Question

1. scientists want to see which fertilizer makes a plant grow tallest. they have 6 of the same type of plant. they put fertilizer a on 3 plants and fertilizer b on 3 plants. they set each under the grow lights and water with the same amount of water. they measure the height of the plant each day for 2 weeks. independent variable: __________ dependent variable: ________ controlled variable: ________ controlled variable: ________ hypothesis: __________

Explanation:

• Independent Variable: The factor that is changed or manipulated. Here, it's the type of fertilizer (A or B).
• Dependent Variable: The factor that is measured and is affected by the independent variable. It's the height of the plant.
• Controlled Variables: Factors kept the same to ensure a fair test. Here, it's the type of plant, the grow - lights, and the amount of water.
• Hypothesis: A possible prediction. For example, "Fertilizer A will make the plants grow taller than Fertilizer B."

Answer:

Independent Variable: Type of fertilizer
Dependent Variable: Height of the plant
Controlled Variable: Type of plant
Controlled Variable: Amount of water
Hypothesis: Fertilizer A will make the plants grow taller than Fertilizer B (or other reasonable prediction about the fertilizers' effect on plant height)