Question

question 1
which of the following statements is an appropriate testable hypothesis based on the experiment shown in figure 1 and figure 2?
○ more sunlight and water will help the plant grow.
○ fertilizer helps the plant grow faster.
○ if the amount of fertilizer increases, then the height of plant growth will increase.
○ the plant will grow more when more fertilizer is added.
question 2
25 pts
using figures 1 and 2, classify the following variables:
independent variable choose
dependent variable choose
control variable choose

Explanation:

Question 1

A testable hypothesis must be specific and measurable. "If the amount of fertilizer increases, then the height of plant growth will increase" is testable as it defines variables (fertilizer amount, plant height) and a causal relationship. Other options are too vague or combine multiple factors.

(for each variable):

• Independent Variable: Chosen as the manipulated factor (e.g., fertilizer amount).
• Dependent Variable: Chosen as the measured outcome (e.g., plant growth/height).
• Control Variable: Chosen as constant factors (e.g., sunlight, water).

Answer:

If the amount of fertilizer increases, then the height of plant growth will increase.

Question 2

To classify variables:

• Independent Variable: The factor manipulated (e.g., amount of fertilizer, from context of Question 1).
• Dependent Variable: The factor measured (e.g., plant height/growth, depends on independent variable).
• Control Variable: Factors kept constant (e.g., sunlight, water, to isolate independent variable’s effect).

(Note: Since figures aren’t visible, use typical plant growth experiment logic. Adjust based on figures’ details, but standard classification applies.)