Understanding the EVS Question Context

The question describes a scenario where an Environmental Studies (EVS) teacher, Roshni, presents her students with a data chart. This chart shows the germination success rates of different types of seeds (mustard, green gram, Bengal gram, and chilli) out of a total of 20 seeds for each type. The teacher then prompts the students to explain the reasons behind the observed differences, or variations, in how well these seeds germinated.

Identifying the Skill Assessed

Roshni's goal is to evaluate a specific skill her students possess. By asking them to explain the variation in germination rates based on the provided data, she is assessing their ability to:

• Analyze the presented data chart.
• Think critically about the potential causes for the different outcomes.
• Formulate explanations grounded in observation and inquiry.

This process requires more than just guessing or stating facts; it involves a systematic approach to understanding a phenomenon.

Evaluating the Options

Let's look at why certain skills are more or less suitable in this context:

• Experiment: While experiments might be used to find out *why* seeds germinate differently, the current task focuses on explaining variations *based on existing data*. Students aren't being asked to design or conduct an experiment at this stage.
• Prediction: Prediction involves forecasting future outcomes. The question asks students to explain *past* or *observed* variations, not to predict future germination rates.
• Drawing Inference: Drawing an inference means reaching a conclusion based on evidence and reasoning. This is certainly part of the process, but it's a component of a broader skill. An inference might be, "Bengal gram germinated less." However, the question asks for the *why*, pushing beyond a simple conclusion from the chart.
• Investigation: This skill involves systematically inquiring into a subject or issue to discover facts or information. When students are asked to explain the variation in germination rates using the data chart, they are being prompted to investigate the potential causes. This includes observing the data, thinking about influencing factors (like seed viability, storage conditions, environmental factors specific to each seed type), and formulating reasoned explanations. This aligns perfectly with the process of scientific investigation.

Conclusion on the Assessed Skill

The teacher wants students to delve into the 'why' behind the differing seed germination results. This requires them to examine the data, consider possible reasons, and build an explanation. This comprehensive process of inquiry and explanation-seeking is best described as the skill of investigation. Therefore, Roshni aims to assess the students' skill in investigation.