WGU D545 EXAM PREP TEST BANK
VERIFIED QUESTIONS AND CORRECT
ANSWERS
●● Chemistry
Answer: The study of atoms and molecules, their structures, and their
interactions to form substances
●● Earth science
Answer: The study of the Earth's structure and composition, and
processes that change Earth
●● essential attributes of science
Answer: Studies the natural world
Uses testable ideas
Relies on data from observations/experiments
Presented for evaluation by other scientists
Leads to further questions/research
●● variables
Answer: The changing quantities in an experiment
,●● independent variable
Answer: What you change in an experiment on purpose
●● dependent variable
Answer: The variable that changes because of an independent variable
●● control variable
Answer: The variable(s) you don't want to study, need to be either
eliminated or kept constant
●● observational study
Answer: When systems are observed as they appear in nature,
researchers do not attempt to change them
●● physical model
Answer: A model of a physical phenomenon, such as a planetary system
●● conceptual model
Answer: A model used to visualize things that cannot be seen, such as
atoms
●● mathematical model
, Answer: A model that treats physical objects/phenomena using
mathematical methods
●● computer model
Answer: A detailed, complex model calculated by a computer
●● principle of falsification
Answer: Principle that only falsifiable statements can be subject to
scientific inquiry
●● hypothesis
Answer: A testable statement about how something in nature works
●● law
Answer: A concise statement that is supported by scientific evidence and
repeated experiments, describes a widespread pattern in nature (what)
●● theory
Answer: A statement that explains a wide range of observations,
supported by a large body of scientific evidence (how/why)
●● meter
Answer: Base unit of length
VERIFIED QUESTIONS AND CORRECT
ANSWERS
●● Chemistry
Answer: The study of atoms and molecules, their structures, and their
interactions to form substances
●● Earth science
Answer: The study of the Earth's structure and composition, and
processes that change Earth
●● essential attributes of science
Answer: Studies the natural world
Uses testable ideas
Relies on data from observations/experiments
Presented for evaluation by other scientists
Leads to further questions/research
●● variables
Answer: The changing quantities in an experiment
,●● independent variable
Answer: What you change in an experiment on purpose
●● dependent variable
Answer: The variable that changes because of an independent variable
●● control variable
Answer: The variable(s) you don't want to study, need to be either
eliminated or kept constant
●● observational study
Answer: When systems are observed as they appear in nature,
researchers do not attempt to change them
●● physical model
Answer: A model of a physical phenomenon, such as a planetary system
●● conceptual model
Answer: A model used to visualize things that cannot be seen, such as
atoms
●● mathematical model
, Answer: A model that treats physical objects/phenomena using
mathematical methods
●● computer model
Answer: A detailed, complex model calculated by a computer
●● principle of falsification
Answer: Principle that only falsifiable statements can be subject to
scientific inquiry
●● hypothesis
Answer: A testable statement about how something in nature works
●● law
Answer: A concise statement that is supported by scientific evidence and
repeated experiments, describes a widespread pattern in nature (what)
●● theory
Answer: A statement that explains a wide range of observations,
supported by a large body of scientific evidence (how/why)
●● meter
Answer: Base unit of length
