in this experiment, 3 sets of plants were grown. one set had no light, one set had some light, one set had full sun. each set was given the same amount of water, the same temperature, the same soil and it was the same plant and same pot. in 21 days this is the amount of growth for each set of plants: the plants is no sun grew 7cm; the plants in some light grew 16cm; the plants in full sun grew 28cm.

Question

in this experiment, 3 sets of plants were grown. one set had no light, one set had some light, one set had full sun. each set was given the same amount of water, the same temperature, the same soil and it was the same plant and same pot. in 21 days this is the amount of growth for each set of plants: the plants is no sun grew 7cm; the plants in some light grew 16cm; the plants in full sun grew 28cm.

what is the independent variable
what is the dependent variable
tool used to measure volume
tool used to measure mass
tool used to measure length
tool used to measure temperature

Answer 1

An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.

A dependent variable is the response or measure of results.

What tools are available?

Answer 2

The independent variable in this experiment is the amount of light provided to the plants. The researcher manipulated this variable by exposing one set of plants to no light, another set to some light, and the last set to full sun.

The dependent variable in this experiment is the growth of the plants. This variable was measured by determining the increase in height of each set of plants over the course of 21 days.

The tool used to measure volume is not mentioned in the experiment description. However, if the experiment required measuring the volume of the soil or water given to each set of plants, a graduated cylinder or a measuring cup could be used.

The tool used to measure mass is also not mentioned in the experiment description. However, if the experiment required measuring the mass of the plants or any other objects, a balance or a scale would be used.

The tool used to measure length, which was the growth of the plants, is stated in the experiment as centimeters. Therefore, a ruler or a measuring tape could be used to measure the length of the plants.

The tool used to measure temperature is not mentioned in the experiment description. However, if the temperature of the environment or the soil needed to be measured, a thermometer would be used.