Question

A scientist conducts an experiment to determine how the CO2 levels in ocean water affect the number of plants that can grow in the ocean. What is the dependent variable?

 CO2 level

 Number of plants  Plant height  Types of plants

Answer 1

Answer:Number of plants.

Step-by-step explanation:

When any experiment is conducted then there are two variables in the experiment. One of the variable is independent variable that we can change according to the need of the experiment.

Then the result of the experiment is known as dependent variable which depends on the independent variable.

Here, the concentration of carbon dioxide can be changed and is known as independent variable but the number of plants that will grow in the given carbon dioxide concentrations is dependent variable.

Answer 2

The dependent variable is 'Number of plants' which is the correct answer.

The independent variable is CO₂ levels in ocean water, however, the growth of plants in ocean water depends on the CO₂ levels. Higher CO₂ is level is conducive to the growth of plants.

Plants use CO₂ and water in photosynthesis to prepare food in the presence of light.

6CO₂ + 6H₂O + light energy = C₆H1₁₂O₆ + 6O₂.