Foundations Lecture 1 & 2 Flashcards
Matter
Is anything that has mass and occupies space
Mass
Is physical stuff that can be pulled on by gravity
Gas
Takes shape and volume of its container
Plasma
Liquid part of blood
AND a flexible outer part of a cell
Atoms
The basic unit of matter
Protons
Have positive charge and mass located inside the nucleus
Neutrons
Have mass but no charge
Located inside the nucleus
Electrons
Have a negative charge and no mass
Located outside of the nucleus
Molecule
Is made when 2 or more atoms bind together by giving or sharing electrons
Law of Conservation of Matter
Matter is neither created nor destroyed
Physical Properties
Can be observed without changing the composition of material
Examples of physical properties
Boiling, melting, solubility, color, odor
Chemical properties
Determine how a substance can be converted into another substance
Chemical change or Reaction
Is the change of one substance into another
Pure substance
Something with constant composition
Element
Most basic category of matter
Material that’s can not be broken down into a simpler substance by chemical change
Compound
Molecule made up of two or more different elements
Homogeneous
Uniform composition throughout
(Also known as a solution)
Aqueous solution
A solution based on water
Heterogeneous
Not uniformed; varying amounts in different parts of the mixture
What state of matter can change shape but can’t be compressed?
Liquid
Accuracy
Reflects how close the measurement is to the true value of
Precision
Reflects how close different measurements with the same instrument are to each other
Meniscus
Curved surface of liquid used for measuring volume
