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Goals

■ Measure the mass of soil before and after radish plants have been grown in it.

■ Measure the mass of radish plants grown in the soil.

■ Analyze the data to determine whether the mass gained by the plants equals the mass lost by the soil.

Materials

8-oz plastic or paper cup potting soil to fill cup scale or balance radish seeds (4) water paper towels Safety Precautions

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