Polymath Learning Centre

Core Ideas

• Describe the characteristics of living things:
• Need water, food, and air
• Grow, respond, reproduce
• Recognise some broad groups of living things based on similarities/differences:
  • - Plants (flowering, non-flowering)
  • - Animals (Amphibian, birds, fish, insects, mammals, reptiles)
  • - Fungi (mould, mushroom, yeast)
  • - Bacteria

Practices

• Observe living vs. non-living, note differences.
• Classify living things into broad plant/animal groups by characteristics.

Values

• Question and explore living vs. non-living around us.
• Show care by respecting living things.

Notes

• Recall of specific living things (e.g. guppy) or details (birth to young alive) not required.

Core Ideas

• Relate how different materials (wood, metal, ceramic, rubber, glass, plastic, fabric) are used based on physical properties.

Practices

• Compare properties: Strength, Flexibility, float/sink, Waterproof, Transparency

Values

• Use data to validate observations about materials' properties and uses.

Notes

• Focus on how properties match uses.
• 'strength' => ability to withstand loads.
• 'flexibility' => ability to bend without breaking.
• 'float on water' => object stays near surface (density concept not needed).
• 'waterproof' => does not absorb water.

Core Ideas

• Show an understanding that different living things have different life cycles.
  • Plants
  • Animals

Practices

• Observe and compare the life cycles of plants grown from seeds over a period of time.
• Note:
  • The focus is on the stages (seed, young plant, adult plant) of flowering plants.
• Observe and compare the life cycles of animals over a period of time (chicken, cockroach, frog, grasshopper, beetle, butterfly, mosquito).

Values

• Show curiosity by questioning and exploring the surrounding plants and animals.
• Show care and concern by being responsible towards plants and animals.

Core Ideas

• Recognise that a magnet can exert a push or a pull.
• Identify the characteristics of magnets.
  • Magnets can be made of iron or steel.
  • Magnets have two poles. A freely suspended bar magnet comes to rest pointing in a North-South direction.
  • Unlike poles attract and like poles repel.
  • Magnets attract magnetic materials.
  • Note:
    • Recall of magnetic materials like nickel/cobalt is not required.
    • Magnetic shielding and magnetic induction not required.
• Recognise uses of magnets in everyday objects.

Practices

• Compare magnets, non-magnetic materials, and magnetic materials.
• Make a magnet by the stroke method and the electrical method.

Values

• Show curiosity in exploring the uses of magnets in everyday life.

Core Ideas

• Identify the human systems in the body and state their functions (digestive, respiratory, circulatory, skeletal, and muscular).
• Note:
  • - This learning outcome introduces students to an overview of human systems in the body. Detailed knowledge of the muscular and skeletal systems (such as names of the bones/muscles in the body and descriptions of how they work) are not required.
• Identify the parts in the human digestive system (mouth, gullet, stomach, small intestine, and large intestine) and describe their functions.

Values

• Show curiosity in questioning about the structures or functions of the body.

Core Ideas

• State that matter is anything that has mass and occupies space.
• Differentiate among the three states of matter (solid, liquid, gas) in terms of shape and volume.

Practices

• Measure mass and volume using appropriate apparatus.

Values

• Show curiosity in exploring matter in the surroundings and question what they find.

Textbook Summary

• A hypothesis is a prediction of what you believe will happen based on the information that is already known.
• Solids and liquids have definite volume; hence, they cannot be compressed. (Since the textbook mentions 'definite volume' whenever it mentions being compressed, always mention 'definite volume' before mentioning being compressed.)
• Gases have no definite volume; hence, they can be compressed.
• Definition of mass: The measurement of the amount of matter an object contains.
• Definition of volume: The measurement of the amount of space that an object occupies.
• Instead of the word displace, use 'occupy the space previously occupied'.

Core Ideas

• Identify different plant parts and their functions:
  • Leaf
  • Stem
  • Root

Practices

• Observe plant parts.

Values

• Show curiosity about surrounding plants.
• Show care and concern by being responsible towards plants.

Core Ideas

• Identify some common sources of heat.
• State that the temperature of an object is a measurement of its degree of hotness.
• State that heat is a form of energy.
• Differentiate between heat and temperature.
• Show an understanding that heat flows from a hotter to a colder region until both share the same temperature.
• Relate change in an object's temperature to gain/loss of heat.
• List some effects of heat gain/loss in daily life.
  • - Contraction/expansion, change in state
• Identify good & poor conductors of heat (e.g. metals, wood, air).

Practices

• Measure temperature using a thermometer and a datalogger with temperature/heat sensors.

Values

• Show objectivity by seeking data and information to validate observations and explanations about heat.

Core Ideas

• Recognise that an object is visible when it reflects light or is a source of light.
• Recognise that light travels in straight lines & a shadow forms when light is completely/partially blocked.

Practices

• Investigate the variables that affect shadows: shape, size, positions, distance to screen.

Values

• Show objectivity by using data and information to validate observations and explanations about light.

Core Ideas

• Recognise that an electric circuit consisting of an energy source (battery) and other circuit components (wire, bulb, switch) forms an electrical system.
• Show an understanding that a closed circuit allows current to flow.
• Identify electrical conductors and insulators.
• Therefore you should not use poor and good conductors of electricity.

Practices

• Construct simple circuits from circuit diagrams.
• Investigate the effect of some variables on the current in a circuit.
• - Number of batteries (arranged in series)
• - Number of bulbs (arranged in series and parallel)

Values

• Show concern for the need to conserve and to have proper use and handling of electricity.

Core Ideas

• Recognise that air is made up of gases such as nitrogen, carbon dioxide, oxygen, and water vapour.
• Identify the parts of the human respiratory (nose, windpipe, lungs) and circulatory systems (heart, blood, blood vessels) and describe their functions.
• Note:
  • - Detailed knowledge of respiratory system (e.g., alveoli) and circulatory system (e.g., heart chambers and valves) is not required.
• Recognise the integration of the different systems (digestive, respiratory and circulatory) in carrying out life processes.

Practices

• Compare how plants, fish, and humans take in oxygen and give out carbon dioxide.
• Compare the ways in which substances are transported within plants and humans.
  • - Plants: Tubes that transport food and water
  • - Humans: Blood vessels that transport digested food, oxygen and carbon dioxide.
• Note:
  • - The use of specific terms (xylem, phloem, stomata, artery, vein, capillary) is not required.

Values

• Show objectivity by seeking data and information to validate observations and explanations about the human body.

Core Ideas

• Recognise that a cell is a basic unit of life.
• Show an understanding that living things reproduce to ensure continuity of their kind and that many characteristics of an organism are passed on from parents to offspring.
• Describe processes in the sexual reproduction of flowering plants:
• - Pollination
• - Fertilisation (seed production)
• - Seed dispersal
• - Germination
• Note: Fertilisation occurs when a male reproductive cell fuses with a female reproductive cell.

Practices

• Investigate the ways in which plants reproduce:
• - Spores
• - Seeds
• Note: Vegetative propagation (e.g., stem cutting) not required.

Values

• Show curiosity by questioning and exploring the surrounding plants and animals.
• Show care and concern by being responsible towards plants and animals.

Textbook Summary

• Definition of Pollination: the process in which pollen grains are transferred from the anther to the stigma.
• How to describe animal pollination:
• Pollen grains from the anther attach to bodies of animals that visit the flowers. As the animals move to another flower, the pollen grains get transferred onto the stigma.
• Characteristics of Animal-pollinated flowers:
• - Brightly coloured petals to attract animals.
• - Flowers contain nectar and have a scent.
• Characteristics of Wind-pollinated flowers:
• - Anthers hanging out of the flowers to increase chances of pollen being carried away by the wind.
• - Have large and feathery stigmas to increase surface area for pollen capture.
• Definition of Fertilisation: The process in which the male reproductive cell fuses with the female reproductive cell.
• Process of Fertilisation in Flowering Plants
• 1) A pollen grain lands on the stigma and produces a pollen tube.
• 2) The pollen tube, containing a male reproductive cell, grows towards the ovule.
• 3) The male reproductive cell fuses with the female reproductive cell in the ovule.
• 4) The ovary becomes the fruit, and the ovule becomes the seed. (One ovule grows into one seed. If a fruit has multiple seeds, its flower had multiple ovules.)
• Definition of Seed Dispersal: The scattering of seeds away from the parent to reduce overcrowding & competition.
• Dispersal by Animals
• - Some seeds have hooks to cling onto fur. Then moving animals scatter them.
• - Indigestible seeds found in juicy fruits. Animals may spit out or pass in droppings.
• Dispersal by Wind
• - They are small & light. Some have wing-like/hair-like structures.
• Dispersal by Explosive Action/splitting
• - split open when dry. Pod-like structures.
• Definition of Germination: Seeds grow into seedlings w/ sufficient water, oxygen, temperature.
• Non-flowering plants reproduce by spores.
• Sexual reproduction in flowering plants vs humans?
• Similar: both have fertilisation => male + female cell fusion.
• Difference: Humans do not do pollination but flowering plants do.

Core Ideas

• Recognise water exists in 3 interchangeable states.
• Understand how water changes among states:
• - Melting, Freezing, Boiling/Evaporation, Condensation
• Understand melting point/freezing point, boiling point of water.
• Roles of evaporation/condensation in water cycle, plus importance.
• Impact of water pollution on Earth's water resources.

Practices

• Compare water in 3 states.
• Investigate heat gain/loss on water's temperature/state.
• Factors affecting evaporation rate: Wind, Temperature, Exposed surface area

Values

• Concern for limited water & responsibility to conserve.

Textbook Summary

• What are the states of matter that water can exist in?
• Matter can exist in different states, such as solid, liquid, and gas. One example of matter that is readily available to us in all three states is water. We can find water in the solid, liquid, and gaseous states around us.
• water in the solid state is known as ice.
• water in the liquid state is often referred to as water.
• water in the gaseous state is called water vapour.
• - water vapour is colourless and invisible.
• - steam (water vapour) forms when water boils.
• How does water change from one state to another?
• water changes states when it gains or loses heat.
• Examples from daily life:
• 1. Melting: ice → water (e.g., ice left on a table melts).
• 2. Freezing: water → ice (e.g., water in an ice tray placed in a freezer).
• 3. Boiling: water → steam (e.g., boiling water in a pot).
• 4. Condensation: steam → water (e.g., water droplets on a pot cover).
• Processes of State Changes:
• - Melting: solid (ice) → liquid (water) at 0°C.
• - Freezing: liquid → solid at 0°C.
• - Boiling: liquid → gas at 100°C.
• - Condensation: gas → liquid when heat is lost.
• Boiling Point of water:
• - water boils at 100°C (temperature remains constant during boiling).
• - steam forms bubbles and condenses into droplets on cooler surfaces.
• Condensation:
• - Occurs when water vapour loses heat (e.g., droplets on a cold drink can).
• Evaporation:
• - liquid → gas at any temperature (differs from boiling).
• - Factors affecting evaporation rate:
• 1. Wind: Faster evaporation on windy days.
• 2. Temperature: Faster evaporation on hotter days.
• 3. Exposed Surface Area: Faster evaporation when spread out.
• Water Cycle:
• 1. Evaporation: Water bodies → water vapour.
• 2. Condensation: water vapour → Clouds (water droplets).
• 3. Precipitation: Rain returns water to Earth.
• 4. Ensures continuous freshwater supply.

Core Ideas

• Identify the factors that affect the survival of an organism: - Physical characteristics of the environment (temperature, light, water). - Availability of food. - Types of other organisms present (producers, consumers, decomposers).
• Show an understanding of the effect on organisms when the environment becomes unfavourable (organisms adapt and survive; move to other places or die).
• Show an understanding of the energy pathway from the Sun through living things and identify the roles of various organisms (producers, consumers, predators, prey) in a food chain and a food web.
• Differentiate among organism, population and community.
• - An organism is a living thing.
• - A population is a group of organisms of the same kind, living and reproducing at a given place and time.
• - A community consists of many populations living together in a particular place.
• Show an understanding that different habitats support different communities (garden, field, pond, seashore, tree, mangrove swamp).
• Show an understanding that adaptations serve to enhance survival and can be structural or behavioural.
• - Cope with physical factors
• - Obtain food
• - Escape predators
• - Reproduce by finding and attracting mates or dispersing seeds/fruits
• Give examples of man's impact (both positive and negative) on the environment

Practices

• Observe, collect and record information regarding the interacting factors within an environment.

Values

• Show care and concern for Man's impact on the environment by being respectful and responsible towards the environment.

Core Ideas

• Identify a force as a push or a pull.
• Show an understanding of the effects of a force.
  • - A force can move a stationary object.
  • - A force can speed up, slow down or change the direction of motion.
  • - A force can stop a moving object.
  • - A force may change the shape of an object.
• Recognise and give examples of the different types of forces.
  • - Magnetic force
  • - Gravitational force
  • - Elastic spring force
  • - Frictional force
• Note:
  • - Direction of frictional force for 'rolling objects' is not required.
  • - The use of specific terms such as 'air resistance' and 'water resistance' is not required.
• Recognise that objects have weight because of the gravitational force acting on the object.

Practices

• Investigate the effect of frictional force on the motion of objects.
• Investigate the effects of elastic spring force.

Values

• Show objectivity by using data and information to validate observations and explanations about forces.

Textbook Summary

• Definition of Frictional Force: Frictional force is the force that opposes motion when two surfaces are in contact.
• There is greater frictional force between an object and a rough surface than between the same object and a smooth surface.
• The amount of frictional force acting on an object does not depend on the surface area in contact.
• How frictional force can be useful:
• 1) Frictional force helps us to slow down or stop moving objects.
• 2) Frictional force between the soles of our shoes and the ground prevents us from slipping when we walk.
• 3) Frictional force between the matchstick and the matchbox causes the matchstick to light up.
• 4) Frictional force between the bicycle brakes and wheels allows a moving bicycle to slow down or stop.
• How frictional force can be a problem:
• 1) Frictional force between the boat and the water surface slows the boat down.
• 2) Frictional force between the moving parts of the machine produces heat. This can cause the parts to overheat.
• Ways to reduce frictional force:
• 1) Apply a lubricant such as oil or grease.
• 2) Use rollers and wheels.

Core Ideas

• Recognise that living things need energy from respiration to carry out life processes.
• The focus of respiration is on the release of energy from food.
• Recognise that the Sun is our primary source of energy (light and heat).
• Differentiate between the ways in which plants and animals obtain energy.

Practices

• Investigate the requirements (water, light energy, and carbon dioxide) for photosynthesis (production of sugar and oxygen).

Values

• Show objectivity by using data and information to validate observations and explanations about photosynthesis.

Core Ideas

• Recognise that energy from many resources is derived from the Sun.
• Give examples of various energy forms:
• - Kinetic, Potential, Light, Electrical, Sound, Heat

Practices

• Investigate energy conversion from one form to another.

Values

• Show care and concern by responsibly conserving energy.

Notes

• Potential energy is affected by mass and height above ground.
• As a pendulum swings upward, kinetic energy is converted to potential energy. As a pendulum swings downwards, potential energy is converted to kinetic energy.