WGU C165 Integrated Physical Sciences Exam 145
Questions with Verified Answers
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
In measuring the distance at each time, what is the independent variable? -
CORRECT ANSWER Time
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
What is the dependent variable? - CORRECT ANSWER Distance
A scientist is studying the speed of water flow in rivers by this method. Which type
of study would this be classified as? - CORRECT ANSWER A field study
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
Which type of experiment is this an example of? - CORRECT ANSWER An
uncontrolled experiment
,What is an experiment in which you deliberately change only one variable and
observe how a second variable changes as a result while you hold all other
variables that you control constant? - CORRECT ANSWER A controlled experiment
What is a model in science? - CORRECT ANSWER A simpler system that is
analogous to the real system
Which quality identifies a scientific statement as testable? - CORRECT ANSWER
There is a way to test it for falseness.
Which term describes something that tentatively assumes what happens or how it
happens in order to test what it assumes? - CORRECT ANSWER Hypothesis
The water flowing in a river comes from rain and snow that collected and
eventually ran into rivers. As the river flows to the sea, water evaporates from it,
and from all over Earth's surface, back into the atmosphere, where the water can
fall as rain and snow again. A team carries out an investigation, and it proposes
that maybe the moist air is being cooled when the wind from west to east forces
the air upward, based on knowledge that temperatures tend to decrease with
increasing height. Which term describes this step? - CORRECT ANSWER
Formulating a hypothesis
The graph shows the volume of a copper cube as a function of temperature. What
is the relationship between volume and temperature in this plot? - CORRECT
ANSWER They are directly proportional.
, The plot shows the volume of a gas measured at different pressures. What does
this data tell you about the relationship between these variables? - CORRECT
ANSWER They are inversely proportional.
The following table shows elevation of a weather balloon measured as a function
of time after its launch. What do the data indicate about the relationship between
these variables?
Time (hours) Elevation (meters)
5 1017
10 1019
15 1007
20 1008
25 1018
30 1013
35 1020
40 1007
45 1003
50 1020 - CORRECT ANSWER They are not correlated.
What is the zero point of an x-y scatterplot called? - CORRECT ANSWER Origin
A graph shows a positive correlation between temperature on the x-axis and total
rainfall amounts on the y-axis. Does this indicate that higher temperatures directly
cause the higher rainfall amounts? - CORRECT ANSWER The correlation does not
necessarily mean that there is a causal relationship.
Questions with Verified Answers
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
In measuring the distance at each time, what is the independent variable? -
CORRECT ANSWER Time
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
What is the dependent variable? - CORRECT ANSWER Distance
A scientist is studying the speed of water flow in rivers by this method. Which type
of study would this be classified as? - CORRECT ANSWER A field study
One of the members of a river research team measures how far a floating object
has traveled at 5.0 second intervals. The intent is to calculate the speed of the
water at the center of the river and collect similar data for other rivers.
Which type of experiment is this an example of? - CORRECT ANSWER An
uncontrolled experiment
,What is an experiment in which you deliberately change only one variable and
observe how a second variable changes as a result while you hold all other
variables that you control constant? - CORRECT ANSWER A controlled experiment
What is a model in science? - CORRECT ANSWER A simpler system that is
analogous to the real system
Which quality identifies a scientific statement as testable? - CORRECT ANSWER
There is a way to test it for falseness.
Which term describes something that tentatively assumes what happens or how it
happens in order to test what it assumes? - CORRECT ANSWER Hypothesis
The water flowing in a river comes from rain and snow that collected and
eventually ran into rivers. As the river flows to the sea, water evaporates from it,
and from all over Earth's surface, back into the atmosphere, where the water can
fall as rain and snow again. A team carries out an investigation, and it proposes
that maybe the moist air is being cooled when the wind from west to east forces
the air upward, based on knowledge that temperatures tend to decrease with
increasing height. Which term describes this step? - CORRECT ANSWER
Formulating a hypothesis
The graph shows the volume of a copper cube as a function of temperature. What
is the relationship between volume and temperature in this plot? - CORRECT
ANSWER They are directly proportional.
, The plot shows the volume of a gas measured at different pressures. What does
this data tell you about the relationship between these variables? - CORRECT
ANSWER They are inversely proportional.
The following table shows elevation of a weather balloon measured as a function
of time after its launch. What do the data indicate about the relationship between
these variables?
Time (hours) Elevation (meters)
5 1017
10 1019
15 1007
20 1008
25 1018
30 1013
35 1020
40 1007
45 1003
50 1020 - CORRECT ANSWER They are not correlated.
What is the zero point of an x-y scatterplot called? - CORRECT ANSWER Origin
A graph shows a positive correlation between temperature on the x-axis and total
rainfall amounts on the y-axis. Does this indicate that higher temperatures directly
cause the higher rainfall amounts? - CORRECT ANSWER The correlation does not
necessarily mean that there is a causal relationship.
