Question

1. some scientists use models to help them understand the natural world. which is an example of a model?

a. a scientist performing a test on the brain.
b. a 3d example of the human immune system.
c. a theory about the effectiveness of a medication to treat diabetes.
d. a mathematical formula used to predict the height of a child once they reach adulthood.

Explanation:

A model is a representation of a system or object. A 3D example of the human immune system is a physical model that helps scientists visualize and understand the complex structure and function of the immune system. A scientist performing a test on the brain is an experiment, not a model. A theory about the effectiveness of a medication is a scientific theory, not a model. A mathematical formula used to predict the height of a child once they reach adulthood is a mathematical model, but a 3D model is a more tangible and visual representation.

Answer:

B. A 3D example of the human immune system.