OCP-SCI10 · Knowledge Layer · CONTROLLED PILOT

Science 10 Knowledge Layer

Alberta Grade 10 Science course-first tutoring portal aligned to the Biology 30 delivery model.

Dashboard Lessons Diagnostics Assessment bank Semantic marking Learner report Analytics Tutor support Whiteboard AKOS layer Knowledge layer

SCI10-A: Energy and Matter in Chemical Change

This unit explains what matter is and how it changes. Learners classify matter, describe atoms, ions, molecules, and compounds, and read chemical formulas. They identify reactions by their reactants, products, and evidence of change, and they reason with conservation of mass: atoms are rearranged, never lost, which is why equations must balance.

Essential knowledge definitions

Term	Definition	Example
matter	Anything that has mass and takes up space.	Air, water, and iron are all matter.
pure substance	Matter made of only one kind of particle.	Distilled water is a pure substance.
mixture	A combination of two or more substances that are not chemically bonded.	Salt water is a mixture.
element	A pure substance made of one type of atom.	Oxygen (O) is an element.
compound	A pure substance made of two or more elements chemically bonded in a fixed ratio.	Water (H2O) is a compound.
atom	The smallest particle of an element that keeps its properties; electrically neutral.	A single carbon atom.
ion	A charged atom that has gained or lost electrons.	Na+ has lost one electron.
molecule	Two or more atoms bonded together.	O2 and H2O are molecules.
chemical formula	A shorthand showing the elements and counts in a substance.	CO2 means one carbon and two oxygen atoms.
chemical reaction	A process that rearranges atoms to form new substances.	Iron + oxygen forms rust.
reactant	A starting substance in a chemical reaction.	In burning, fuel and oxygen are reactants.
product	A substance formed by a chemical reaction.	Water is a product of combustion.
conservation of mass/matter	Mass is neither created nor destroyed; reactant mass equals product mass.	10 g + 15 g of reactants gives 25 g of product.
evidence of chemical change	Signs that a new substance formed: colour change, gas, precipitate, energy change.	Bubbling and a colour change during a reaction.
balancing reasoning	Ensuring the same atoms appear on both sides of an equation.	Coefficients make atom counts equal.

Vocabulary / symbols

matter: Anything that has mass and takes up space
pure substance: Matter made of only one kind of particle
mixture: A combination of two or more substances that are not chemically bonded
element: A pure substance made of one type of atom
compound: A pure substance made of two or more elements chemically bonded in a fixed ratio
atom: The smallest particle of an element that keeps its properties; electrically neutral
ion: A charged atom that has gained or lost electrons
molecule: Two or more atoms bonded together
chemical formula: A shorthand showing the elements and counts in a substance
chemical reaction: A process that rearranges atoms to form new substances
reactant: A starting substance in a chemical reaction
product: A substance formed by a chemical reaction
conservation of mass/matter: Mass is neither created nor destroyed; reactant mass equals product mass
evidence of chemical change: Signs that a new substance formed: colour change, gas, precipitate, energy change
balancing reasoning: Ensuring the same atoms appear on both sides of an equation

Formulas / symbols

mass(reactants) = mass(products) — Conservation of mass.
reactants -> products — General reaction direction.

Prerequisite ladders

Classification readiness: matter → pure substance → mixture → element (Classifying matter precedes reaction work.)
Particle readiness: atom → ion → molecule → compound (Particle types underpin formulas and reactions.)
Formula readiness: element → compound → chemical formula → molecule (Formulas encode composition of compounds.)
Reaction readiness: chemical reaction → reactant → product → conservation of mass/matter (Reactions rearrange atoms while conserving mass.)

Worked examples

Conservation of mass

Problem: 10 g of A reacts fully with 15 g of B. Find the product mass.

Mass is conserved
reactant total = 10 + 15
product mass = same total

Answer: 25 g

Read a formula

Problem: What does H2O tell you?

Subscripts give atom counts
2 hydrogen atoms, 1 oxygen atom

Answer: water: 2 H and 1 O

Identify chemical change

Problem: Iron rusts outside. Chemical or physical change?

A new substance (iron oxide) forms
new properties, not easily reversed

Answer: chemical change

Classify matter

Problem: Is salt water a pure substance?

It contains two substances
separable by physical means (evaporation)

Answer: No; it is a homogeneous mixture

Visual models

Balanced-reaction atom-count model: Show conservation by counting atoms on both sides. Elements: reactant particles, arrow, product particles, atom tally. Interaction: Learner tallies atoms on each side and confirms they match.

Misconception contrasts

Misconception	Correct concept	Why it matters
Mass disappears during a reaction.	Mass is conserved; it is only rearranged into products.	Atoms are not destroyed.
An atom and an ion are the same.	An ion is a charged atom that gained or lost electrons.	Charge distinguishes them.
A colour change alone proves a chemical change.	The key evidence is that a new substance forms; several signs together are stronger.	Some colour changes are physical.
A compound and a mixture are the same.	A compound is chemically bonded in a fixed ratio; a mixture is not.	Bonding and ratio differ.

SCI10-B: Energy Flow in Technological Systems

Energy flows through technological systems by transfer and transformation. Learners distinguish heat from temperature, track energy through a system, and compute efficiency as useful output over input. Because some energy always becomes waste, no system is perfectly efficient, and real technology choices involve tradeoffs between benefits and drawbacks.

Essential knowledge definitions

Term	Definition	Example
energy	The capacity to do work or cause change.	A moving ball has energy.
energy transfer	Movement of energy from one object to another without changing its form.	A warm cup heating your hand.
energy transformation	A change of energy from one form to another.	Chemical energy to light in a flashlight.
thermal energy	The total kinetic energy of the particles in a substance.	Hot water has more thermal energy than cold.
heat	The transfer of thermal energy between objects at different temperatures.	Heat flows from a stove to a pot.
temperature	A measure of the average kinetic energy of particles.	Water boiling at 100 C.
work	Energy transferred when a force moves an object.	Lifting a box does work.
power	The rate at which work is done or energy is used.	A 60 W bulb uses 60 J each second.
input energy	The total energy supplied to a system.	1200 J supplied to a motor.
useful output energy	The energy that performs the intended task.	300 J of motion from a motor.
efficiency	The percentage of input energy that becomes useful output.	300/1200 x 100 = 25%.
system	A set of connected parts that work together with inputs and outputs.	A hydroelectric dam.
waste energy	Energy transformed into non-useful forms, often heat or sound.	A hot, buzzing transformer.
technological tradeoff	A benefit gained at the cost of a drawback in a technology choice.	Cheap coal power versus emissions.

Vocabulary / symbols

energy (E): The capacity to do work or cause change
energy transfer: Movement of energy from one object to another without changing its form
energy transformation: A change of energy from one form to another
thermal energy: The total kinetic energy of the particles in a substance
heat (Q): The transfer of thermal energy between objects at different temperatures
temperature (T): A measure of the average kinetic energy of particles
work (W): Energy transferred when a force moves an object
power (P): The rate at which work is done or energy is used
input energy: The total energy supplied to a system
useful output energy: The energy that performs the intended task
efficiency (%): The percentage of input energy that becomes useful output
system: A set of connected parts that work together with inputs and outputs
waste energy: Energy transformed into non-useful forms, often heat or sound
technological tradeoff: A benefit gained at the cost of a drawback in a technology choice

Formulas / symbols

efficiency = (useful output / input) x 100% — Energy efficiency.
power = work / time — Power as a rate.

Prerequisite ladders

Energy-form readiness: energy → energy transfer → energy transformation → system (Learners separate transfer from transformation within systems.)
Thermal readiness: thermal energy → heat → temperature → waste energy (Heat concepts precede efficiency losses.)
Efficiency readiness: input energy → useful output energy → efficiency → waste energy (Efficiency compares useful output to input.)
Decision readiness: system → efficiency → technological tradeoff → waste energy (Evaluating technology weighs efficiency and tradeoffs.)

Worked examples

Efficiency from energy

Problem: A device outputs 125 J of useful energy from 500 J input. Find efficiency.

efficiency = useful/input x 100
= 125/500 x 100

Answer: 25%

Efficiency of a motor

Problem: A motor gives 300 J useful work from 1200 J input.

300/1200 x 100

Answer: 25%

Transformation chain

Problem: Describe energy changes in a hydroelectric dam.

gravitational potential -> kinetic (water)
kinetic -> mechanical (turbine)
mechanical -> electrical

Answer: potential -> kinetic -> mechanical -> electrical

Heat vs temperature

Problem: Explain the difference between heat and temperature.

temperature = average kinetic energy
heat = transfer of thermal energy

Answer: temperature measures average energy; heat is transfer

Visual models

Energy-flow (Sankey) model: Show input splitting into useful output and waste. Elements: input arrow, useful-output branch, waste-energy branch. Interaction: Learner sizes the branches to match a given efficiency.

Misconception contrasts

Misconception	Correct concept	Why it matters
Heat and temperature are the same.	Temperature is average particle energy; heat is transferred energy.	They measure different things.
Lost energy is destroyed.	Energy is transformed into waste forms, not destroyed.	Energy is conserved.
Efficiency can be more than 100%.	Useful output cannot exceed input, so efficiency is at most 100%.	Some energy is always wasted.
Power and energy are the same.	Power is the rate of using energy (energy per time).	They have different units.

SCI10-C: Cycling of Matter in Living Systems

Living systems cycle matter and transfer energy. Learners start with the cell and membrane transport (diffusion and osmosis), then connect photosynthesis and cellular respiration as complementary processes. At the ecosystem scale, food webs show energy decreasing at each level while decomposers keep matter cycling, and human impacts and limiting factors shape these systems.

Essential knowledge definitions

Term	Definition	Example
cell	The basic unit of living things.	A plant leaf cell.
cell membrane	The boundary that controls what enters and leaves a cell.	Selectively permeable membrane.
diffusion	Movement of particles from high to low concentration; no energy needed.	Perfume spreading across a room.
osmosis	Diffusion of water across a membrane from high to low water concentration.	Water entering a root cell.
photosynthesis	The process where plants convert light energy into glucose.	Leaves making sugar in sunlight.
cellular respiration	The process where cells release energy from glucose.	Occurs in mitochondria.
glucose	A sugar that stores chemical energy for cells.	Product of photosynthesis (C6H12O6).
oxygen	A gas produced by photosynthesis and used in respiration.	Released by leaves; O2.
carbon dioxide	A gas used in photosynthesis and released by respiration.	CO2.
water	A substance essential to cells and used in photosynthesis.	H2O taken up by roots.
ecosystem	A community of organisms interacting with their environment.	A pond ecosystem.
food web	Interconnected feeding relationships showing energy flow.	Grass -> grasshopper -> frog.
decomposer	An organism that breaks down dead matter and recycles nutrients.	Fungi and bacteria.
matter cycle	The movement of matter (e.g., carbon) through living and non-living parts.	The carbon cycle.
limiting factor	A resource or condition that restricts population growth.	Limited water in a drought.
human impact	A way human activity changes ecosystems.	Deforestation reducing habitat.

Vocabulary / symbols

cell: The basic unit of living things
cell membrane: The boundary that controls what enters and leaves a cell
diffusion: Movement of particles from high to low concentration; no energy needed
osmosis: Diffusion of water across a membrane from high to low water concentration
photosynthesis: The process where plants convert light energy into glucose
cellular respiration: The process where cells release energy from glucose
glucose: A sugar that stores chemical energy for cells
oxygen: A gas produced by photosynthesis and used in respiration
carbon dioxide: A gas used in photosynthesis and released by respiration
water: A substance essential to cells and used in photosynthesis
ecosystem: A community of organisms interacting with their environment
food web: Interconnected feeding relationships showing energy flow
decomposer: An organism that breaks down dead matter and recycles nutrients
matter cycle: The movement of matter (e
limiting factor: A resource or condition that restricts population growth
human impact: A way human activity changes ecosystems

Formulas / symbols

6CO2 + 6H2O + light -> C6H12O6 + 6O2 — Photosynthesis.
C6H12O6 + 6O2 -> 6CO2 + 6H2O + energy — Cellular respiration.

Prerequisite ladders

Cell readiness: cell → cell membrane → diffusion → osmosis (Transport builds on cell structure.)
Energy-process readiness: photosynthesis → glucose → oxygen → cellular respiration (Respiration depends on photosynthesis products.)
Ecosystem readiness: ecosystem → food web → decomposer → matter cycle (Cycling of matter builds on ecosystem roles.)
Impact readiness: ecosystem → limiting factor → human impact → matter cycle (Impacts are understood through limits and cycles.)

Worked examples

Diffusion direction

Problem: Which way do particles move in diffusion?

from high concentration
to low concentration
no energy required

Answer: high to low concentration

Photosynthesis equation

Problem: Write the word/symbol equation for photosynthesis.

reactants: carbon dioxide + water + light
products: glucose + oxygen

Answer: 6CO2 + 6H2O + light -> C6H12O6 + 6O2

Linked processes

Problem: How are photosynthesis and respiration related?

products of one are reactants of the other
energy is transferred, matter cycles

Answer: they are complementary opposite processes

Energy in a food web

Problem: What happens to energy along grass -> grasshopper -> frog?

energy decreases at each level
much is lost as heat / life processes

Answer: only a small fraction (about 10%) transfers

Visual models

Photosynthesis-respiration cycle model: Show the exchange of gases and energy. Elements: chloroplast/leaf, mitochondrion, CO2 and O2 arrows, glucose store. Interaction: Learner traces how outputs of one process feed the other.

Misconception contrasts

Misconception	Correct concept	Why it matters
Plants only photosynthesize and do not respire.	Plants do both: they make glucose and also respire to release its energy.	Both processes occur in plant cells.
Diffusion requires energy input.	Diffusion is passive; it needs no energy input.	Particles move down a concentration gradient.
Energy is recycled in an ecosystem.	Energy flows through and is lost as heat; matter is what cycles.	Energy and matter behave differently.
Decomposers are unimportant.	Decomposers recycle nutrients that other organisms reuse.	They keep matter cycling.

SCI10-D: Energy Flow in Global Systems

Energy flows through global systems, driven by solar radiation. Learners track how albedo, the atmosphere, and the hydrosphere shape Earth's energy balance, and how conduction, convection, and radiation move heat to create winds and ocean currents. They separate short-term weather from long-term climate and learn that climate claims require evidence trends from reliable long-term data.

Essential knowledge definitions

Term	Definition	Example
solar radiation	Energy from the Sun that reaches Earth.	Sunlight warming the ground.
albedo	The fraction of solar energy a surface reflects.	Ice has high albedo; dark soil is low.
atmosphere	The layer of gases surrounding Earth.	Air that holds and moves heat and water.
hydrosphere	All the water on Earth.	Oceans, lakes, and ice.
convection	Heat transfer by the movement of a fluid (rising warm, sinking cool).	Warm air rising over land.
conduction	Heat transfer by direct contact between particles.	A spoon warming in hot soup.
radiation	Heat transfer by electromagnetic waves, needing no medium.	The Sun warming Earth through space.
wind	Air movement caused by uneven heating and pressure differences.	A sea breeze.
ocean current	Large-scale movement of ocean water that redistributes heat.	Warm currents carrying heat poleward.
weather	Short-term atmospheric conditions at a place.	Today it is rainy and 12 C.
climate	The long-term average of weather patterns for a region.	A region's typical yearly climate.
greenhouse effect	Warming caused by gases trapping outgoing thermal radiation.	CO2 trapping heat in the atmosphere.
energy balance	The balance between incoming solar energy and outgoing energy.	Energy in equals energy out on average.
evidence trend	A pattern in reliable long-term data used to support a claim.	Decades of rising average temperature.
weather vs climate	Weather is short-term; climate is long-term average.	One hot day is weather, not climate.

Vocabulary / symbols

solar radiation: Energy from the Sun that reaches Earth
albedo: The fraction of solar energy a surface reflects
atmosphere: The layer of gases surrounding Earth
hydrosphere: All the water on Earth
convection: Heat transfer by the movement of a fluid (rising warm, sinking cool)
conduction: Heat transfer by direct contact between particles
radiation: Heat transfer by electromagnetic waves, needing no medium
wind: Air movement caused by uneven heating and pressure differences
ocean current: Large-scale movement of ocean water that redistributes heat
weather: Short-term atmospheric conditions at a place
climate: The long-term average of weather patterns for a region
greenhouse effect: Warming caused by gases trapping outgoing thermal radiation
energy balance: The balance between incoming solar energy and outgoing energy
evidence trend: A pattern in reliable long-term data used to support a claim
weather vs climate: Weather is short-term; climate is long-term average

Formulas / symbols

energy in (absorbed solar) = energy out (radiated) [on average] — Global energy balance.
absorbed = incoming x (1 - albedo) — Effect of reflection on absorbed energy.

Prerequisite ladders

Solar readiness: solar radiation → albedo → radiation → energy balance (Incoming energy and reflection set up the balance.)
Transfer readiness: conduction → convection → radiation → wind (Heat-transfer modes drive circulation.)
Circulation readiness: convection → wind → ocean current → atmosphere (Winds and currents move heat globally.)
Climate-reasoning readiness: weather → climate → evidence trend → weather vs climate (Climate claims require trends, not single events.)

Worked examples

Weather vs climate

Problem: Explain the difference between weather and climate.

weather = short-term conditions
climate = long-term average of weather

Answer: weather is short-term; climate is long-term average

Convection drives wind

Problem: How does convection produce wind?

uneven heating warms some air
warm air rises, cool air sinks
this circulation is wind

Answer: circulation from rising/sinking air

Currents move heat

Problem: How do ocean currents redistribute thermal energy?

warm currents carry heat toward the poles
cold currents move toward the equator

Answer: they balance global temperatures

Greenhouse effect

Problem: How do greenhouse gases affect temperature?

they trap outgoing thermal radiation
less energy escapes to space

Answer: they warm the surface

Visual models

Global energy balance model: Show incoming solar energy versus outgoing energy. Elements: incoming sunlight arrows, reflected (albedo) arrows, outgoing thermal arrows, greenhouse layer. Interaction: Learner adjusts albedo/greenhouse gases and observes the balance.

Misconception contrasts

Misconception	Correct concept	Why it matters
Weather and climate are the same.	Weather is short-term; climate is the long-term average.	They describe different timescales.
One hot day proves the climate is warming.	Climate claims need long-term trends, not a single event.	One event is weather.
The greenhouse effect is entirely harmful.	The natural greenhouse effect makes Earth livable; the concern is the enhanced effect.	Natural vs enhanced effects differ.
Convection and conduction are the same.	Convection moves heat by fluid motion; conduction moves it by direct contact.	The transfer mechanism differs.