Question

1. two plants are grown using the same light and pots. one plant is given water that has been microwaved and the other plant is given regular tap water. their height is measured after 2 weeks.

1. the blood pressure of a soldier is measured while he is resting. the soldier is then exposed to a stressful environment and his blood pressure is measured again.

Explanation:

Analyze Scenario 8

Using the Independent Variable, Dependent Variable, and Controlled Variables knowledge points

• Independent Variable: The factor deliberately changed by the experimenter. Here, it is the type of water given to the plants (microwaved water vs. regular tap water).
• Dependent Variable: The factor being measured or observed. Here, it is the height of the plants after 2 weeks.
• Controlled Variables: Factors kept constant to ensure a fair test. Here, these include the light, pots, and type of plants.

Analyze Scenario 9

Using the Independent Variable and Dependent Variable knowledge points

• Independent Variable: The factor deliberately changed or manipulated. Here, it is the stress level of the environment (resting vs. stressful environment).
• Dependent Variable: The factor being measured. Here, it is the blood pressure of the soldier.

Answer:

Question 8

• Independent Variable: Type of water given to the plants (microwaved water vs. regular tap water)
• Dependent Variable: Height of the plants after 2 weeks
• Controlled Variables: Light, pots, and type of plants

Question 9

• Independent Variable: Stress level of the environment (resting vs. stressful environment)
• Dependent Variable: Blood pressure of the soldier