Question

use the data table and information below to answer the following questions. a scientist used a laboratory model to test the effect of radiation, or the sun, in heating land and water on earth. to do this experiment, 200 ml of water and dry sand were placed in to 2 separate 250 - ml beakers. each beaker was then placed under the same lamp. temperature readings were taken of each substance every 2 minutes for 8 minutes. use the data table to answer the following questions. substance heated starting temp (°c) 2 min 4 min 6 min 8 min water 18 18.5 19.5 21 22 dry sand 18 20 22 24 26 identify the manipulated variable and the responding variable in this experiment. explain your reasoning.

Explanation:

The manipulated variable is the substance being heated (water or dry - sand) as the scientist deliberately changes this factor. The responding variable is the temperature because it changes in response to the type of substance being heated and the time of heating.

Answer:

Manipulated variable: The substance being heated (water or dry sand). Reason: It is the factor that the scientist changes. Responding variable: Temperature. Reason: It changes in response to the substance being heated and time.