Me i beg you

current scientific knowledge says that there is no liquid water on earth's moon. under what circumstances is it acceptable for a group of scientists to report evidence of water on the moon?
only if new observations lead to a change in our current knowledge
if the scientists wanted to set up a space station on the moon
if the scientists believed that all objects in the solar system should have water on them
if a news report speculated that water exists on the moon

when scientists serve in advisory roles to society, they must
be careful to present only objective facts
insert personal political views into the advice
place their own moral views above the needs of society
ignore the needs of the environment and focus only on making money

if a fire should begin at your station, you must immediately throw water on it to eliminate the fire.
true
false

it is equally accurate to measure volumes with a beaker as with a graduated cylinder.
true
false

when measuring the volume of a liquid in a graduated cylinder, you should raise the cylinder up to eye level to read the meniscus more accurately.
true
false

a mixture of sand and iron filings can be separated into its individual components by using a magnet.
true
false

the best way to separate ethanol from its solution in water is to use which of the following?
chromatography
precipitation
distillation
filtration

for an electrically neutral atom, the number of protons is equal to:
the number of neutrons
the sum of neutrons + electrons
the difference of neutrons − electrons
the number of electrons

if the number of protons for an element changes, then:
the element turns into an isotope
the element becomes a different element
the number of electrons for that element changes as well
the number of neutrons changes as well

generally, when going from left to right across a period on the periodic table:
atomic radii decreaseionic radii decreasesvalence electron number decreases

generally, when going down a group on the periodic table, the ionization energy:
the same except for noble gasesremains the same except for halogens