🌱 PLANT CELL

A plant cell has several important parts. Each part has a special function that helps the cell work properly.

🧱 Cell Wall

• Gives the cell support and protection.

• Helps keep the cell’s shape.

🚪 Cell Membrane

🧫 animal Cell

A cell is the basic unit of life. Our body is made of many cells.

🔬 Main Parts

• Cell membrane — Controls what goes in and out.

• Cytoplasm — Where many cell activities happen.

• Nucleus — Controls the cell and stores DNA.

💪 Muscle Contraction and Relaxation

💪 Muscle Contraction

Muscle contraction is the process in which a muscle becomes shorter and thicker to create movement. It starts when the brain sends a signal through a nerve to the muscle. The muscle then begins to work, and tiny proteins called actin and myosin slide over each other. This makes the muscle shorten. The shortened muscle pulls the tendon, which pulls the bone, causing movement.

😌 Muscle Relaxation

Muscle relaxation is the process in which the muscle returns to its normal length after movement. The brain stops sending the signal, so the muscle stops pulling. The muscle fibers return to their normal position, the tendon stops pulling the bone, and the muscle is ready for the next movement.

🌟 Simple Process

muscles

Muscles are soft tissue. Muscles produce movement. They work by contracting and relaxing.

types of muscles

• Skeleton muscles.

• smooth muscles.

• cardiac muscles.

Process of Decomposition

1. 🌿 A plant or animal dies.

2. 🦠 Bacteria and fungi start breaking it down.

3. 🍂 It changes into simple nutrients.

4. 🌱 The nutrients go into the soil.

5. 🌼 Plants use the nutrients to grow.

how ear work

It all starts with outer ear. Pinna collects sound waves. Pinna helps travel sound waves to ear canal. Ear canal helps sound to travel to eardrum.When the sound wave hits the eardrum, eardrum, it will vibrate. three bones.The first hammer An anvil.And stapes. From the first tiny bone, it receive vibration from the eardrum. Second, anvil the second tiny bone, it passes the vibration to the stapes.Trap, the smallest bone in the human body. It pushes vibration to the cochlea cochlea The cochlea is a small, spiral-shaped part inside your inner ear. Contains the cochlea and organs for balance.

Helps you hear and stay balanced.

💓 Heart After Death

🛑 What happens?

• When a person dies, the body stops working

• But the heart can still move a little for a short time

⏱️ Why?

• The heart has its own “tiny battery system”

Water present in the atmosphere as:

• Clouds

• Water vapor

• Rain

• Snow

Importance:

Water stored underground in rock and soil layers called aquifers.

Benefits:

• Reliable source during droughts

• Usually cleaner than surface water

Challenges:

• Over-pumping

Global Distribution of Water

• About 97% is saltwater in oceans.

• About 3% is freshwater.

• Most freshwater is locked in glaciers, ice caps, or deep underground.

• Less than 1% of freshwater is easily accessible in rivers, lakes, and shallow groundwater.

  
  

What Are Water Resources?

Water resources are all sources of water that can be used by humans, animals, plants, and ecosystems.

what is ecosystems.

living things that live together

Although water covers about 71% of Earth's surface, only a small fraction is available as fresh water for direct human use

Water resources are sources of water that people, animals, and plants use.

Main Water Resources

• Rivers

• Lakes

• Oceans and seas

• Groundwater (water under the earth)

What does water contain?

Water is made 2 hydrogen atoms and one oxygen atom

Why do we drink water?

• stay hydrated

• keep the body cool

• help digestion

what happens when food goes in to your body

• Food enters the mouth 👄

• Teeth chew the food into small pieces

• Saliva helps start digestion

• Food moves down the food pipe

• The stomach breaks food down with juices 🫃

How to make a healthy fat in our body?

Your body can make some fats by itself, but you also need to eat healthy foods to have healthy fat in your body.

Healthy fats help:

• 🧠 Brain growth

• ❤️ Heart health

• 💪 Energy

Why do we eat carbs every day?

We eat carbs every day because carbohydrates give our body energy.

🍞 Carbs are like fuel for the body.

They help us:

• 🧠 Think and learn

WHAT is DNA

DNA is like a tiny instruction book inside your body 📖

🔑 Key Points:

Full name: Deoxyribonucleic Acid

Found in almost every cell in your body

Tells your body how to grow, look, and work

🐕 What is a play bow?

A play bow is when a dog:

puts its front legs down

keeps its back up

often wags its tail

👉 It looks like the dog is “bowing” like this:

🦠 Diseases caused by bacteria

1. Common cold throat infection (Strep throat)

2. Food poisoning

3. Typhoid

4. Tuberculosis (TB)

5. Cholera

water cycle 🍃

• the sun heats water.

• water turns into vapour.

• vapour rises and forms clouds.

• clouds cool and give rain.

• rainwater goes back into river and lakes.

1. Asexual reproduction is a biological process where a single parent creates genetically identical offspring (clones) without the fusion of gametes (sperm/egg) or mixing of DNA, common in single-celled organisms, plants, fungi, and some animals, allowing rapid population growth but lacking genetic diversity.

   
   

2. Methods include binary fission (bacteria), budding (yeast), fragmentation (starfish), vegetative propagation (plants), and parthenogenesis (some lizards).

what is Asexual reproductive

1. Asexual reproduction is a method where a single parent produces genetically identical offspring (clones) without the fusion of gametes (sperm and egg), allowing rapid multiplication and growth in stable environments, common in bacteria, plants, fungi, and some animals via processes like budding, fission, and fragmentation.

mind map

About Active transport

Active transport is a special way that tiny parts, called molecules, move into and out of cells. Imagine a cell as a house with a fence around it. Active transport is like bringing groceries into the house even when there are already a lot of groceries inside. It means moving molecules from a place where there are fewer of them to a place where there are more.

This kind of movement needs energy. Cells often get this energy from a special molecule called adenosine triphosphate (ATP). Cells use active transport to get important things they need, like ions (tiny charged particles), glucose (sugar for energy), and amino acids (building blocks for proteins).

Normally, molecules like to spread out from a crowded area to a less crowded area. Think of a drop of food coloring spreading in water. But with active transport, cells do the opposite! They pull…

how organism helps in our body

1. Tiny helpers, called microorganisms (like good bacteria), live in and on us, helping digest food, make vitamins (K), train our immune system to fight sickness, protect skin, and even make yogurt taste yummy, showing that most "germs" are super friends keeping our bodies strong and healthy.

keywords

• Cells

• Tissues

what is organism

1. What is an Organism | Definition of OrganismAn organism is any individual living thing, from the smallest bacteria to the largest whale, that functions as a distinct unit, carrying out life processes like growth, reproduction, metabolism, and response to stimuli, often composed of one or more cells.

2. They are the basic units of ecology, interacting with each other and their environment.

key points

• Cellular Structure

• Energy & Metabolism

Define Photosynthesis:-

Photosynthesis is how green plants make their own food (sugar) using sunlight, water, and air (carbon dioxide), releasing oxygen for us to breathe. Making food for the plant and keeping the air fresh.

• Plants make their food using sunlight, water, carbon dioxide and nutrients and minerals from the soil. This process is called photosynthesis.

• Chlorophyll, a green color pigment, present in leaves helps plant in absorbing energy of light.

• Plants leaves have small pores called as stomata. Each stoma is guarded by 2 sausage-shaped cells called as guard cells. Guard cells help in opening and closing of stoma.

• Plant exchange gases through stomata. Stomata are found on the underside of leaves.

1. Nutrients come from a variety of food sources, including fruits, vegetables, lean meats, fish, whole grains, dairy products, legumes, nuts, and seeds.

2. A balanced diet that includes a variety of these foods is the best way to get the essential nutrients your body needs, like carbohydrates, proteins, vitamins, minerals, and fats.

Macronutrients

1. Carbohydrates: Found in grains, fruits, vegetables, and dairy products, these are a primary source of energy.

2. Proteins: Sources include meat, fish, eggs, dairy products, beans, and legumes. Protein is essential for growth and repair of body tissues.

3. Fats: Healthy fats are found in foods like nuts, seeds, and fish.

inside the earth

1. The inside of the Earth is composed of three main layers: the crust, the mantle, and the core.

2. The crust is the thin outer layer, the mantle is the thick layer below it, and the core is the innermost layer. These layers are primarily made of rock, with the core being mainly iron and nickel.

layers of the earth

1. The four main layers of the Earth are the crust, mantle, outer core, and inner core. The crust is the thin, rocky outer layer, while the mantle is the thick, semi-solid middle layer

2. The core is the innermost layer, consisting of a liquid outer core and a solid inner core made of metal.

what is nutrition

1. Nutrition is the study of nutrients in food and how the body uses them for growth, energy, and repair.

2. It is the process of consuming food to support life, and involves the intake, digestion, absorption, and use of substances like carbohydrates, proteins, fats, vitamins, minerals, and water. A balanced intake of these nutrients is essential for proper health, and imbalances can lead to disease.

Key nutritional points

• Essential nutrients

• Macronutrients

1. What Earth Is

Earth is the third planet from the Sun, the only known world with liquid water on its surface and life in incredible diversity.

2. Basic Facts

• Age: ~4.54 billion years

• Diameter: ~12,742 km

• Surface: ~70% ocean, ~30% land

what is microbiology

1. Microbiology is the scientific study of microorganisms, which are organisms too small to be seen with the naked eye, including bacteria, viruses, fungi, and other microbes.

2. It examines how these microbes grow, their structure, genetics, and how they interact with their environment and other living things, including their roles in causing disease, benefiting health, and supporting ecosystems

types of microbiology

1. Bacteriology

2. Virology

1. Respiration is the process by which living organisms exchange gases to produce energy, and it has two main aspects: breathing (external respiration) and cellular respiration.

2. . Breathing is the mechanical process of inhaling oxygen and exhaling carbon dioxide, while cellular respiration is the chemical process within cells that breaks down glucose to release energy, with oxygen acting as a key component in aerobic respiration.

Breathing (External Respiration)

• Function: To bring oxygen (\(O_{2}\)) from the atmosphere into the lungs and expel carbon dioxide (\(CO_{2}\)) from the lungs.

• Process: Involves the intake of air, diffusion of gases across the alveolar and capillary membranes, and the transport of gases by the blood to and from the body's cells.

• Mechanism: Achieved through the coordinated actions of the respiratory system, including the nose, mouth, trachea, bronchi, lungs, and diaphragm.

kingdom : bullet points

• kingdoms group living .

• main types : Bacteria, protists, fungi, plant, animal .

• Bacteria : tiny, no nucleus .

• fungi : mushrooms, absorb food .

• plants : make food from sunlight .

types of bones

1. Long bones – long and help in movement

Example: femur, humerus

2. Short bones – small and cube-shaped

Example: wrist, ankle bones

3. Flat bones – flat and protect organs

what is lifespan of animals

the length of time that something is likely to live, work, last, etc.

A leaf is structured with a blade (lamina) for photosynthesis, attached to the stem by a petiole

External parts

Blade (Lamina): The broad, flat part of the leaf that captures sunlight.

Petiole: The stalk that connects the leaf blade to the stem.

Veins: A network of vascular tissues that transport water, nutrients, and sugars, and provide structural support. The main vein is the midrib.

Stipules: Small, leaf-like appendages that may be found at the base of the petiole.

dog -pappy - adolescence- adult hood

fish-egg-larva-fry-adult

lion-cub-sub adult -adult

fox-kit-pup-sub adult-adult fox

a cell is the basic unit of life.

cell is made up of some components.

1.cell membrane

2 .mitochondria

3 .ribosomes

4 .nucleus

1. what is the importance of osmosis

Osmosis is vital for life because it maintains homeostasis by balancing water levels in cells and helps in the transport of nutrients and waste in both plants and animals. For plants, it is crucial for roots to absorb water from the soil and for maintaining turgor pressure. For animals, it is essential for kidney function, nutrient absorption in the intestines, and general fluid balance within and around cells.

2.where we can see osmosis

You can see osmosis in many natural and man-made processes, such as plants absorbing water through their roots, the way your fingers get pruney in a long bath, and the functioning of animal cells in processes like water absorption in the intestines and kidney function. It's also a key principle behind food preservation, such as with jams and cured meats, and is used in water purification through reverse osmosis.

1. Immune system will protect you.

2. but sometimes, your immune system gets weak.

A cell is the basic structural and functional unit of all living organisms, acting as the smallest unit of life that can replicate on its own. Every living thing, from single-celled bacteria to complex animals and plants, is made of cells. Cells have three main components: a cell membrane, a nucleus, and cytoplasm. They also contain organelles, which are specialized structures that perform specific functions like creating energy, making proteins, and storing genetic material.

The digestive system breaks down food into smaller pieces so the body can use the energy and nutrients. The process starts in the mouth, where food is chewed and mixed with saliva. From there, it travels down the esophagus (food pipe) to the stomach, a muscular bag that churns food with digestive juices. Next, food moves into the small intestine where it's absorbed into the blood with help from the liver and pancreas. The large intestine absorbs extra water from the remaining waste, which is then eliminated from the body through the anus.

The water cycle is the continuous movement of water on, above, and below the Earth's surface, driven by the sun's energy. Key biological and physical processes include evaporation (liquid to vapor), condensation (vapor to clouds), and precipitation (rain, snow, etc.). Other vital processes are transpiration from plants, runoff and infiltration into the ground, and sublimation (ice to vapor). This cycle is essential for life, constantly recycling water between the atmosphere, land, and oceans.

Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons. This difference in neutrons means they have different atomic masses. While isotopes have nearly identical chemical properties, their different masses can lead to different physical properties. 

Good nutrition for kids involves a balanced diet from all five food groups: protein, dairy, grains, fruits, and vegetables, with a focus on whole grains and lean proteins. Key nutrients like vitamins A and C, calcium, iron, and fiber are vital for growth and development, and can be found in a variety of healthy foods like fruits, vegetables, and whole grains. Limiting processed foods, added sugars, and excess salt is also important.

A food pyramid is a visual guide that shows the recommended daily intake of different food groups for a healthy, balanced diet.

A human cell is the basic unit of life, and the human body is made of trillions of them. Each cell has a membrane, a nucleus, and cytoplasm, and performs specialized functions like providing structure, converting food to energy, and storing genetic material. These cells are highly complex, with many internal organelles like mitochondria for energy and ribosomes for making proteins. 

The main parts of the body include the head, trunk (or torso), and limbs (arms and legs). The head contains sensory organs like the eyes, ears, nose, and mouth, while the trunk includes the shoulders, chest, back, and abdomen. The limbs are the extremities: the arms with hands and fingers, and the legs with feet and toes.  

The skeletal system is the body's support structure, composed of bones, cartilage, ligaments, and other connective tissues. It provides shape, protects organs, facilitates movement, stores minerals, and produces blood cells. An adult human skeleton has 206 bones, which are divided into two main parts: the axial skeleton (skull, vertebral column, and rib cage) and the appendicular skeleton (limbs and girdles).  

I learn about kidneys i made experiment of kidneys.

I learn about lungs

The digestive system is made up of: the alimentary canal (also called the digestive tract). This long tube of organs makes a pathway for food to travel through the body. It runs from the mouth to the anus (where poop comes out) and includes the esophagus, stomach, and intestines.

skin layer

I learnt about parts of Eyes