Ohio Assessments for Educators (OAE) Early Childhood Practice Exam

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A teacher places a fresh flower in dyed water to observe the color change. This activity models which scientific concept?

  1. Photosynthesis

  2. The water cycle

  3. Nutrient absorption

  4. Conservation of matter

The correct answer is: Nutrient absorption

The activity of placing a fresh flower in dyed water effectively demonstrates the concept of nutrient absorption. When the flower absorbs the colored water through its stem, it visually illustrates the process by which plants take up water and dissolved substances from the soil. This absorption is crucial for a plant's survival as it not only provides hydration but also delivers essential nutrients necessary for growth and development. In this context, the dyed water serves as an engaging and visible way to show students how plants utilize water, enhancing their understanding of the physiological processes within plants. Observing the change in color as it moves through the flower provides a clear visual representation of this internal process, reinforcing the concept of nutrient uptake in plants. The other options, such as photosynthesis, the water cycle, and conservation of matter, do not directly relate to the specific observation of color change in the context presented.