🌱 Class 6 Science Notes (Easy & Simple)
Covers the important concepts from the NCERT Class 6 Science book.
📘 Chapter 1: Food – Where Does It Come From?
What is food?
Food gives us energy, helps us grow, and keeps us healthy.
Sources of food:
- Plants: Fruits, vegetables, grains, pulses, nuts.
- Animals: Milk, eggs, meat, fish, honey.
Plant parts we eat:
- Roots: Carrot, beetroot
- Stem: Potato, sugarcane
- Leaves: Spinach, cabbage
- Flowers: Cauliflower
- Seeds: Beans, peas
Animals based on food habits:
- Herbivores: Eat only plants → cow, goat
- Carnivores: Eat meat → tiger, lion
- Omnivores: Eat both → humans, bears
📘 Chapter 2: Components of Food
Nutrients in food:
- Carbohydrates: Give energy (rice, chapati, sugar)
- Proteins: Build muscles (milk, dal, eggs)
- Fats: Extra energy (butter, oil, nuts)
- Vitamins & Minerals: Protect from diseases
- Roughage: Helps digestion (salad, vegetables)
- Water: Keeps our body hydrated
Balanced Diet:
A diet that has all nutrients in the right amount.
📘 Chapter 3: Fibre to Fabric
Types of fibres:
- Natural fibres: From nature → cotton, jute, wool, silk
- Synthetic fibres: Man-made → nylon, polyester
How cotton becomes fabric:
Cotton → Ginning → Spinning → Weaving → Cloth
Wool & Silk:
Wool comes from sheep, goats.
Silk comes from silkworm cocoons.
📘 Chapter 4: Sorting Materials into Groups
We sort things based on properties like:
- Appearance: shiny, dull
- Transparency: transparent, translucent, opaque
- Solubility: dissolves in water or not
- Floating/sinking: some float (wood), some sink (stone)
📘 Chapter 5: Separation of Substances
Why separate?
To remove impurities or get useful materials.
Methods:
- Hand picking: removing stones from grains
- Sieving: flour sifted to remove bigger particles
- Winnowing: separating husk from grain
- Sedimentation & Decantation: mud settles down → pour clean water
- Filtration: using filter paper
- Evaporation: salt from seawater
📘 Chapter 6: Changes Around Us
Types of changes:
- Reversible: can be undone → melting ice
- Irreversible: can’t be undone → burning paper
- Expansion/Contraction: things expand on heating and contract on cooling
📘 Chapter 7: Getting to Know Plants
Types of plants:
- Herbs: small, soft (mint)
- Shrubs: medium, woody (rose)
- Trees: tall, strong (mango)
Parts of plant:
- Root, stem, leaves, flowers.
Leaf work:
Leaves prepare food using sunlight — photosynthesis.
📘 Chapter 8: Body Movements
Bones + Muscles help us move.
Important points:
- Humans have many bones joined at joints.
- Types of joints:
- Ball & socket → shoulder
- Hinge joint → knee
- Fixed joints → skull
- Earthworms, snakes, fish, birds move differently because of body structures.
📘 Chapter 9: The Living Organisms – Characteristics
Living things:
- Need food
- Grow
- Move
- Respond
- Breathe
- Reproduce
- Excrete waste
Non-living things do not show these features.
📘 Chapter 10: Motion & Measurement of Distances
- Motion: moving things → straight, circular, periodic.
- Measurement: using standard units like meter, centimeter.
- Tools: scale, measuring tape.
📘 Chapter 11: Light, Shadows & Reflections
- Light travels in a straight line.
- Shadow forms when light is blocked.
- Reflection: when light bounces off a surface (mirror).
📘 Chapter 12: Electricity & Circuits
- Electricity flows in a closed circuit.
- Components: cell, bulb, wires, switch.
- Conductors allow electricity (metal); insulators don’t (plastic).
📘 Chapter 13: Fun with Magnets
- Magnets attract iron.
- Has two poles: North & South.
- Like poles repel; unlike poles attract.
- Magnetic materials → iron, nickel, cobalt.
📘 Chapter 14: Water
- Water cycle: Evaporation → Condensation → Rainfall
- States of water: solid, liquid, gas.
- Need to save water.
📘 Chapter 15: Air Around Us
Air contains:
Nitrogen, Oxygen, Carbon dioxide, Water vapor, Dust.
Plants give us oxygen through photosynthesis.
📘 Chapter 16: Garbage In, Garbage Out
- Biodegradable waste → fruit peels
- Non-biodegradable → plastic
- Reduce, Reuse, Recycle (3Rs)
- Composting helps reduce waste