⋆ Do take note that nickel and cobalt are not tested in the syllabus.

Magnets can be classified into two groups: natural magnets and man-made magnets. Natural magnets are lodestones that are made of magnetite while man-made magnets are made from magnetic materials.

Man-made magnets are often made into different shapes and sizes

Living things are organisms that show certain characteristics or features that make them different from non-living things. These features are:

Movement: Living things can move on their own. For example, humans, animals, and plants (e.g., plants bending towards light).

Respiration (Breathing): Living things take in oxygen and release carbon dioxide. This process is necessary to get energy from food. For example, humans breathe air, and fish breathe through gills in water.

Growth: Living things grow and increase in size or complexity. For example, a seed grows into a plant, and a baby grows into an adult.

Reproduction: Living things can produce offspring or babies. For example, animals give birth to babies, and plants produce seeds.

Sensitivity to Stimuli: Living things can respond to changes in their environment, such as light, sound, temperature, etc. For example, animals can feel danger and react quickly.

Excretion: Living things get rid of waste products from their bodies. For example, humans sweat, urinate, or exhale waste.

Nutrition: Living things need food to survive. They either make their own food (like plants through photosynthesis) or consume other living things (like animals eating plants).

Examples of Living Things:

Humans

Animals (e.g., dogs, cats, birds, insects)

Plants (e.g., trees, flowers, grass)

Microorganisms (e.g., bacteria, fungi)

2. Non-living Things

Non-living things are things that do not show the characteristics of life. They do not grow, move, reproduce, or respond to stimuli. They can be made of natural or man-made materials.

Characteristics of Non-living Things:

No movement: Non-living things cannot move on their own. For example, a rock or a table.

No respiration: They do not breathe or take in oxygen.

No growth: They do not grow or develop. For example, a chair or a pencil does not grow.

No reproduction: Non-living things cannot reproduce. For example, a car or a toy cannot have offspring.

No sensitivity to stimuli: Non-living things do not respond to changes in their environment.

No excretion: Non-living things do not excrete waste products.

No nutrition: Non-living things do not require food or nutrients.

Examples of Non-living Things:

Rocks

Water

Toys

Furniture (e.g., chairs, tables)

Vehicles (e.g., cars, bicycles)

Buildings

Differences Between Living and Non-living Things:

Characteristic Living Things Non-living Things

Movement Can move on their own Cannot move on their own

Growth Grow over time Do not grow

Reproduction Can reproduce Cannot reproduce

Respiration Respire (breathe) Do not respire

Sensitivity Respond to changes in the environment Do not respond to stimuli

Excretion Get rid of waste products Do not excrete

Nutrition Need food to survive Do not need food

Classifying Living and Non-living Things:

To classify things as living or non-living, ask yourself:

Does it move by itself? (Living)

Does it grow? (Living)

Can it reproduce? (Living)

Does it need food or air? (Living)

Does it show signs of life like breathing or responding to the environment? (Living)

Examples to Discuss:

A plant: A living thing because it grows, needs sunlight, and can reproduce.

A rock: A non-living thing because it does not grow, move, or reproduce.

A dog: A living thing because it moves, grows, breathes, and reproduces.

A computer: A non-living thing because it does not grow or reproduce, even though it is used by living things.

Fun Fact:

Even though plants are living things, they are sometimes considered less "active" compared to animals because they don’t move much. However, they still carry out all the necessary life processes like growth, reproduction, and respiration.

Living things are organisms that grow, reproduce, breathe, move, and need food and water to survive. They can also respond to their environment.

Characteristics of Living Things:

• Growth: Living things grow in size over time.

• Reproduction: Living things can produce offspring.

• Movement: Living things can move on their own or move parts of their body.

• Breathing/Respiration: Living things take in air or oxygen and release waste gases like carbon dioxide.

• Food/Feeding: Living things need food and water for energy.

• Response to Stimuli: Living things can react to changes in their environment (e.g., light, temperature, sound).

• Excretion: Living things can get rid of waste products from their bodies.

Examples of Living Things:

1. Animals:

   • Dog: Dogs eat food, breathe, move around, and reproduce.

   • Bird: Birds fly, breathe, eat, and lay eggs.

   • Fish: Fish live in water, breathe through gills, and reproduce.

   • Insects (like bees): Bees can fly, gather food (nectar), and reproduce.

2. Plants:

   • Tree: Trees grow, produce oxygen, and reproduce by seeds or flowers.

   • Flower: Flowers grow, reproduce through pollination, and need sunlight and water to survive.

   • Grass: Grass grows, can be eaten by animals, and produces seeds.

3. Humans:

   • Humans breathe, eat, grow, and reproduce. We respond to the environment and can move our bodies.

Non-living Things

Non-living things do not grow, reproduce, or carry out the activities of living things. They do not have life.

Characteristics of Non-living Things:

• Do not grow: Non-living things do not change in size or shape naturally (they can only change if affected by external factors).

• Do not reproduce: Non-living things cannot produce offspring.

• Do not move on their own: Non-living things cannot move by themselves.

• Do not breathe: Non-living things do not require air or oxygen.

• Do not need food or water: Non-living things do not consume food or water.

• Do not respond to stimuli: Non-living things do not react to changes in their environment.

Examples of Non-living Things:

1. Objects:

   • Table: A table does not grow, breathe, or move.

   • Chair: A chair is stationary and does not need food or water.

   • Book: A book does not grow or reproduce, but it can be used by people.

2. Natural Resources:

   • Rock: A rock is non-living because it does not grow, breathe, or reproduce.

   • Water: Water is essential for living things but is itself non-living.

   • Soil: Soil is a material that supports life, but it does not show signs of life itself.

3. Artificial Things:

   • Pen: A pen is an inanimate object that cannot grow, reproduce, or move on its own.

   • Toy: Toys are made for entertainment and do not carry out the life processes of living things.

4. Weather:

   • Rain: Rain is a natural phenomenon, but it is non-living. It is part of the water cycle.

1. Mammals

Characteristics:

Mammals are warm-blooded animals.

They have hair or fur on their bodies.

Mammals give birth to live young (except for a few, like the platypus, which lay eggs).

They feed their young with milk produced by the mother.

Most mammals have lungs and breathe air.

Examples of Mammals:

Dog: Has fur, gives birth to live young, and nurses its puppies with milk.

Cat: Warm-blooded, gives birth, and has fur.

Elephant: Large, gives birth to live young, and has a trunk.

Human: Warm-blooded, gives birth, and nurses babies with milk.

Bat: The only mammal that can fly, but still gives birth and has fur.

2. Birds

Characteristics:

Birds are warm-blooded animals.

They have feathers, beaks, and lay eggs.

Birds have wings, but not all birds are capable of flight (e.g., penguins and ostriches).

They breathe air with lungs and lay eggs.

Examples of Birds:

Eagle: A bird of prey, capable of flying.

Chicken: A domestic bird that lays eggs and is often farmed.

Penguin: A flightless bird that lives in cold climates and swims.

Parrot: A colorful bird that can mimic sounds and can fly.

Ostrich: A large flightless bird that lives in deserts.

3. Amphibians

Characteristics:

Amphibians can live both on land and in water (they are aquatic in the larval stage and terrestrial as adults).

They have moist skin and often breathe through their skin as well as their lungs.

Amphibians lay eggs in water, and their young are typically called tadpoles.

They are cold-blooded animals.

Examples of Amphibians:

Frog: Starts life as a tadpole in water, then grows into an adult frog with lungs.

Salamander: Lives both in water (as larvae) and on land (as an adult).

Newt: Another amphibian similar to a salamander, spends time both in water and on land.

Toad: A type of frog, but with drier, bumpier skin, often found on land.

4. Reptiles

Characteristics:

Reptiles are cold-blooded animals.

They have scaly skin, and they often lay eggs (though some give birth to live young).

Most reptiles live on land, but some (like crocodiles and sea turtles) live in water.

Reptiles breathe with lungs.

Examples of Reptiles:

Snake: Has no legs, scaly skin, and is often found in forests or deserts.

Crocodile: A large reptile that lives in water and has a long body.

Lizard: Small reptiles that often have legs and live in various environments.

Turtle: Known for its hard shell, and some live on land while others live in water.

Chameleon: A type of lizard that changes color to blend into its environment.

5. Fish

Characteristics:

Fish are cold-blooded animals that live in water.

They have gills to breathe underwater, scales on their bodies, and fins for swimming.

Most fish lay eggs, though some species give birth to live young.

Examples of Fish:

Goldfish: A small fish commonly kept as a pet.

Shark: A large, predatory fish with a cartilaginous skeleton.

Salmon: Known for migrating between fresh and saltwater.

Clownfish: Known for living in sea anemones, often found in coral reefs.

Trout: A freshwater fish found in rivers and lakes.

6. Invertebrates (Animals without a backbone)

Invertebrates are animals that do not have a backbone or spinal column. They make up the largest group of animals on Earth.

Examples of Invertebrates:

Insects (e.g., Ant, Butterfly, Bee): Insects have three body parts, six legs, and often wings.

Arachnids (e.g., Spider, Scorpion): These creatures have eight legs and no wings.

Crustaceans (e.g., Crab, Lobster, Shrimp): They often live in water and have hard exoskeletons.

Mollusks (e.g., Snail, Octopus, Clam): These animals typically have soft bodies, and some have shells.

Worms (e.g., Earthworm, Leech): These are segmented animals that usually live in soil or water.

Flowering Plants (Angiosperms)

Non-flowering Plants (Gymnosperms and other non-flowering types)

1. Flowering Plants (Angiosperms)

Characteristics:

Flowering plants are plants that reproduce through flowers.

They produce seeds that are enclosed in a fruit or pod.

The flowers are important for attracting pollinators like bees, butterflies, and birds, which help in the process of pollination.

After pollination, the flower produces seeds that will grow into new plants.

Flowering plants are usually more colorful and produce a variety of scents to attract pollinators.

Examples of Flowering Plants:

Rose: Known for its beautiful flowers, it is a common ornamental plant.

Sunflower: A large plant with bright yellow flowers, known for its seeds.

Apple Tree: A fruit tree that produces flowers which turn into apples.

Tulip: A flowering plant that grows in various colors and is popular in gardens.

Dandelion: A common weed with a yellow flower that produces many seeds.

2. Non-flowering Plants

Non-flowering plants are plants that do not produce flowers for reproduction. They reproduce in different ways, such as using spores or cones.

Subcategories of Non-flowering Plants:

A. Gymnosperms (Conifers)

Characteristics:

Gymnosperms are a group of plants that produce seeds, but the seeds are not enclosed in a fruit or flower. Instead, the seeds are exposed on cones.

They are usually cone-bearing trees or shrubs, such as pine trees, fir trees, and spruces.

Gymnosperms are often evergreen (they retain their leaves throughout the year).

They do not have colorful flowers, but they rely on wind for pollination.

Examples of Gymnosperms:

Pine Tree: Known for its long, needle-like leaves and cones that carry seeds.

Cypress Tree: Another type of evergreen tree that produces cones.

Fir Tree: Produces cones, and is often used as a Christmas tree.

Spruce Tree: Similar to pine, with needle-like leaves and cones.

B. Non-vascular Plants (Bryophytes)

Characteristics:

These plants do not have flowers, seeds, or vascular tissues (the system for transporting water and nutrients).

They reproduce through spores instead of seeds.

They are usually small, and many live in damp or shady environments because they need water for reproduction.

Examples of Non-vascular Plants:

Moss: A small, green plant that grows in moist, shaded areas and reproduces using spores.

Liverwort: A simple plant that also reproduces using spores and grows in wet conditions.

Hornwort: Another type of non-vascular plant that uses spores to reproduce.

Differences Between Flowering and Non-flowering Plants

Feature Flowering Plants (Angiosperms) Non-flowering Plants

Reproduction Produce flowers to reproduce. Do not produce flowers; reproduce via spores or cones.

Seeds Seeds are enclosed within a fruit or pod. Seeds are exposed (in cones for gymnosperms) or spores.

Pollination Usually rely on pollinators (e.g., bees, butterflies). Pollination is often wind-driven.

Examples Roses, sunflowers, apple trees. Pine trees, mosses, ferns.

Structure Have flowers and fruit. Do not have flowers or fruit.

Growth Form Typically larger, can be trees, shrubs, or herbs. Usually smaller plants (except for some conifers).

Vascular System Have a well-developed vascular system (xylem and phloem). Non-vascular plants have no vascular tissues (except for conifers).

Leaf Type Leaves can be broad or narrow depending on the plant. Leaves are often smaller and simpler, especially in non-vascular plants like mosses.

Key Differences:

Flowers: Flowering plants produce flowers; non-flowering plants do not.

Seeds: Flowering plants have seeds enclosed within fruit; non-flowering plants have seeds exposed in cones or reproduce via spores.

Pollination: Flowering plants rely on pollinators (like bees) or wind; non-flowering plants generally rely on wind for pollination (except for mosses and ferns).

Size and Structure: Flowering plants tend to be larger and more diverse (from small herbs to large trees), while non-flowering plants are often smaller and simpler in structure.

Examples: Flowering plants include roses and apple trees, while non-flowering plants include mosses and pine trees.

Key Characteristics of Fungi:

No Photosynthesis: Fungi do not make their own food using sunlight. They get nutrients by absorbing them from other organic material (like dead plants or animals).

Made of Hyphae: Fungi are made of tiny thread-like parts called hyphae. These threads grow and spread out to form a mycelium, which helps the fungus absorb food.

Reproduce with Spores: Instead of seeds, fungi reproduce using tiny spores. These spores can float in the air or be carried by water and animals.

Do Not Move: Fungi cannot move on their own. They spread their spores with the help of wind, water, or animals.

Types of Fungi:

Molds:

Molds grow on food, damp surfaces, or decaying things. They look fuzzy.

Example: Bread mold (the fuzzy stuff you sometimes see on old bread).

Yeasts:

Yeasts are tiny, single-celled fungi. They are important for making bread rise and making beer or wine.

Example: Baker’s yeast (used in baking) and brewer's yeast (used to make beer).

Mushrooms:

Mushrooms are the most well-known fungi. They are large and have a stem and cap. The part we see is called the fruiting body, and it releases spores.

Example: Button mushrooms (the small, edible mushrooms you see in salads or on pizza).

Lichens:

Lichens are made of both a fungus and an alga (a small plant). They grow on rocks, trees, or walls. They are very important for the environment because they help break down rock into soil.

Example: Crusty lichens that grow on tree trunks or rocks.

Importance of Fungi:

Decomposers: Fungi help break down dead plants and animals, which returns important nutrients to the soil.

Food: We eat some fungi, like mushrooms and yeast in bread and drinks.

Medicine: Fungi help make medicine like penicillin, which is used to treat infections.

Toxins: Some fungi are poisonous. For example, the death cap mushroom can make people very sick if eaten.

Fungi vs. Plants:

Feature Fungi Plants

How they get food Absorb food from dead things Make their own food from sunlight

Structure Made of hyphae (tiny threads) Have roots, leaves, and stems

Reproduction Use spores Use seeds or spores

They are so small that you need a microscope to see them.

Some bacteria are good and help us, while others can make us sick.

Characteristics of Bacteria:

Single Cell: Bacteria are made of only one cell.

Shape: Bacteria come in different shapes:

Round (Cocci)

Rod-shaped (Bacilli)

Spiral (Spirilla)

Reproduce Fast: Bacteria can make copies of themselves really quickly.

Where Can You Find Bacteria?

Bacteria are everywhere:

On your skin.

Inside your body (in your stomach and intestines).

On food, water, and in the air.

Types of Bacteria:

Good Bacteria:

Help us digest food.

Make yogurt and cheese.

Help clean up waste in the environment.

Example: The bacteria that help make yogurt.

Bad Bacteria:

Can make you sick and cause infections.

Example: Salmonella (causes food poisoning) and Strep throat.

How Do Bacteria Affect Us?

Good bacteria help us stay healthy by helping with digestion and fighting bad bacteria.

Bad bacteria can make us sick (like when we get food poisoning or a sore throat).

How Do We Fight Bad Bacteria?

Antibiotics: Special medicine that kills bad bacteria.

Washing Hands: Washing your hands keeps bad bacteria away.

Vaccines: Some vaccines help protect us from bacteria-caused diseases.

Types of Materials:

Natural Materials: These come from nature.

Examples:

Wood (from trees)

Cotton (from plants)

Stone (from the earth)

Wool (from sheep)

Man-made Materials: These are made by people, often by changing natural materials.

Examples:

Plastic (made from chemicals)

Glass (made from sand)

Paper (made from wood or plants)

Metal (like iron, aluminum)

Properties of Materials:

Different materials have different properties, which describe how they look and how they behave. Here are some important properties:

Hard or Soft:

Hard: Materials like stone or metal are hard.

Soft: Materials like cotton or wool are soft.

Flexible or Rigid:

Flexible: Materials like rubber or cloth can bend easily.

Rigid: Materials like wood or metal don’t bend easily.

Heavy or Light:

Heavy: Materials like stone or metal are heavy.

Light: Materials like foam or plastic are light.

Waterproof or Absorbent:

Waterproof: Materials like plastic and rubber do not absorb water.

Absorbent: Materials like cloth and sponges can soak up water.

Smooth or Rough:

Smooth: Materials like glass or metal feel smooth.

Rough: Materials like stone or sandpaper feel rough.

Choosing Materials for Different Uses:

When we make things, we choose the right material based on what we need it to do. For example:

A raincoat needs to be made from waterproof material (like plastic or rubber).

A chair needs to be made from a strong material (like wood or metal).

A towel needs to be made from absorbent material (like cotton).

Activity Ideas:

Materials Hunt: Have students look around the room or outside for different materials. They can list materials like wood, plastic, glass, etc., and describe their properties.

Material Sorting: Give students a mix of objects made from different materials (like a plastic spoon, wooden pencil, metal coin, and cotton cloth). Ask them to sort them based on their properties (hard/soft, smooth/rough, etc.).

Summary:

Materials are things used to make objects, and they can be natural or man-made.

Materials have different properties: like being hard, soft, light, heavy, or absorbent.

We choose materials based on what we need them to do (like waterproof for raincoats or absorbent for towels).

The Life Cycle of a Plant:

Seed:

Every plant starts as a seed. Seeds come in different sizes and shapes.

A seed contains everything the plant needs to grow, including a tiny plant inside called the embryo.

Germination:

When the seed gets water, warmth, and air, it starts to germinate (begin to grow).

The seed splits open, and a tiny root (called the radicle) grows downward into the soil, while a tiny shoot (the plumule) grows upwards towards the light.

Seedling:

After germination, the plant becomes a seedling. This is a young plant that has just started growing its roots, stem, and leaves.

The seedling needs sunlight, water, and nutrients from the soil to grow.

Mature Plant:

As the plant grows, it becomes a mature plant. It has a strong root system, a tall stem, and many leaves.

The plant starts making flowers.

Flowering:

Flowers are very important because they are where plants make seeds. Flowers contain the reproductive parts of the plant (like pollen and ovules).

Flowers need pollinators like bees, butterflies, and wind to help them make seeds.

Fruiting:

After pollination, the flower turns into a fruit. The fruit contains seeds, which can grow into new plants.

Some plants make fruits that we can eat, like apples, bananas, and tomatoes!

Seed Dispersal:

The plant's seeds are spread to different places in different ways:

By the wind (like dandelions).

By animals (seeds stick to their fur or are eaten and then passed out).

By water (seeds can float on water to new places).

New Seed:

The seeds that get to a good place (with soil, sunlight, and water) will start to grow again, repeating the cycle.

Activity Ideas:

Plant a Seed: Have students plant a seed in a small pot and watch it grow. Record its changes each day (germination, seedling, mature plant).

Life Cycle Diagram: Ask students to draw the life cycle of a plant, labeling each stage from seed to mature plant and flowering.

Seed Dispersal Experiment: Take different types of seeds (like a dandelion, apple seed, or peanut) and discuss how they are spread by wind, animals, or water.

Summary:

The life cycle of a plant goes from seed to germination, to seedling, to mature plant, to flowering, to fruiting, and finally to seed dispersal.

Plants make seeds that grow into new plants, starting the cycle again!

General Stages of an Animal Life Cycle:

Birth:

Every animal starts as a baby. Some animals are born from eggs, while others are born as live babies.

Examples:

Eggs: Birds, frogs, and reptiles (like turtles) lay eggs.

Live babies: Humans, dogs, and cats give birth to live babies.

Young/Immature Stage:

After birth, the animal is still growing and changing. It’s in the young or immature stage.

The animal might look like a smaller version of the adult but is not fully grown.

Example: A puppy grows into a dog, or a caterpillar turns into a butterfly.

Growth:

During this stage, the animal gets bigger and stronger. It goes through changes to become an adult.

Example: A chick grows into a hen or a lion cub grows into a lion.

Reproduction:

Once the animal reaches adulthood, it can reproduce. This means it can have babies or lay eggs to start a new generation.

Example: A cow becomes an adult and can have calves (baby cows).

Old Age/Death:

Eventually, animals get older. As they get older, their bodies slow down, and they eventually die.

Example: An old dog may become slower and eventually pass away.

Different Life Cycles of Animals:

Animals can have different types of life cycles based on their species. There are two main types:

Direct Life Cycle (No Metamorphosis):

In animals like humans, dogs, and cats, the young look very much like the adult.

They grow bigger and stronger until they reach adulthood.

Example: A baby dog (puppy) looks like a small version of the adult dog, just smaller and growing.

Indirect Life Cycle (With Metamorphosis):

Some animals, like frogs, butterflies, and flies, go through metamorphosis. This means they have different stages of development, and they look completely different as babies than they do as adults.

Stages of Metamorphosis:

Egg: The animal starts as an egg.

Larva (baby): The egg hatches into a baby form that looks different from the adult. For example, a caterpillar is the larva of a butterfly.

Pupa: The larva goes into a resting stage (called a pupa or chrysalis), where it changes into an adult.

Adult: Finally, the animal becomes an adult and can reproduce.

Example: A butterfly starts as an egg, becomes a caterpillar (larva), changes into a pupa, and then grows into an adult butterfly.

Animal Life Cycle Examples:

Frog Life Cycle:

Egg → Tadpole (larva) → Froglet → Adult Frog.

Butterfly Life Cycle:

Egg → Caterpillar (larva) → Chrysalis (pupa) → Adult Butterfly.

Human Life Cycle:

Baby (newborn) → Child → Teenager → Adult → Old Age.

Summary:

Animals, like plants, go through a life cycle that includes birth, growth, reproduction, and death.

Some animals grow directly into adults, while others go through metamorphosis (like frogs or butterflies).

Reproduction is an important part of the life cycle because it starts the cycle over again with new babies.

Types of Magnets:

Natural Magnets:

These magnets occur naturally in nature. Lodestone is a natural magnet, and it can attract objects like iron.

Artificial Magnets:

These are magnets made by humans. We can make a magnet by rubbing a piece of iron or steel with a strong magnet. These magnets can be temporary (they lose their magnetism) or permanent (they stay magnetic for a long time).

Magnetic Poles:

Every magnet has two poles:

The North pole and the South pole.

Opposite poles attract: The North pole of one magnet attracts the South pole of another magnet.

Same poles repel: The North pole of one magnet repels the North pole of another magnet.

Magnetic Field:

A magnetic field is an invisible area around a magnet where it can attract or repel other magnetic materials. You can think of it like an invisible force that surrounds the magnet.

Materials That are Magnetic:

Some materials are attracted to magnets. These include:

Iron

Nickel

Cobalt

Materials that are not magnetic include:

Wood

Plastic

Glass

Uses of Magnets:

Magnets are used in many everyday objects:

Refrigerator magnets (to stick things on the fridge).

Compass (to find direction, using Earth's magnetic field).

Motors (to make things move, like in toys or fans).

Magnetic levitation trains (trains that float above the track using magnets).

Simple Magnet Experiment:

What materials are magnetic?

Take a magnet and test it on different materials (like paperclips, coins, wood, and plastic). You’ll notice that it attracts metals like iron but not non-metal materials like wood.

Attraction and Repulsion:

Try to push the same poles of two magnets together (e.g., North to North). You’ll see that they push away from each other.

Try to push opposite poles (e.g., North to South), and you'll see that they attract each other.

Summary:

Magnets attract certain materials, like iron, nickel, and cobalt.

They have two poles: North and South. Opposite poles attract, while the same poles repel.

Magnets create an invisible magnetic field around them.

Uses of magnets include fridge magnets, compasses, and motors.