Unit 4 E A model is a representation, substitute, or simplification of what is being studied, but it is
also similar to what it represents. There are many types of models, such as physical,
conceptual, or mathematical models. Models have both advantages and limitations. The
model below represents the cycle of matter between photosynthesis and cellular respiration
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Which of the following is a limitation of the model shown above?
A The model shows synthesis of new compounds.
B The model is insufficiently labeled
C The model represents two different processes rather than one.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.