Unit 0 Flashcards
study for quiz
Scientific Method
evidence based method of inquiry
-evidence is collected through a series of experiments that are as accurate/ unbiased as possible
-as more information is collected, conclusions and our understanding of science changes
chemistry
the studdy of matter, its compositions, and its properties
matter
anything that has volume and mass
-“anything that takes up space”
composition
parts of matter present in specific proportions
properties
the attributes to distinguish between matter (scent, color, temperature, etc)
atoms
the smallest building block of matter
molecules
groups of atoms that are the same atoms
-ex: O2
compounds
groups of atoms that have different atoms
-ex: H2O
elements
different atoms organized by mass on the periodic table
Physical Properties
can be observed or seen without a change in composition
ex: color, shape, size, mass, texture, melting point, magnetism, density, mallubility, smell, temperature, state of matter etc.
Chemical Properties
are observed/ measured only with a change in composition
ex: toxicity, reactivity, corrosiveness, flammability, acidity, radioactivity etc
Physical Changes
change that does not alter the composition of the matter that undergoes the change
sign: phase change
chemical changes
change that alters the composition of the matter that undergoest the change
signs: change in smell, color, texture, energy (glowing or on fire), pH, an new material forming (precipitate), a solid from a liquid
pH
the strength of an acid or base
error/uncertainty
the trustworthyness of a measure
kilo (k)
1000 (10^3)
milli (m)
0.001 (10^-3)
micro (μ)
10^-6
nano (n)
10^-9
pico (p)
10^-12
mass (unit)
gram (g)
length (unit)
meter (m)
time (unit)
second (s)
temperature (unit)
Kelvin (K), Celcius (℃)
