Topics
Crop Production and Management
- Crop and Its Types
- Soil Formation and Preparation for Agriculture
- Agricultural Implements
- Manuring (Biomanuring)
- Fertilizers
- Methods to Replenish Nutrients in Your Soil
- Improved methods of agriculture
- Food Security
- Weeding
- Harvesting of Crops
- Storage of Food Grains
- Animal Products used as Food
Microorganisms: Friend and Foe
Synthetic Fibres and Plastics
- Fibre
- Fabrics
- Man-made Fibre: Synthetic Fibres
- Rayon
- Nylon
- Dacron, Terylene, Terene
- Man-made Fibre: Plastics
- Biodegradable Plastics
- Harmful Effects of Plastics
- Recycling of Plastic
Coal and Petroleum
- Energy Resources > Conventional energy resources or non-renewable energy resources
- Carbon: A Versatile Element
- Special Features of Carbon
- Non-crystalline/Amorphous Forms: Coal
- Extraction of Coal
- Non-crystalline/Amorphous Forms: Coke
- Petroleum
- Refining of Crude Petroleum
- Conventional Sources of Energy > Natural Gas
- Some Natural Resources Are Limited
Materials: Metals and Non-metals
Combustion and Flame
- Chemical Properties of Carbon Compounds > Combustion
- Precautions and Safety Measures
- Types of Combustion
- Flame
- Fuel
- Types of Fuel
- Fuel Efficiency
Conservation of Plants and Animals
- Deforestation and Its Causes
- Consequences of Deforestation
- Conservation of Forests
- Conservation of Wildlife
- Endemic Species
- Migration
- Recycling of Paper
- Reforestation
Reproduction in Animal
- Fertilization in Human
- Embryo Formation in Viviparous and Oviparous Animals - Young Ones to Adults
Reaching the Age of Adolescence
- Secondary Sex Characteristics
- Role of Hormones in Initiating Reproductive Function
- Reproductive Phase of Life in Humans
- Hormones Other than Sex Hormones
- Role of Hormones in Completing the Life History of Insects and Frogs
- Nutritional Needs of Adolescents
- Personal Hygiene for Adolescence
Cell - Structure and Functions
Force and Pressure
- Force
- Force - Push or Pull
- Forces Are Due to an Interaction
- Exploring Forces
- A Force Can Change the State of Motion
- Force Can Change the Shape of an Object
- Effect of Force
- Types of Forces>Contact and Non-Contact Forces
- Thrust and Pressure
- Pressure of liquid
- Factors Affecting Liquid Pressure
- Atmospheric Pressure
Friction
- Force of Friction
- Factors Affecting Friction
- Friction - A Necessary Evil
- Effects of Friction
- Increasing and Reducing Friction
- Fluid Friction
Sound
Chemical Effects of Electric Current
- Conductor of Electricity: Liquid
- Electricity
- Chemical Effects of Electric Current
- Electrical Conduction in Solids
Some Natural Phenomena
- Lightning and Lightning Safety
- Force of Friction
- Electric Charge
- Types of Charges and Their Interaction
- Transfer of Charges
- Electroscope
- Lightning and Lightning Safety
- Earthquake
- Protection Against Earthquakes
Light
- Climatic Factors > Light
- Reflection of Light
- Terms Used in Reflection of Light
- Law of Reflection of Light
- Types of Reflection
- Multiple Reflections
- Prism
- Dispersion of Light
- The Human Eye
- Care of the Eyes
- Visual Impairment and Braille System
Star and Solar System
Pollution of Air and Water
- Pollution
- Case Study: The Taj Mahal
- Green House Effect
- Preventive Measures of Green House Effect
- Preventive Measures of Global Warming
- Case Study: Ganga Pollution and Ganga Action Plan
- Potable Water
- Purification of Water
Maharashtra State Board: Class 6
Various Uses of Changes in Physical State:
| Use Case | Material Used | Change in State | Process | Benefits of This Change |
| Making Candles | Paraffin wax | Solid to liquid | Paraffin wax is heated until it melts. Once it is in liquid form, it is poured into moulds. As it cools, it solidifies into the shape of the candle. | Enables the creation of versatile candle designs for lighting and decoration. |
| Using Dry Ice in Food Preservation and Preparation | Solid carbon dioxide (dry ice) | Solid to gas (sublimation) | Dry ice is used to keep ice cream frozen during transport because it is much colder than regular ice. It can also be used to make ice cream by quickly freezing the cream mixture. | Maintains the cold temperature of ice cream without moisture, preventing mess and contamination. |
| Liquid Nitrogen in Animal Husbandry | Liquid nitrogen | Liquid to gas | Liquid nitrogen is extremely cold and is used to freeze and store biological material like sperm and eggs in animal breeding programs. | Preserves biological materials effectively without cellular damage, crucial for successful animal breeding. |
| Making Glass from Sand | Sand (primarily composed of silica) | Solid to liquid | Sand is heated to very high temperatures until it melts into a liquid. This liquid is then shaped and cooled to form glass. | Allows for the production of a wide range of glass products, from windows to bottles. |
| Melting Metals to Make Ornaments | Gold, silver | Solid to liquid | Metals like gold and silver are melted so they can be poured into moulds to create jewellery and ornaments. | Facilitates intricate jewellery designs, enhancing aesthetic appeal and value. |
| Melting Iron to Make Tools | Iron | Solid to liquid | Iron is melted in a furnace and then poured into moulds to make various tools and machinery parts. | Produces strong and durable tools essential for construction and manufacturing industries. |
Related QuestionsVIEW ALL [67]
Write whether the given materials are hard or soft.
| Wood | Eraser | Cotton |
| ______ | ______ | ______ |
