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.
Starting Temp (°C)
6 min
Substance Heated
Water
Dry Sand
18
2 min
18.5
20
4 min
19.5
22
8 min
22
21
24
18
26
Is this a controlled experiment? Explain.