Jen and Ori are conducting an experiment to observe how sand and water absorb energy. They obtain two identical 1000-milliliter (ml) beakers, add 500 ml of distilled water to the first beaker, and 500 cubic centimeters (cm³) of sand to the second beaker. They place both beakers on a hot plate set to medium heat. Thermometers are placed in each beaker and held with clamps. Both beakers are heated for seven minutes and then removed from the hot plate to cool for an additional fifteen minutes. Jen and Ori record the temperature of each beaker at one-minute intervals.

How could Jen and Ori have increased the reliability of their experiment?

To increase the reliability of their experiment, Jen and Ori could have increased the sample size, used a control group, and used a more precise thermometer.

Explanation:

In order to increase the reliability of their experiment, Jen and Ori could have taken the following steps:

They could have increased the sample size by conducting the experiment multiple times with different sets of beakers, sand, and water.
They could have used a control group by heating an empty beaker to compare the temperature changes in the presence of sand and water.
They could have used a thermometer with a higher precision to obtain more accurate temperature measurements.

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