Question

Which of the following is an example of observational scientific investigation?


a Noting the color of a solution when heated.


b Drying solid produced by placing it in an oven.


c Placing test tubes in an ice bath for 15 minutes.


d Mixing two reactants together in a small beaker.

Answer 1

choice A is correct I hope this helped 

Answer 2

Hello there!

The correct answer is option A

Nothing the color of a solution when heated.


Good luck with your studies!