Question

in science experiments, variables are things that can change. the independent variable is what is changed on purpose. the dependent variable is what is measured or observed in response to those changes. for example, if you want to see if the amount of water affects how tall a plant grows, the amount of water is the independent variable, and the plants height is the dependent variable.

1. in a science experiment, the variable that a scientist changes is called the independent variable.
2. the variable that is measured or observed is called the dependent variable.
3. in an experiment to see if the type of fertilizer affects plant growth, the type of fertilizer is the independent variable.
4. in an experiment to test if temperature affects how fast sugar dissolves, the temperature is the independent variable.
5. when testing if the amount of sunlight affects the number of leaves on a plant, the amount of sunlight is the independent variable, and the number of leaves is the dependent variable.

Explanation:

In scientific experiments, the independent variable is what the scientist manipulates or changes. The dependent variable is what is measured or observed and is affected by the independent variable. For example, in the case of plant - height and water amount, water amount is independent and height is dependent. When testing sunlight and leaf number, sunlight is independent and leaf number is dependent. When testing temperature and sugar - dissolving speed, temperature is independent and dissolving speed is dependent. When testing fertilizer type and plant growth, fertilizer type is independent and plant growth (measured in some way) is dependent.

Answer:

1. independent
2. dependent
3. independent
4. independent
5. independent