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WGU Integrated-Physical-Sciences Exam Questions
WGU Integrated Physical Sciences (MTC1) (Page 3 )

Updated On: 27-Feb-2026
Page 3 of 15
PDF with 70 Questions

Kepler discovered that planets move in elliptical paths around the sun. Repeated observations have confirmed Kepler's finding.

Which type of scientific statement is Kepler's discovery?

  1. Inference
  2. Theory
  3. Law
  4. Hypothesis

Answer(s): C

Explanation:

Kepler's discovery that planets move in elliptical paths around the sun is an example of a scientific law. A scientific law describes a relationship in nature that has been consistently observed to be true. Kepler's laws of planetary motion describe the predictable patterns of planetary orbits, which have been repeatedly confirmed through observation.


Reference:

Integrated Physical Sciences, Chapter 4: Scientific Laws and Theories



Sir Isaac Newton discovered that when one object applies a force to another object, the second object applies an equal force to the first object. Since Newton did his work, numerous investigations have confirmed this relationship.

Which type of scientific statement is this?

  1. Theory
  2. Hypothesis
  3. Law
  4. Inference

Answer(s): C

Explanation:

Newton's discovery that when one object applies a force to another, the second object applies an equal force back is known as Newton's third law of motion. This statement is a scientific law because it describes a fundamental and consistent principle observed in nature. It has been validated through numerous experiments and observations.


Reference:

Integrated Physical Sciences, Chapter 4: Scientific Laws and Theories



A grocery store manager notices that items placed on the end of an aisle sell better than items on the shelves. The manager suspects that items on the end of an aisle are more visible to customers walking past, so customers are more likely to purchase them.

Which type of scientific idea is the manager's assumption that visibility of items increases how often they are purchased?

  1. Hypothesis
  2. Observation
  3. Law
  4. Theory

Answer(s): A

Explanation:

The grocery store manager's assumption that visibility of items increases how often they are purchased is a hypothesis. A hypothesis is a testable prediction or explanation that can be investigated through experiments or observations. In this case, the manager's idea can be tested by placing items in different locations and measuring their sales.


Reference:

Integrated Physical Sciences, Chapter 1: The Nature of Scientific Inquiry



A scientist measures the change in temperature from a chemical reaction over a three-day period in a single experiment.
When the scientist analyzes the data, the results are five degrees Celsius higher than reported by other scientists after studying the same reaction.

How can the scientist appropriately resolve this problem?

  1. Only include data that matches the results from previous studies
  2. Publish the results as a contradiction to the previous studies
  3. Perform the experiment again
  4. Discard all of the data and report that the results should have matched previous studies

Answer(s): C

Explanation:

When a scientist's results differ significantly from those reported by others, the appropriate action is to perform the experiment again. Repeating the experiment helps to ensure that the results are accurate and reliable. It allows the scientist to verify their findings and check for any possible errors in the experimental process.


Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation



A group of scientists perform an experiment involving the interaction of protons colliding at high energies. The results of their experiment contradict current theories regarding these proton interactions.

What is the appropriate response in light of the results of this experiment?

  1. The current theory should be modified to match the findings of this experiment.
  2. The results of this experiment should be discarded.
  3. Other experiments should be done to confirm the findings of this experiment.
  4. The scientists should change the results of their experiment to be consistent with current theories.

Answer(s): C

Explanation:

When experimental results contradict current theories, it is essential to conduct additional experiments to confirm the findings. This approach ensures that the results are not due to experimental error and provides a robust basis for re-evaluating or potentially modifying existing theories. Scientific theories are refined and improved based on new, reliable evidence.


Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation






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