MCB4271
WGU C165 EXAM STUDY GUIDE QUESTIONS
WITH CRRECT DETAILED ANSWERS 2025
A mathematical model is used to predict the trajectory of a bullet fired from a gun.
Which discipline of physical science is used to develop this model? -Correct Answer
✔Physics
An environmental scientist monitors pollutants in a lake. Which two disciplines of
physical science does this scientist use? -Correct Answer ✔Chemistry and Earth science
Which study involves both Earth science and physics? -Correct Answer ✔Calculating how
much energy is associated with a hurricane
Which question could be answered with a controlled experiment? -Correct Answer
✔Does ice melt faster in an empty glass or in a glass full of water?
Which topic would be appropriate for a controlled experiment? -Correct Answer
✔Determining how fast different chemical pollutants dissolve in water
Which question requires a controlled experiment to answer? -Correct Answer ✔Which
type of rock contains the most calcium?
Sir Isaac Newton discovered that the force of gravity between two masses increases if
the masses increase, and decreases if the distance between the masses increases. No
experiments have ever contradicted this relationship. Which type of scientific statement
is this? -Correct Answer ✔Law
MCB4271
, MCB4271
The well-accepted scientific explanation for many characteristics of Earth's crust states
that the crust is broken into several large plates. These plates move slowly over the
mantle below because of convection and other processes. Earthquakes and volcanoes
are most common at places where the plates interact. Evidence from physics, chemistry,
and geology supports this explanation. Which type of scientific idea is this explanation
an example of? -Correct Answer ✔Theory
A student proposes that sugar will dissolve faster in rubbing alcohol than in water. The
student reasons that sugar and rubbing alcohol both contain carbon so they will mix
more easily. Which type of scientific idea is the student's proposal an example of? -
Correct Answer ✔Hypothesis
Law -Correct Answer ✔A body of enforceable rules governing relationships among
individuals and between individuals and their society.
Theory -Correct Answer ✔A hypothesis that has been tested with a significant amount of
data
Hypothesis -Correct Answer ✔A testable prediction, often implied by a theory
Observation -Correct Answer ✔Information obtained through the senses.
Why was the shrinking Earth idea replaced by the theory of plate tectonics? -Correct
Answer ✔Plate tectonics explained observations about Earth that the shrinking Earth
idea could not explain.
Astronomers have long accepted that plate tectonics exists nowhere in our solar system
except on Earth. In 2011, a scientist analyzed 100 NASA-space-mission photographs of
Valles Marineris on Mars, the longest known series of canyons in the solar system. The
scientist found that Valles Marineris showed features found only in locations on Earth
MCB4271
WGU C165 EXAM STUDY GUIDE QUESTIONS
WITH CRRECT DETAILED ANSWERS 2025
A mathematical model is used to predict the trajectory of a bullet fired from a gun.
Which discipline of physical science is used to develop this model? -Correct Answer
✔Physics
An environmental scientist monitors pollutants in a lake. Which two disciplines of
physical science does this scientist use? -Correct Answer ✔Chemistry and Earth science
Which study involves both Earth science and physics? -Correct Answer ✔Calculating how
much energy is associated with a hurricane
Which question could be answered with a controlled experiment? -Correct Answer
✔Does ice melt faster in an empty glass or in a glass full of water?
Which topic would be appropriate for a controlled experiment? -Correct Answer
✔Determining how fast different chemical pollutants dissolve in water
Which question requires a controlled experiment to answer? -Correct Answer ✔Which
type of rock contains the most calcium?
Sir Isaac Newton discovered that the force of gravity between two masses increases if
the masses increase, and decreases if the distance between the masses increases. No
experiments have ever contradicted this relationship. Which type of scientific statement
is this? -Correct Answer ✔Law
MCB4271
, MCB4271
The well-accepted scientific explanation for many characteristics of Earth's crust states
that the crust is broken into several large plates. These plates move slowly over the
mantle below because of convection and other processes. Earthquakes and volcanoes
are most common at places where the plates interact. Evidence from physics, chemistry,
and geology supports this explanation. Which type of scientific idea is this explanation
an example of? -Correct Answer ✔Theory
A student proposes that sugar will dissolve faster in rubbing alcohol than in water. The
student reasons that sugar and rubbing alcohol both contain carbon so they will mix
more easily. Which type of scientific idea is the student's proposal an example of? -
Correct Answer ✔Hypothesis
Law -Correct Answer ✔A body of enforceable rules governing relationships among
individuals and between individuals and their society.
Theory -Correct Answer ✔A hypothesis that has been tested with a significant amount of
data
Hypothesis -Correct Answer ✔A testable prediction, often implied by a theory
Observation -Correct Answer ✔Information obtained through the senses.
Why was the shrinking Earth idea replaced by the theory of plate tectonics? -Correct
Answer ✔Plate tectonics explained observations about Earth that the shrinking Earth
idea could not explain.
Astronomers have long accepted that plate tectonics exists nowhere in our solar system
except on Earth. In 2011, a scientist analyzed 100 NASA-space-mission photographs of
Valles Marineris on Mars, the longest known series of canyons in the solar system. The
scientist found that Valles Marineris showed features found only in locations on Earth
MCB4271
