ALEKS STUDY GUIDE 2026 ACTUAL
QUESTIONS WITH SOLUTIONS GRADED A+
● Niels has a ________ about why the wavelength of light absorbed by
hydrogen has a certain value. Niels suggests the orbit of the electron in
the hydrogen atom can only have certain radii, and when the electron
"jumps" from one orbit to another, it emits light of an energy
corresponding exactly to the difference in orbit energies. Answer:
hypothesis
● Christina decides to test the idea of her friend Anders that different
metals make characteristic colors in flame. She mixes up a variety of
metal solutions, then dips steel wires into each and puts each wire into a
flame, noting the color of the flame in her record of this _________.
Answer: experiment
● After studying how many different elements absorb X-rays, Harry
finds that the atomic number of the element is always proportional to the
square root of the wavelength of X-rays absorbed by the element, an
example of the kind of _____________ that in the late 19th and early
20th centuries hinted at the structure of the atom. Answer: law
● Hans decides to test an idea that the atom is made of a soft positive
substance with hard specks of negative substance (the electrons)
embedded in it. He sets up an __________ in which heavy positive
particles will be fired into some gold atoms. Hans will monitor how
, much these positive particles are deflected passing through the gold
atoms. Answer: experiment
● J. J. suggests the ________________ that an atom subjected to a high
voltage becomes charged because it's made of some positive material
with small bits of negative material embedded in it, like raisins in a
pudding. The high voltage rips the negative bits out, leaving the positive
material behind, and making the once neutral atom charged. Answer:
hypothesis
● Jean-Baptiste, after studying the way heat flows through solid
materials, discovers a ____________ that says the rate of heat flow is
proportional to the difference in temperature per centimeter, and he
measures the constant of proportionality for several substances. Answer:
law
● Sadi proposes the __________________ that substances become hot
when rubbed because the pressure of the rubbing squeezes out a fiery
bright substance he calls caloric. Answer: hypothesis
● Ludwig develops a _____________ about how energy is distributed
among all the motions of the atoms and molecules in substances. Using
some equations he invents from these ideas, he is able to explain how
heat flows through substances the way it does, which in turns explains
many different kinds of experiments on heating and combustion.
Answer: theory
QUESTIONS WITH SOLUTIONS GRADED A+
● Niels has a ________ about why the wavelength of light absorbed by
hydrogen has a certain value. Niels suggests the orbit of the electron in
the hydrogen atom can only have certain radii, and when the electron
"jumps" from one orbit to another, it emits light of an energy
corresponding exactly to the difference in orbit energies. Answer:
hypothesis
● Christina decides to test the idea of her friend Anders that different
metals make characteristic colors in flame. She mixes up a variety of
metal solutions, then dips steel wires into each and puts each wire into a
flame, noting the color of the flame in her record of this _________.
Answer: experiment
● After studying how many different elements absorb X-rays, Harry
finds that the atomic number of the element is always proportional to the
square root of the wavelength of X-rays absorbed by the element, an
example of the kind of _____________ that in the late 19th and early
20th centuries hinted at the structure of the atom. Answer: law
● Hans decides to test an idea that the atom is made of a soft positive
substance with hard specks of negative substance (the electrons)
embedded in it. He sets up an __________ in which heavy positive
particles will be fired into some gold atoms. Hans will monitor how
, much these positive particles are deflected passing through the gold
atoms. Answer: experiment
● J. J. suggests the ________________ that an atom subjected to a high
voltage becomes charged because it's made of some positive material
with small bits of negative material embedded in it, like raisins in a
pudding. The high voltage rips the negative bits out, leaving the positive
material behind, and making the once neutral atom charged. Answer:
hypothesis
● Jean-Baptiste, after studying the way heat flows through solid
materials, discovers a ____________ that says the rate of heat flow is
proportional to the difference in temperature per centimeter, and he
measures the constant of proportionality for several substances. Answer:
law
● Sadi proposes the __________________ that substances become hot
when rubbed because the pressure of the rubbing squeezes out a fiery
bright substance he calls caloric. Answer: hypothesis
● Ludwig develops a _____________ about how energy is distributed
among all the motions of the atoms and molecules in substances. Using
some equations he invents from these ideas, he is able to explain how
heat flows through substances the way it does, which in turns explains
many different kinds of experiments on heating and combustion.
Answer: theory
