Unit 2: Chemistry in Space Flashcard

element
a substance that cannot be broken down, its abbreviation contains a single capital letter: e. g. Ni, Nickel
variable
a unit in a scientific experiment that can be manipulated
constant variable
a factor in an experiment that always remains the same: e. g. Time of day
the order of the planets from the sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
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hypothesis
an educated guess about the results of an experiment, prior to an experiment
compound
two or more elements attached to each other, abbreviation contains two or more capital letters
molecule
a collection of two or more atoms clumped together
group/family
a vertical column on the periodic table, share chemical properties, there are 18
period
horizontal rows on the periodic table, there are 7
metals
left of the zigzag line, exceptions are aluminum and polonium, which touch the line
non-metals
right of the zigzag line
metalloids
all the elements touching the zigzag line
atomic number
method of organization on the periodic table, number of protons in an element
symbol
contains one capital letter, represents an element
atomic mass
estimate of the amount of matter in an atom
Elements in the same group/family…
have the same chemical properties
the 6 biochemical elements
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorous, Sulfur
CHNOPS
rotation
when something spins on its axis
revolution
moves around another object
inner planets
Mercury, Venus, Earth, Mars
Outer planets
Jupiter, Saturn, Uranus, Neptune
all are gas giants
How many universes?
one
proximity
the nearness of an object to another object
habitable zone
the zone where liquid water can exist
extermeophile
an organism that thrives in areas with extreme conditions, where we thought it was impossible for life to exist
biotic
is or was once living
abiotic
not living, never was living
What one element is found in everything biotic?
carbon

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