection