Question

Scientists use many different methods of investigation. When possible, scientists want to actually experiment or observe an event. Which method is useful when developing a

scientific reasoning for an event that cannot be studied directly?
Conduct a field survey of bird populations in an area
Observe the effect of various fertilizers on corn crop yields
Use a computer model to study how the ocean liner Titanic sank
Use a wind tunnel to measure air drag on various types or automobiles

Answer 1

Observe the effect of various fertilizers on corn crop yields

Step-by-step explanation:

Answer 2

Observe the effect of various fertilizers on corn crop yields

Step-by-step explanation:

I think I'm right