The University of Hong Kong · S1 2026 · FACULTY OF SCIENCE

SCNC1112 Fundamentals of Modern Science

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SCNC1112 Overview

Fundamentals of Modern Science
— One course, four modules, and a single habit: read the physical world quantitatively.
  • The University of Hong Kong
  • First Semester, 2026-27
  • Level 1 undergraduate
  • Communication-Intensive Course
  • 13 chapters

SCNC1112 Fundamentals of Modern Science is a first-year course at The University of Hong Kong that runs one argument through physics, chemistry, earth science, astronomy and biology: a small set of principles, applied with numbers, explains phenomena that look unrelated. It is taught in four modules.

  • Four components, one grade Tutorial work and homework 20 per cent, project presentation 20 per cent, three module assessments 15 per cent, final examination 45 per cent.
  • Every written paper is multiple choice Three in-class assessments of ten questions each, then a two-hour final of 45 questions, so the same preparation serves all four sittings.
  • Two fifths is communication The tutorial and project components are the ones the course ties to the Communication-Intensive badge, and they are assessed on work rather than on attendance.
  • The paper rewards transfer The stated question areas include connecting different parts of the course and applying what was learned to situations no lecture covered.
SCNC1112 · The University of Hong Kong
An independent, AskSia-authored study guide. AskSia is not affiliated with, endorsed by, or sponsored by The University of Hong Kong; the course code and name are used for identification only.
Assessment

How SCNC1112 is assessed

ComponentWeightFormat
Tutorial participation and homework20%Nine one-hour tutorials plus two group assignments submitted through the course Moodle page; work submitted before and during the tutorial is assessed alongside participation
Project presentation20%A ten-minute group presentation in Tutorials 6 and 7, in teams of four, on a topic the group chooses, marked against a rubric that rewards coverage across disciplines
Three course module assessments15%Three in-class assessments, one at the end of each main module, ten multiple-choice questions each, taken on the course Moodle page in the classroom
Final examination45%Two hours, 45 multiple-choice questions, closed book apart from one double-sided A4 note sheet

Weights are as published in the 2026-27 Semester 1 course plan and are corroborated by the course overview lecture; the four numeric rows sum to 100. The course plan and the Moodle section heading call the three in-class assessments Course Module Assessments, while the regulations document and the overview lecture call them Continuous Module Assessments; both names refer to the same three sittings, abbreviated CMA. No hurdle or minimum-mark requirement for any individual component is stated in the course plan, the assessment regulations or the assignment policy, so nothing is asserted here either way; confirm on the course Moodle page.

20%20%15%45%Tutorial workPresentationModule testsFinal examinationTwo components, together 40 per cent, are the ones the course ties to communicationskills: tutorial work with homework, and the group project presentation.Weights as published in the 2026-27 Semester 1 course plan.
Current dates · verify in LMS

Current SCNC1112 dates

DateItemControl
27 September 2026, 18:00Assignment 1 rolling due dates beginDue dates roll by tutorial group; check your own group.
2 October 2026Course module assessment 1In class, ten multiple-choice questions.
12 to 17 October 2026Reading weekNo lectures scheduled.
18 October 2026, 18:00Assignment 2 rolling due dates beginDue dates roll by tutorial group; check your own group.
6 November 2026Course module assessment 2In class, at the end of the second module.
27 November 2026Course module assessment 3In class, at the end of the third module.
1 to 5 December 2026Revision periodTeaching has finished.
7 to 23 December 2026Assessment periodThe final examination date is not published in the course plan.

Dates are as published in the 2026-27 Semester 1 course plan. Confirm exact deadlines and submission settings in the live LMS.

Contents · every chapter, one map

What SCNC1112 covers

Thirteen chapters follow the teaching order of the course plan: the unifying principles of Module 0, the reactions of Module 1, the physical evolution of Module 2, the living world of Module 3, and the science communication strand that carries the Communication-Intensive badge.

01

Motion, Force and Gravity as Universal Laws

Sharpen speed, velocity, acceleration and force, read one event with all three of Newton's laws, and separate mass from weight

SCNC1112 begins with four words that everyone already uses and that science has sharpened until they are exact: speed, velocity, acceleration and force. Speed is distance divided by time. Velocity adds direction.

  • Speed, Velocity, Acceleration and Force
  • Uniform Circular Motion and Centripetal Acceleration
  • Newton's Three Laws Acting on One Event
  • Universal Gravitation and the Inverse Square
  • Mass Against Weight, and Free Fall
02

Energy, Heat and the Second Law of Thermodynamics

Work, energy and power with their units, three routes for heat transfer, spontaneity against speed, and entropy in an isolated system

The second half of Module 0 supplies the vocabulary that every later module reuses. Work is done when a force acts through a distance, and is zero when nothing moves however hard the push. Energy is the capacity to do work, measured in the same joules.

  • Work, Energy and Power With Their Units
  • Kinetic, Potential and Thermal Forms
  • Conduction, Convection and Radiation
  • Spontaneity Against Speed
  • Entropy, Isolated Systems and Direction
  • Comparing Energies Across Scales
03

Atoms, Electrons and Chemical Reactivity

Atomic number and isotopes, valence electrons, ionic, covalent and metallic bonding, and reactions as bonds broken and formed

Module 1 opens with a claim that carries the whole of the chemistry in this course: the arrangement of electrons around a nucleus determines both the energy an atom or compound holds and how readily it reacts.

  • Atomic Number, Mass Number and Isotopes
  • Valence Electrons and Filled Shells
  • Ionic, Covalent and Metallic Bonding
  • Polarity From Unequal Sharing
  • Reactions as Bonds Broken and Formed
04

Water as a Special Molecule

Boiling points against molecular mass, hydrogen bonding, the density anomaly, solvation, and the entropy behind the hydrophobic effect

Three of the ten lectures in Module 1 are given to a single substance, and the reason is that water is an outlier on nearly every property that matters to life. The cleanest demonstration is a comparison with molecules of similar size.

  • Boiling Points Against Molecular Mass
  • Hydrogen Bonding and Bent Geometry
  • Heat Capacity and the Density Anomaly
  • Solvation of Ions and Polar Molecules
  • The Hydrophobic Effect as Entropy
  • Dehydration Synthesis and Hydrolysis
05

Acid-Base Reactions and Oxygen Reduction

The logarithmic pH scale, buffers, feasibility against kinetics, catalysts and activation barriers, and controlled oxygen reduction

The reaction half of Module 1 begins with water acting as a reactant rather than only as a solvent. An acid donates a hydrogen ion and a base accepts one, and water does both.

  • Water as Both Acid and Base
  • The Logarithmic pH Scale
  • Buffers and Resistance to Change
  • Energetic Feasibility Against Kinetics
  • Catalysts and Activation Barriers
  • Controlled Against Uncontrolled Oxygen Reduction
06

Planet Earth: The Geosphere and Deep Time

Seismic evidence for the interior, mantle convection and plate boundaries, half-lives, choosing a radiometric clock, and superposition

Module 2 opens with a methodological claim rather than a fact: we can learn about things we cannot touch. Nobody has sampled the mantle, let alone the core, and the structure of the Earth's interior is nevertheless known in detail.

  • Seismic Waves and the Shadow Zone
  • Density Evidence From Mass and Meteorites
  • Mantle Convection and Plate Boundaries
  • Half-Lives and the Decay Law
  • Choosing a Clock for the Age
  • Superposition and Cross-Cutting Relations
07

Atmosphere, Climate and Earth in Space

The radiation budget, greenhouse absorption, reflectivity feedback, poleward heat transport, the carbon cycle, and axial tilt

The atmosphere and hydrosphere lecture is built on one sentence: how energy moves around a planet is what explains both a changing climate and the Earth's own history. Taken literally, that turns climate into an accounting problem.

  • The Radiation Budget as Accounting
  • Greenhouse Absorption and Re-Emission
  • Reflectivity and the Ice Feedback
  • Poleward Transport by Air and Ocean
  • The Carbon Cycle Across Reservoirs
  • Axial Tilt and the Seasons
08

Planets, Stars and the Expanding Universe

The habitable band and inverse square starlight, the main-sequence balance, mass against stellar lifetime, nucleosynthesis, and cosmological evidence

The astronomy half of Module 2 turns an open question into a calculable one. The search for life elsewhere is organised around liquid water, because whether water can be liquid on a planet depends mostly on how much stellar energy reaches it.

  • Liquid Water and the Habitable Band
  • Inverse Square Fall of Starlight
  • Gravity Against Pressure on the Main Sequence
  • Mass, Luminosity and Stellar Lifetime
  • Where the Chemical Elements Were Made
  • Expansion, Microwave Background and Abundances
09

The Origin of Life and Its Molecules

Four requirements for a living system, models for the origin of life, falsifiability, carbon and the four molecule families, and protein structure

Module 3 opens on a definitional problem. Everyone can tell a cat from a stone and almost nobody can state the rule they used.

  • Four Requirements for a Living System
  • Where Viruses Sit in That Definition
  • Models for the Origin of Life
  • Falsifiability as the Standard
  • Carbon and the Four Molecule Families
  • Four Levels of Protein Structure
10

DNA, Genomics and the Rules of Inheritance

Base pairing and packaging, the experiment that settled replication, transcription and translation, and alleles with mitosis against meiosis

DNA is a double-stranded molecule whose sugar and phosphate backbone carries four bases, each pairing with one specific partner on the opposite strand.

  • Base Pairing and Information Capacity
  • Histones, Chromatin and Chromosomes
  • Three Models of Replication Tested
  • Transcription and Translation
  • Why Identical DNA Gives Different Cells
  • Alleles, Dominance, Mitosis and Meiosis
11

Cells, Organ Systems and Feedback Control

Cell theory and compartmentation, channels, transporters and receptors, agonists against antagonists, and negative against positive feedback

Cell theory makes three claims: every living organism is built from at least one cell, the cell is the smallest unit in which structure and organisation are assembled, and new cells come only from cells that already exist.

  • Cell Theory and Its Third Clause
  • Organelles and Compartmentation
  • Channels, Transporters and Receptors
  • Agonists Against Antagonists
  • Sensor, Control Centre and Effector
  • Positive Loops and Their Stopping Conditions
12

Evolution, Ecology and the Anthropocene

Selection as six checkable statements, four independent lines of evidence, speciation, trophic energy transfer, and biodiversity risk

Natural selection is best handled as an argument rather than a slogan.

  • Selection Set Out as Six Statements
  • Random Mutation Against Non-Random Selection
  • Four Independent Lines of Evidence
  • Speciation and the Molecular Clock
  • Trophic Levels and Ten Per Cent Transfer
  • Biodiversity, Rivets and Irreversibility
13

Science Communication and the Group Project

The Communication-Intensive badge, the assignment to presentation sequence, reading a research article, and the submission rules that cost marks

Two of the four assessed components carry 40 per cent between them and are flagged in the course plan as the components tied to the development of communication competency.

  • What the Communication-Intensive Badge Requires
  • Assignment 1 to Assignment 2 to Presentation
  • Four Passes Through a Research Article
  • Building a Slide Around One Finding
  • Submission Formats and Late Penalties
  • Disclosure of AI Assistance and Peer Evaluation

Module 0 sets out the universal principles of motion, gravity, energy, heat and entropy. Module 1 covers the reactions that matter to the physical and living world, from electronic structure and water to acid-base chemistry and the reduction of oxygen. Module 2 follows the evolution of the physical world from the interior of the Earth to the expansion of the universe.

Module 3 covers the living world from the molecules of life to genomes, cells, evolution and ecosystems. The course states its own mathematical expectation plainly: mathematics is the language of science and quantitative arguments are not avoided, while usage is kept simple, with scientific notation, straightforward algebra and trigonometry.

Students are not expected to run complex computations and are expected to understand what a relation means and to reason from it. Assessment is split four ways. Tutorial participation with homework carries 20 per cent, the group project presentation carries 20 per cent, three in-class course module assessments carry 15 per cent between them, and a two-hour final examination of 45 multiple-choice questions carries 45 per cent.

The course plan flags the first two as the components tied to developing communication competency, and SCNC1112 holds the Communication-Intensive Course badge, which appears on a student's academic attainment profile.

Questions in the module assessments and the final examination are described as covering three areas: knowledge of the fundamental concepts covered in class, connecting material from different parts of the class into a synthesis, and adopting what was learned to novel situations.

Those three describe different tasks rather than three difficulty levels, and each fails for a different reason, which is why this guide organises its practice the same way. This guide follows the teaching order of the course plan across thirteen chapters, with a final chapter on the communication strand that carries 40 per cent of the mark and is the part most often left until the week it is due.

Worked example · free

Planning a semester around three module assessments instead of one examination

Q [6 marks]. You have four assessed components and thirteen weeks. Work out how the three in-class module assessments should change what you do, given that they carry 15 per cent between them while the final examination carries 45 per cent and is described as similar in style. Then say what the plan should look like for the 40 per cent that is not a multiple-choice paper. The marks shown here are our own study weighting and are not a University of Hong Kong marking scheme.
Figure 13.1.Figure 13.1. The three deliverables in sequence, each block sized by how much work it carries. Nothing in this strand is standalone; each stage is the rehearsal for the one after it.Assignment 1analyse one research articleAssignment 2a reference description file with three content slidesProject presentationten minutes, team of four, topic of your choiceeach stage is rehearsal for the next
Figure 13.1. The three deliverables in sequence, each block sized by how much work it carries. Nothing in this strand is standalone; each stage is the rehearsal for the one after it.
  • 2Read the module assessments as feedback rather than as verdicts. Each is worth five per cent, small enough to be cheap and large enough to be honest about how your preparation is working.
  • 2Sort every missed question into one of the three stated question areas: vocabulary, connecting parts of the course, or applying to a new situation. The distribution tells you what to change, and the three areas need different repairs.
  • 2Schedule the communication components on their own track. Tutorial work, two group assignments and the presentation carry 40 per cent and run on rolling deadlines set by tutorial group, so they cannot be absorbed into revision weeks.
Treat each module assessment as a diagnostic: sort the questions you missed by the three stated areas, then repair the area that dominates rather than rereading everything. Vocabulary errors are fixed with definitions and units, synthesis errors with cross-module practice, and transfer errors by restating principles in your own words before looking at any worked example. Keep the tutorial and project work on a separate schedule, because it carries 40 per cent and its deadlines are set by your tutorial group rather than by the examination timetable.
Sia tip — After each module assessment, write down which of the three stated question areas your errors fell into before you look at the answers again. That sorting decides what you do next far better than the score does.
Glossary

Key terms

Course Module Assessment
One of three in-class assessments, each of ten multiple-choice questions taken on the course Moodle page at the end of a module, together worth 15 per cent.
Communication-Intensive Course
A University designation recorded on a student's academic attainment profile, which this course carries through its tutorial, assignment and presentation work.
Unifying Concept
A principle that explains phenomena across several branches of science, such as energy conversion or entropy, and the organising idea of the opening module.
Quantitative Reasoning
Arguing from what a relation implies when a quantity changes, rather than computing a numerical answer, which is the level of mathematics this course expects.
Order of Magnitude
The size of a quantity expressed as a power of ten, used to compare things measured in different units once both are converted.
Spontaneous Process
A change with a natural tendency to occur without being driven by work, carrying no implication about how fast it happens.
Feedback Loop
A circuit in which the output of a process affects its own input, opposing the change in a negative loop and amplifying it in a positive one.
Trophic Level
An organism's position in a food chain, with roughly a tenth of the energy at one level passing into the next.
Falsifiability
The requirement that a scientific claim specify what observation would count against it, which is what separates a theory from an untestable assertion.
FAQ

SCNC1112 FAQ

How is this course assessed, and what carries the most weight?

Four components. Tutorial participation with homework is 20 per cent, the group project presentation is 20 per cent, three in-class course module assessments are 15 per cent between them, and a two-hour final examination is 45 per cent. The numeric rows sum to 100, and the course plan flags the first two as the components tied to developing communication competency.

What format are the papers, and what may be brought in?

Every written assessment is multiple choice. Each module assessment has ten questions and is taken on the course Moodle page in the classroom, where one single-sided A4 study sheet and a calculator from the approved list are permitted. The final examination is two hours and 45 questions, closed book apart from one double-sided A4 sheet, handwritten or printed.

Does this course need strong mathematics?

It needs comfort with simple quantitative reasoning rather than computational fluency. The course states that mathematics is the language of science and that quantitative arguments are not avoided, while keeping usage to scientific notation, simple algebra and trigonometry. Being able to say what happens when a quantity doubles matters more than producing a number.

What makes an integrated science course different from a single-subject one?

The questions deliberately cross subjects. Entropy introduced in the opening module returns in solvation, in stellar energy transport and in food chains, and the stated question areas include connecting material from different parts of the class. Studying each module as a separate block leaves you unprepared for a whole category of question.

How much of the grade sits outside the multiple-choice papers?

Forty per cent, in the tutorial and project components. Tutorial work is assessed on what is submitted before and during the meeting alongside participation in discussion, and the project is a ten-minute group presentation marked against a rubric that rewards coverage across more than one discipline of science.

Is there support outside lectures and tutorials?

The course runs a student-led peer-learning programme on a separate platform, where past students post assessment-style problems weekly and follow them with worked answers, and where live question sessions are scheduled before each module assessment and before the final examination. Participation is not compulsory and does not affect the grade.

What is the fastest way to use this guide?

Read each chapter alongside its module rather than saving everything for the revision period, because the three in-class assessments arrive during teaching. Work the practice with the answers covered, sort your errors by the three stated question areas, and build the double-sided sheet from what that sorting exposes.

Chapter questions

Questions students ask in each SCNC1112 chapter

Why does a satellite accelerate if its speed never changes?
Because velocity includes direction and the direction is changing continuously. Any change in velocity counts as an acceleration, and for circular motion that acceleration points at the centre of the orbit. A question that describes constant speed is often testing whether you remember that speed and velocity are different quantities. Chapter 01 · Motion, Force and Gravity as Universal Laws
Does an organism building ordered structures break the second law?
No, because the law constrains isolated systems and no organism is one. Living things take in energy, degrade it and release heat and waste to their surroundings, so the total entropy of the organism together with its environment rises even while the organism becomes more ordered. Naming the boundary of the system is what settles the argument. Chapter 02 · Energy, Heat and the Second Law of Thermodynamics
Why are elements in the same column of the periodic table alike?
Because they have the same number of electrons in their outermost shell, and those electrons are what take part in bonding. Mass and size vary down a column while the outer arrangement repeats, which is why sodium and potassium behave similarly despite their different masses. The table is a map of outer-shell arrangements. Chapter 03 · Atoms, Electrons and Chemical Reactivity
Why does ice float when almost every other solid sinks in its own liquid?
Because the hydrogen bonds in ice hold the molecules in an open arrangement with more empty space than the liquid has, so a given mass takes up more volume. Water is unusual in reaching its greatest density a few degrees above freezing rather than on solidifying, and the consequence is that lakes freeze downwards from the surface. Chapter 04 · Water as a Special Molecule
Why can a reaction be favourable and still never happen?
Because favourability and rate are decided by different quantities. Favourability compares the energy and entropy of products with reactants, while rate depends on how high the barrier is between them. Diamond converting to graphite is the standard illustration: the change is favourable at ordinary conditions and the barrier makes it take geological time. Chapter 05 · Acid-Base Reactions and Oxygen Reduction
How can anyone know what the core is made of without a sample?
By combining independent measurements that would each have to be wrong in the same direction to mislead. Shear waves fail to pass a liquid layer, so the shadow they leave fixes a boundary depth. The planet's mean density is far higher than surface rock, so something dense sits inside. Meteorites from the same early material contain iron and nickel of about the right density. Chapter 06 · Planet Earth: The Geosphere and Deep Time
Why is the greenhouse effect described as natural if it is also a problem?
Because the effect and the change in the effect are different claims. Without it the surface would sit around 33 degrees colder and the oceans would be frozen, so the natural effect is what makes the planet habitable. The concern is about the consequence of adding to the absorbing gases, which shifts where the energy balance settles. Chapter 07 · Atmosphere, Climate and Earth in Space
Why does being in the habitable zone not guarantee liquid water?
Because the zone is defined by the energy a planet receives and several other factors decide what happens to it. Venus sits near the inner edge and is far hotter than the simple calculation suggests, because its dense atmosphere traps outgoing radiation. Mars sits near the outer edge and has too thin an atmosphere to hold heat or to keep surface water stable. Chapter 08 · Planets, Stars and the Expanding Universe
Is a virus alive?
It depends where the definition is drawn, and saying so precisely is a better answer than choosing a side. A virus carries a sequence record and evolves, and it has no energy conversion of its own and no boundary maintaining an internal state, borrowing both from a host. Two of the four requirements are met and two are not. Chapter 09 · The Origin of Life and Its Molecules
If every cell has the same DNA, why are cells so different from each other?
Because having a gene and reading it are different things. Different regulatory proteins are present in different cell types and different regions of chromatin are accessible, so a different set of messenger RNAs and therefore a different set of proteins is made. Almost every question about development or tissue specialisation turns on that distinction. Chapter 10 · DNA, Genomics and the Rules of Inheritance
What is the difference between an agonist and an antagonist?
Binding and activating are separate properties. An agonist binds a receptor and produces the response; an antagonist binds the same site and produces nothing, while preventing the natural signal from acting. Many medicines work by blocking rather than stimulating, which is why describing a drug only as binding tightly says nothing about what it will do. Chapter 11 · Cells, Organ Systems and Feedback Control
Did humans evolve from chimpanzees?
No. Humans and chimpanzees share a common ancestor that lived several million years ago and is long extinct, so neither is descended from the other. The chromosome counts differ because sequence corresponding to one human chromosome is carried as two in the chimpanzee, which is a difference in packaging rather than in content; the genomes remain very similar. Chapter 12 · Evolution, Ecology and the Anthropocene
How much of the mark is earned outside the multiple-choice papers?
Forty per cent, split evenly between tutorial participation with homework and the project presentation. The course plan identifies both as the components related to developing communication competency, so preparation for them is a different activity from revising content and needs its own time in the semester. Chapter 13 · Science Communication and the Group Project
Study strategy

How to study for the exam

Work with the shape of the semester rather than against it. Module 0 finishes early and its vocabulary is reused everywhere, so the energy and entropy chapter repays being read twice.

Each of the three main modules ends with its own in-class assessment, which gives three honest checkpoints instead of one, and the useful move after each is to sort missed questions into the three stated question areas rather than to reread the module.

Vocabulary errors are repaired with definitions and units, synthesis errors with practice that deliberately crosses modules, and transfer errors by restating each principle in a sentence of your own before looking at any example. Keep the tutorial and project work on a separate schedule from revision, since it carries 40 per cent on rolling deadlines set by tutorial group.

In the last week, build the double-sided sheet as an index of constants, conversions and direction words rather than as a summary, and check every relationship you tend to state backwards.

One framing point is worth carrying through the semester: the University uses standard referencing rather than a curve, and the course overview lecture reports that scores above roughly 45 per cent have most likely produced a pass and scores above roughly 70 per cent some form of A. Those are descriptions of past cohorts offered as guidance, not published grade boundaries.

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