Which of the following is a limitation of models?(1 point)
A. Models usually do not have exactly the same features as the objects or events that they represent.
B. Models usually do not have exactly the same features as the objects or events that they represent.
C. It is often easier to study models rather than the objects or events that they represent. It is often easier to study models rather than the objects or events that they represent.
D. Sometimes models provide data when data cannot be acquired from natural objects or events. Sometimes models provide data when data cannot be acquired from natural objects or events. Models are often safer to study than the objects or events that they represent. Models are often safer to study than the objects or events that they represent.
A. Models usually do not have exactly the same features as the objects or events that they represent.
A scientist read about an experiment done by someone else. She does the same experiment in her lab to make sure it works. This is an example of(1 point)
A. replication.
B. redundancy.
C. replacement.
D. repetition.
D. repetition.
The factor that is changed throughout an experiment is called the _______.(1 point)
A. constant
B. hypothesis
C. variable
D. apparatus