How much water do plants need to stay alive?
Two students started their experiment with plants which were already growing, giving each plant its designated amount of water every day. Each day, the students used their vision and sense of touch to explore the plants, looking for signs of life or dying. They recorded their observations by verbally describing the plants to their teacher or pointing the plants that they felt seemed healthy.
How much water do plants need to sprout?
The other group of students planted their seeds in soil, and gave each plant its designated amount of water every day. Each day, the students used their vision and sense of touch to feel the top of the soil, looking for signs that the seed had sprouted. Students used their “yes” and “no” tangible and Mayer Johnson symbols to record whether or not they felt a seedling.
1. Finding potting soil, using an adapted jig set-up.
2. Feeling that the soil is dry.
3. Is it wet or dry?
4. If it's dry, add water.
5. Use Mayer Johnson symbols to indicate need for water.
At the end of both trials, all students sat down for a final look at the plants and seeds. Dan’s classroom looked at all four of the plants, identifying the healthiest-looking and feelings plants in the group. They looked for the plants with the most green leaves and strongest stems. It was determined that the plants that received two to three cups of water were the healthiest of all four plants.
Stephanie’s class dug out seeds from the three different pots and compared their sizes. The students used their vision and sense of touch to determine that seed which grew the largest, and identified it by pointing to one of the seeds/seedlings out of the field of three seeds. It was determined that the seed that received a little bit of water (1 cup) grew the most during the trial.
Two students came to the conclusion that the plants that got two or three cups of water everyday were the healthiest plants. This conclusion supported their initial hypothesis, “Plants need water to stay healthy,” and showed that their type of plant needs more than one cup of water every day to stay healthy.
The other group came to the conclusion that seeds that received a little bit of water (1 cup) everyday grew the most. This conclusion supported the hypothesis of three of them, but refuted the hypothesis of a fourth. The class also discussed that a seed needs just the right amount of water – not too little, and not too much – to sprout.