Need examples of a science fair project, this project need to require some sort of data (any type of science)

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Select the correct answer. what does the process of natural selection involve?