A researcher wants to investigate the impact of salt water on the growth of plants. Which of the following would be the best hypothesis for this experiment?
A. I will add salt water to plants and observe how they grow.
B. Plants need water to grow, and they should also be exposed to sunlight.
C. If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water.
D. I think salt water will help plants grow taller.
C. If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water.
Which of the following would be a testable hypothesis?
A. If acid is added to a solution, then the pH of the solution will go down.
B. If certain foods are healthy for you, then they should also taste good.
C. Plants produce glucose as the end product of photosynthesis.
D. Dropping a ball from a height of 10 m will cause it to bounce back up 5 m.
A. If acid is added to a solution, then the pH of the solution will go down.
The best hypothesis for this experiment would be:
C. If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water.
This hypothesis specifically states the expected outcome of the experiment, which is that the plants watered with salt water will not grow as tall as the plants watered with tap water.
The correct answer is C. "If salt water is used to water plants, then the plants will not grow as tall as those watered with tap water."
To determine the best hypothesis for this experiment, we need to consider the purpose of the study and what the researcher wants to investigate. In this case, the researcher wants to investigate the impact of salt water on the growth of plants.
Option A simply states that the researcher will add salt water to plants and observe how they grow. While this is true, it does not clearly state what the expected outcome or impact of the salt water will be on the plants' growth.
Option B mentions that plants need water and sunlight to grow, which is a generalized statement but does not specifically address the impact of salt water.
Option D states that the researcher thinks salt water will help plants grow taller, but this is an unsupported assumption as the hypothesis should be based on evidence or previous research.
Option C, on the other hand, clearly states that if salt water is used to water plants, then the plants will not grow as tall as those watered with tap water. This hypothesis suggests a specific expected outcome and directly addresses the impact of salt water on plant growth, making it the best choice for the experiment.