Moira's STEM Classroom

  Newton's Laws of Motion Sir  Isaac Newton ’s laws of motion are foundational principles in physics that describe the relationship between the motion of an object and the forces acting upon it. For marine biology students, these laws provide essential insights into the behavior of marine organisms and vehicles in aquatic environments. Understanding Newton's three laws of motion can help explain how marine life navigates through water and how human-engineered vessels operate effectively in this unique medium. First Law: Law of Inertia Newton's First Law, often referred to as the  Law of Inertia , states that an object at rest will remain at rest, and an object in uniform motion will continue to move in a straight line unless acted upon by a net external force. This principle is particularly relevant in marine environments, where the natural state of marine organisms or vessels is influenced by various external forces. For instance, a fish swimming steadily in a straight l...

  Kinematics in One Dimension Kinematics  is the branch of physics that describes the motion of objects without considering the forces that cause the motion. In one-dimensional motion, we focus on three fundamental concepts:  displacement, velocity,  and  acceleration.  Understanding these concepts is essential for marine biology students as they provide a framework for analyzing the movement of marine organisms in their aquatic environments. The study of how fish use their fins and body to propel themselves through water involves analyzing the forces generated by muscle contractions and the resulting motion. Displacement, Velocity, and Acceleration Displacement  ( x ) refers to the change in position of an object. Unlike distance, which is a scalar quantity, displacement is a vector quantity, meaning it has both magnitude and direction. For example, if a fish swims from one point to another in a straight line, its displacement is the straight-line dis...

Alcohols Alcohols, particularly in the form of ethanol, are relevant to agriculture through their use as biofuels, their influence on crop production and livestock feeding, and the safety implications for pesticide handling. Additionally, the environmental impact of alcohol production raises concerns about resource allocation and food security. As agricultural practices evolve, understanding these dynamics is crucial for promoting sustainable farming and ensuring the safety of agricultural workers. Alcohols  are a significant class of organic compounds characterized by the presence of one or more hydroxyl (-OH) functional groups attached to carbon atoms.  Structure of Alcohols Alcohols can be represented by the general formula  R-OH , where  R  is an alkyl group. The hydroxyl group (-OH) is the defining feature of alcohols, and its position on the carbon chain determines the classification of the alcohol as primary, secondary, or tertiary: Primary Alcohols (1°) ...

  Alkynes Alkynes are currently relevant to agriculture through their use in agrochemical synthesis and as markers for studying diet composition in livestock. With ongoing research, their potential applications may expand further in the future. Alkynes  are a class of unsaturated hydrocarbons that contain at least one carbon-carbon triple bond (C≡C). They are the second most saturated class of hydrocarbons after alkanes.  Learning Outcomes Describe the structure and properties of alkynes, alcohols and ethers; Apply IUPAC nomenclature to alkynes, alcohols and ethers; Understand and identify types of isomerism; and Explain the reactivity and common reactions of alkynes, alcohols and ethers. General Formula The general formula for alkynes is C n H 2n-2 , where n is the number of carbon atoms in the molecule. For example, the molecular formula of ethyne (acetylene) is  C 2 H 2 . Structure The carbon atoms involved in the triple bond are  sp -hybridized, resulting in...