Question

Which of these is an example of how a scientist might use a model?

A) using a stopwatch to clock a runner's mile time
B) measuring the mass of an object with a scale
C) magnifying a group of cells with a microscope
D) building a brain made of plastic with many of its parts labeled

Answer 1

D, because it’s a model, not a real life subject. Have a great day!

Answer 2

Answer: Marbles placed inside a hollow sphere are used to describe protons in a nucleus.