Balancing
what is the smaller number called in this molecule:
3 H2O
a subscript
what do the group numbers at the top of the periodic table help you find for a specific element?
the group numbers help tell you how many valence electrons can be found in each group
all science starts with a ________?
question/observation
what is coach Wood's first name? (with correct spelling.)
Conner Wood
is this problem balanced? what are the correct coefficients
___ Na + ___ O2 = ___ Na2O
__4_ Na + __1_ O2 = __2_ Na2O
what do you call the elements in the group 7 family?
they are called the halogens
what is the independent variable in an experiment?
the variable being manipulated
a variable that stands alone and isn't changed by the other variables you are trying to measure.
what is broken arrow footballs overall record currently
2-3 overall
is this problem balanced? what are the correct coefficients
___ K + ___ B2O3 = ___ K2O + ___ B
_6__ K + _1__ B2O3 = _3__ K2O + _2__ B
there are 2 reasons the periodic table are arranged the way they are. what are those 2?
1. the amount of protons present in each element
2. the atomic mass that are specific to each element
what is the difference between a hypothesis and a theory?
a hypothesis is just an educated guess
a theory is a hypothesis that has been tested a lot of times by multiple people and still seen as plausible.
how long can an average person go without a drink of water?
around 72 hours or 3 days
is this problem balanced? what are the correct coefficients
___ C3H8 + ___ O2 = ___ CO2 + ___ H2O
__1_ C3H8 + __5_ O2 = __3_ CO2 + __4_ H2O
what are the names of the 4 most reactive groups?
1. alkali metals
2. alkaline earth metals
3. halogens
4. noble gases
in what format is the hypothesis supposed to be in?
it is written in a: if, then, because statement
ex: if i do this, then this will happen, because of this reasoning.
how does matter change phase
matter changes phase due to the transfer of energy
is this problem balanced? what are the correct coefficients
___ CH3CH2CH2CH3 + ___ O2 = ___ CO2 + ___ H2O
_2__ CH3CH2CH2CH3 + _13__ O2 = _8__ CO2 + _10__ H2O
how many electrons are present in the atom:
Cl-
there are 18 electrons present since the overall charge for chlorine is negative
Identify the independent variable (IV) and the dependent variable (DV) in the following studies.
1. A group of college students were given a short course in speed-reading. The instructor was curious if a monetary incentive would influence performance on a reading test taken at the end of the course. Half the students were offered $5 for obtaining a certain level of performance on the test, the other half were not offered money.
independent variable: the money being offered
dependent variable: performance on the test being performed
what is the last day of school this semester?
December 20th