Question

as each experiment, write down the independent variable (iv), dependent variable (dv) and constant (for some, identify the constants as well.

1. katrina wanted to figure out what type of liquid worked best for growing beans. she watered one with coca - cola, one with lemonade, and one with just water. after one week, she measured how high they had grown.

a. independent variable (iv)
b. dependent variable (dv)
c. constant

Explanation:

To determine the variables and constant for Katrina's experiment:

• Independent Variable (IV): The factor that is manipulated. Here, the type of liquid (coconut - water, water with electrolytes, plain water) is what Katrina is changing to see its effect. So the independent variable is the type of liquid used to water the plants.
• Dependent Variable (DV): The factor that is measured or observed to see the effect of the independent variable. The height the plants grow is what is being measured, so the dependent variable is the height of the plants.
• Constant: Factors that are kept the same to ensure a fair test. Some constants could be the type of plants (assuming they are the same), the amount of liquid given (if kept constant), the amount of sunlight the plants receive, the temperature of the environment, etc. For example, using the same type of plant (like all are the same species of flowering plants) would be a constant.

Answer:

a. Independent Variable (IV): Type of liquid (coconut - water, water with electrolytes, plain water)
b. Dependent Variable (DV): Height of the plants
c. Constant: Type of plant (or amount of liquid given, amount of sunlight, temperature, etc.)