Understanding the Challenges of Chemistry: Why Chemistry Often Fears Students
Chemistry, a subject often considered daunting by many students, presents a unique set of challenges distinct from other STEM subjects. This article aims to explore why chemistry is perceived as difficult and the underlying reasons behind this perception.
The Comparison: Biology vs. Chemistry
Many students feel that chemistry is harder than biology, citing various complex concepts and topics. For instance, in Year 12, chemistry includes advanced topics like Dirac's equation, the combustion of methane, and the incompatibility of carbon carbon double bonds and hydroxyl groups. Conversely, less advanced topics in biology, such as how the body makes cholesterol or why copper compounds form blue colors, are considered more straightforward. Additionally, certain chemistry courses, like the International Baccalaureate Higher Level Chemistry (IB HL), are noted to be much harder than even the most challenging topics in High Level Biology.
Reasons Why Chemistry Strikes Fear in Students
A Visual Discipline
A major reason chemistry is difficult is its requirement for "thinking in pictures." Chemistry is a visual discipline that demands a level of spatial and mental imagery that goes beyond mere verbal processing. This visual thinking is crucial for understanding chemical structures, reactions, and molecular interactions. Students who rely too heavily on verbal thinking often struggle with this aspect of the subject.
Poor High School Preparation
Another significant factor is the quality of high school chemistry education. Insufficient preparation can lead to significant difficulties at the college level. If a student previously feared or hated chemistry in high school, they might carry that negativity with them into more advanced courses. This preconception can make it harder to engage with and overcome the challenges of the subject.
Youth Culture and Popular Media
The media often portrays chemistry in a negative light, perpetuating a fear of chemicals and complex chemical terms. This negative portrayal can discourage students and make the subject seem more intimidating than it needs to be. Overcoming this fear and embracing the visual and practical aspects of chemistry is a critical first step.
Challenges Specific to Chemistry
While many students find chemistry challenging, the difficulty can vary depending on the specific area of the subject. Let's explore some of the unique challenges that are inherent in chemistry:
Mathematical Complexity
Mathematical concepts in chemistry can be both concise and confusing. While equations can be clear and logical, balancing chemical equations can appear messy and unpredictable. This is further compounded by the fact that atomic interactions at the quantum level are not fully understood, leading to trial and error in synthesizing new compounds. The shapes and bonding in molecules can also seem random, adding to the confusion.
Logical and Measurable in Physics
In contrast, subjects like physics are more straightforward in their logical and measurable nature. Concepts like force, time, speed, and acceleration follow understandable rules that apply consistently. While there are exceptions, these can be easily explained and understood.
Hierarchical Observations in Biology
Biology, while requiring observations, is often more challenging due to its complex systems and difficulty in isolating causes and effects. For example, the spread of a disease or the rate of reproduction can only be approximated due to the multitude of factors at play. While biology can provide clear experimental data, the real-world application can be more complex and less predictable compared to the more direct measurements in physics.
In summary, while the challenges of chemistry can be daunting, recognizing these specific challenges and developing visual and mathematical thinking skills can help students master this subject. By understanding the unique aspects of chemistry and overcoming preconceived fears, students can find success and appreciation for the field.