chapter 1.1-1.6 Flashcards
the study of the properties of materials and the changes that materials undergo
chemistry
how does chemistry impact society in 4 ways
- medicine
- everyday precision’s of food, clothing, and shelter
- conservation of natural resources
- protect the environment
a systematic approach to research
scientific method
consists of general observations about the system
qualitative
numbers obtained by various measurements during the experiment
quantitative
steps to the scientific method
- ask a question
- do background research
- construct hypothesis
- test with an experiment
- analyze and draw conclusions
- report results
a concise statement about a relationship that is always the same
ex: mass x acceleration
law
theory
a unifying principle that explains a body of facts
ex: E= mc2 -the theory of relativity
anything that takes has mass and takes up space
matter
elements
the simplest substance that all things can be broken down into
represented on the periodic table by a chemical means
the combination of 2 or more elements
they are chemically combined but can be separated by chemical means
compound
mixtures
a combination of 2 or more substances but are not chemically combined
all mixtures can be separated based on their physical properties
Ex: iron filings and sawdust- use a magnet
salt in water- evaporate off the water
heterogeneous mixture
mixtures that have different properties throughout
ex. lucky charms
homogeneous mixtures
mixtures that identical properties throughout
ex. kool-aid, milk
solid
has definite shape and volume
