Question

question 15 of 25
which model would be classified as a physical model?
a. a graph that shows changes in average temperature over the course of a year
b. marshmallows and toothpicks that are used to show the composition of a water molecule
c. an equation that represents how mass affects the force of gravity
d. a mental image of chemical bonds as being like rubber bands

Explanation:

A physical model is a tangible representation of an object or concept. Marshmallows and toothpicks are physical materials used to represent the composition of a water - molecule, making it a physical model. A graph is a visual - numerical model, an equation is a mathematical model, and a mental image is a conceptual model.

Answer:

B. Marshmallows and toothpicks that are used to show the composition of a water molecule