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Question

In a science class, Mr. Sumit brought some material. It was a water bottle, a glass and thick paper sheet. He poured water in the glass and put the thick paper sheet on it. Slowly and carefully, he inverted the glass and removed his hand from there. Learners were surprised that paper had stuck to the glass and water was not coming out.
Some students said that paper had glue inside while others said it had stuck due to water inside the bottle. What, according to you, was the objective of doing this task ?
(A) Help learners to understand that experiments are the principal route to scientific knowledge.
(B) Encourage learners to construct explanations based on their observations.
(C) Encourage learners to ask questions.

The correct answer is
(A) and (B)

Science Experiment Objective Analysis

Mr. Sumit conducted a simple yet intriguing science experiment involving a glass filled with water, a thick paper sheet, and inversion. The surprising outcome was that the paper stuck to the glass, preventing the water from spilling, even when the glass was inverted. This demonstration aims to achieve specific educational objectives related to scientific inquiry and understanding.

Understanding the Experiment's Goal

The core of this task is to understand the *objective* behind Mr. Sumit's demonstration. The students' initial reactions—suggesting glue or attributing it solely to water—highlight common misconceptions or incomplete reasoning when faced with unfamiliar phenomena. The experiment serves as a practical tool to guide learning.

Analyzing Educational Objectives

Let's examine the potential objectives based on the provided options:

  • (A) Help learners to understand that experiments are the principal route to scientific knowledge. This is a key objective. The experiment itself is a practical demonstration. It shows that by performing actions (experiments) and observing the results, we can discover how the world works and build scientific understanding. It moves beyond just reading or listening to actively discovering principles.
  • (B) Encourage learners to construct explanations based on their observations. This is also a crucial objective. When students saw the paper stick, they were prompted to think *why*. Even their incorrect initial guesses (glue, water) represent an attempt to *construct explanations* based on what they observed. The teacher's role then becomes guiding them towards a correct scientific explanation (which involves atmospheric pressure).
  • (C) Encourage learners to ask questions. While this experiment might naturally lead students to ask questions like "Why did the paper stay?", it's often a secondary outcome. The primary goal is usually to demonstrate a concept and encourage explanation construction (B), which then naturally leads to further questions. In this context, the act of explaining the observed phenomenon is emphasized more directly than simply asking questions.

Evaluating the Options

Considering the nature of the demonstration and the students' reactions:

  • The experiment directly showcases a method of learning science through practical investigation, aligning with objective (A).
  • The students' immediate attempts to explain the phenomenon, whether correct or incorrect, demonstrate the encouragement of constructing explanations from observations, fulfilling objective (B).
  • While asking questions is valuable, the scenario focuses more on the process of observation leading to explanation. Therefore, (C) is a likely consequence but perhaps not the *primary* stated objective compared to (A) and (B).

The objective is to show that scientific knowledge is gained through experiments (A) and to foster the skill of developing explanations rooted in what is observed (B). The surprising result serves as a hook to engage learners in the process of scientific reasoning.

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Important Questions from Experimentation/Practical Work

  1. A teacher gives his students pictures of different animals and asks them to colour on all those animals which do not live in our houses. The motive of this activity is -

    (i) Development of creative skill

    (ii) Development of observational skill

    (iii) Development of classification skill

    (iv) Development of Data Collection

    Which of the aforementioned are correct?

  2. A teacher tells every student to make useful things from waste material. Which of the following statement is not the educational motive of the teacher?

  3. A teacher is doing an activity on density. Students observe that a steel spoon sinks in water but a
    steel bowl floats. She asks students, 'why do you think the bowl did not sink? What will make it
    sink?' Which of the following process skills is the teacher trying to develop among her learners ?
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