Class 3 Exam > Class 3 Notes > Science Class 3 ICSE > Chapter Notes: Forms of Matter
Forms of Matter Chapter Notes | Science Class 3 ICSE PDF Download
| Table of contents |
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| Introduction |
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| Forms of Matter and their Properties |
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| Uses of Matter in Our Daily Life |
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| Different Forms of Water |
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Introduction
The chapter "Forms of Matter" introduces the concept of matter, which includes everything around us that has mass and occupies space. It explains the three states of matter—solids, liquids, and gases—and their unique properties. The chapter also covers how these forms are used in our daily lives and includes activities to demonstrate their characteristics, such as how liquids take the shape of containers and gases fill available space. Additionally, it highlights the different forms of water and their importance.- Matter is anything that has mass and takes up space.
- Mass shows how heavy or light an object is.
- Examples of light objects: eraser, sharpener, scale.
- Examples of heavy objects: book, bag, water bottle.
- All objects occupy space, like clothes in a cupboard, books on a table, or a person on a chair.
- Matter includes both living and non-living things.
Forms of Matter and their Properties
Matter is found in three distinct states: solids, liquids, and gases, each exhibiting unique characteristics and properties
Properties of Solids
- Solids have a fixed shape and size.
- Shape or size of solids changes only when broken or cut with force.
- Solids do not flow.
- Some solids are hard, others are soft.
- Examples of hard solids: table, chair, pen, pencil, floor, glass bottle.
- Examples of soft solids: plastic bottle, wool, clothes, flowers, paper.
- Hard solids cannot be bent or scratched easily.
- Hard solids keep their shape when pressed or moved.
Properties of Liquids
- Liquids do not have a fixed shape.
- Liquids take the shape of the container they are poured into.
- Liquids flow easily.
- Liquids can be poured or spilled, unlike solids.
- Examples of liquids: water, milk, fruit juice, oil.
Properties of Gases
- Gases do not have a fixed shape or size.
- Gases spread to fill all the space in a closed container.
- Most gases are colorless and cannot be seen.
- Gases are present in the air around us.
- Examples of gases: oxygen (we breathe in), carbon dioxide (we breathe out).
- Air is a mixture of gases surrounding the Earth.
Uses of Matter in Our Daily Life
All forms of matter (solids, liquids, gases) are important in daily life.- Solids: Used in food we eat, houses we live in, clothes we wear, and materials to build houses.
- Liquids: Water is essential for drinking, bathing, cleaning, cooking, and watering plants.
- Other useful liquids: oil, milk, tea, coffee, fruit juices.
- Gases: Oxygen in air is needed for breathing.
- Carbon dioxide we breathe out is used by plants.
- Gases are used to fill balloons, tyres, and footballs.
- Gases like CNG are used as fuel for vehicles and for cooking food.
Different Forms of Water
- Water is the most important liquid on Earth.
- Water exists in different forms (as a liquid, solid, or gas).
- Water is essential for survival and used in many activities.
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FAQs on Forms of Matter Chapter Notes - Science Class 3 ICSE
| 1. What are the three main forms of matter? |  |
Ans. The three main forms of matter are solids, liquids, and gases. Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor a definite volume.
| 2. How does water exist in different forms? | |
Ans. Water exists in three forms: solid (ice), liquid (water), and gas (water vapor). Ice is formed when water freezes and becomes solid. Liquid water is what we commonly use for drinking, cooking, and cleaning. Water vapor is the gaseous form of water that we can see as steam or fog.
| 3. What are some common uses of matter in our daily life? | |
Ans. Matter is used in many ways in our daily life. For example, solids are used for building materials (like wood and metal), liquids are used for drinking and cooking (like water and oil), and gases are used for heating (like natural gas) and breathing (like oxygen).
| 4. Why is it important to understand the properties of different forms of matter? | |
Ans. Understanding the properties of different forms of matter helps us to use them effectively in our daily lives. For instance, knowing that solids hold their shape helps us choose the right materials for construction, while knowing that liquids can flow helps us in cooking and cleaning.
| 5. How does temperature affect the states of water? | |
Ans. Temperature significantly affects the states of water. When the temperature drops below 0 degrees Celsius, water freezes and becomes ice. At 0 degrees Celsius to 100 degrees Celsius, water remains in liquid form. When the temperature rises above 100 degrees Celsius, water evaporates and turns into steam or water vapor.
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