A researcher wants to investigate the impact of salt water on the growth of plants. Which of the following

Question

would be the best hypothesis for this experiment?
Answers
I think salt water will help plants grow taller.
Plants need water to grow, and they should also be exposed to sunlight.
I will add salt water to plants and observe how they grow.
If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water.

Answer 1

The best hypothesis for the experiment is:

"If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water."

This statement clearly outlines a testable prediction about the effect of salt water on plant growth compared to tap water, making it suitable as a hypothesis for the researcher's investigation.