c165 science QUESTIONS AND ANSWERS |
2025/2026 | LATEST UPDATE
questions in this set (390)
Your friend goes to a rock concert no
and the next day tells you
enthusiastically that it was the best
music ever made. Can your friend's
claim be studied using the methods
of science?
In general, metal wires expand when an independent variable
they are heated. To test this, you
heat a piece of wire and then
measure how much the wire's length
changed as a result of the
temperature change. In this
experiment, what is the wire's
temperature?
correct
an experiment in which a scientist intentionally changes one quantity
controlled experiment
and observes how another quantity changes
independent variable the variable that is changed by the experimenter in an experiment
dependent variable the variable that changes because of the independent variable
the variable that scientists do not wish to study that needs to either be
control variable
eliminated or kept constant
A student records the rising and observational study
setting times of the moon each day
for a month.
Scientists at a volcano Observational study
observatory continuously monitor
the ground movements and
volcanic gas chemistry between
and during eruptions.
A group of students sprinkle salt Controlled experiment
onto one of two burning candles and
record the color of the two flames.
, When scientists want to determine controlled experiment
the hardness of minerals, they use a
test called the Mohs test. An
experimenter trying to identify a
mineral will scratch the surface with
a set of tools of various hardness
and then analyze the results against
charts.
The first evidence that light has a an observational study
finite speed and does not travel
from place to place instantaneously
came in the 17th century from
observations that Jupiter's moons
appear later when Jupiter is farther
from Earth as compared to when
Jupiter is closer to Earth. This
phenomenon was used to show that
the difference in the time of
appearance of the moons is
consistent with a measurable speed.
What is this is an example of?
Scientists combine two organic substances in a test tube and measure
What is an example of a laboratory
study? the amount of product that forms.
You heard somewhere that salty water controlled
boils faster than pure water. You
decide to do a scientific investigation
to determine whether this is true. You
get three identical pots. You put 4
cups of pure water in the first pot. In
the second pot, you put 4 cups of
water with 2 tablespoons of salt
added. In the third pot, you put 4 cups
of water with 4 tablespoons of salt
added. Next, you heat all three pots
at the same level of heat and measure
how long it takes the water in each pot
to boil. What type of experiment is
this?
The time needed for the water in independent
each pot to boil depends on several
factors, such as the amount of liquid
you use, the level of heat you use,
and the size and composition of the
pots you use. In this experiment,
these are examples of variables. In
this experiment, what type of
variable is the salinity
(concentration of salt) of the water
?
Which type of model is a light bulb Physical model
used to model the sun as a source
of energy an example of?
Which model could be used to A balloon filled with air with its stem pinched but not tied, which is then
illustrate rocket propulsion? released so the balloon moves opposite the direction in which the air is
ejected
experiments in which systems are observational studies
observed as they appear in nature,
2025/2026 | LATEST UPDATE
questions in this set (390)
Your friend goes to a rock concert no
and the next day tells you
enthusiastically that it was the best
music ever made. Can your friend's
claim be studied using the methods
of science?
In general, metal wires expand when an independent variable
they are heated. To test this, you
heat a piece of wire and then
measure how much the wire's length
changed as a result of the
temperature change. In this
experiment, what is the wire's
temperature?
correct
an experiment in which a scientist intentionally changes one quantity
controlled experiment
and observes how another quantity changes
independent variable the variable that is changed by the experimenter in an experiment
dependent variable the variable that changes because of the independent variable
the variable that scientists do not wish to study that needs to either be
control variable
eliminated or kept constant
A student records the rising and observational study
setting times of the moon each day
for a month.
Scientists at a volcano Observational study
observatory continuously monitor
the ground movements and
volcanic gas chemistry between
and during eruptions.
A group of students sprinkle salt Controlled experiment
onto one of two burning candles and
record the color of the two flames.
, When scientists want to determine controlled experiment
the hardness of minerals, they use a
test called the Mohs test. An
experimenter trying to identify a
mineral will scratch the surface with
a set of tools of various hardness
and then analyze the results against
charts.
The first evidence that light has a an observational study
finite speed and does not travel
from place to place instantaneously
came in the 17th century from
observations that Jupiter's moons
appear later when Jupiter is farther
from Earth as compared to when
Jupiter is closer to Earth. This
phenomenon was used to show that
the difference in the time of
appearance of the moons is
consistent with a measurable speed.
What is this is an example of?
Scientists combine two organic substances in a test tube and measure
What is an example of a laboratory
study? the amount of product that forms.
You heard somewhere that salty water controlled
boils faster than pure water. You
decide to do a scientific investigation
to determine whether this is true. You
get three identical pots. You put 4
cups of pure water in the first pot. In
the second pot, you put 4 cups of
water with 2 tablespoons of salt
added. In the third pot, you put 4 cups
of water with 4 tablespoons of salt
added. Next, you heat all three pots
at the same level of heat and measure
how long it takes the water in each pot
to boil. What type of experiment is
this?
The time needed for the water in independent
each pot to boil depends on several
factors, such as the amount of liquid
you use, the level of heat you use,
and the size and composition of the
pots you use. In this experiment,
these are examples of variables. In
this experiment, what type of
variable is the salinity
(concentration of salt) of the water
?
Which type of model is a light bulb Physical model
used to model the sun as a source
of energy an example of?
Which model could be used to A balloon filled with air with its stem pinched but not tied, which is then
illustrate rocket propulsion? released so the balloon moves opposite the direction in which the air is
ejected
experiments in which systems are observational studies
observed as they appear in nature,
