Review the responses below; then SELECT ALL the reasons why we use scientific models.

Question

a
Models help you understand complex systems.
b
Models are always expensive.
c
Models allow exploring very small or very large systems.
d
Models are used when systems are too expensive, expansive or impossible to use.

Answer 1

The reasons why we use scientific models are:

a. Models help you understand complex systems.
c. Models allow exploring very small or very large systems.
d. Models are used when systems are too expensive, expansive or impossible to use.

Option b ("Models are always expensive") is not a valid reason for using scientific models.