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CSET Subtest 2 With Complete Solutions Latest Update (A+)
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CSET Subtest 2 With Complete Solutions LatestUpdate (A+)
density - ANSWER The amount of "stuff" you have in a certain amount of space.
Dens=mass/volume
Conservation of matter - ANSWER Matter cannot be destroyed. I.e. the ash and the gas
left from log being burned really adds up to the original mass of the log
element - ANSWER Substance that can't be separated into simpler substances by
chemical means
atom - ANSWER Smallest unit of an element that still has properties of that element. An
atom has a proton, neutron, and electron
proton - ANSWER -positive
-located in nucleus
-mass is 1 atomic mass unit (AMU)
neutron - ANSWER -neutral
-located in nucleus
-mass is 1 AMU
electron - ANSWER -negative
-orbits outside nucleus
-mass is 1/1836th AMU (extremely small)
Balanced atom - ANSWER Has the same number of protons and electrons
, Imbalanced charge/Ion - ANSWER Called an ion. It is positive or negative because of
more or less electrons than protons. A way to remember this is that "ion" is a small word
and electrons are a small particle
isotope - ANSWER An atom with a different number of neutrons
Atomic mass - ANSWER The quantity of anything that comprises an atom. Found by
adding the number of protons and neutrons
Atomic number - ANSWER Number of protons which the atom possesses
Half life - ANSWER The length of time taken for half the atom to decay. C14 (carbon 14)
can be utilized to date organisms that died less than 50,000 yrs ago
periodic table- ANSWER -atomic # and mass increase going left to right and top to
bottom
-chemical properties are organized by column--that go up and down
Compound - ANSWER Substance composed of two or more elements. I.e. h2o co2, and
NaCl
bonds - ANSWER What holds atoms together in a compound
Ionic: one atom loses an electron in order to form a positive ion, while the other gains an
electron to become a negative ion. It is like one atom chases another atom around
because it has just stolen an electron from it; that is how it stays together. Covalent: it
shares atoms of one or more of their electrons. Both atoms don't want to let go of their
electron, so it remains attached.
Pressure of the atmosphere ANSWER The more pressure on something, the more it
wants to go towards being a solid. The less pressure, the more it wants to be a gas. This
is because molecules like moving around and when they are moving quickly, they create
heat. When there is pressure on molecules, they cannot move about as quickly,
therefore sea level keeps things cooler than the top of a mountain hundreds of feet up
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