What is Matter?
Matter is anything that has mass and occupies space.
Everything around us is made of matter. A book, a stone, water, air, plants, animals, and our bodies are all examples of matter.
Matter includes both visible and invisible substances. Air is matter even though we cannot see it, because air has mass and occupies space.
Matter can exist in different forms. It may be solid, liquid, or gas. The form of matter depends on how its particles are arranged and how they move.
Matter is one of the most basic ideas in Physics because it helps us understand the substances and objects around us.
Matter Has Mass
Mass is the amount of matter present in a body.
An object with more matter usually has more mass.
For example, a large stone has more mass than a small stone because it contains more matter.
Mass is measured using a balance. The SI unit of mass is the kilogram.
Examples:
- A book has mass.
- A glass of water has mass.
- A ball has mass.
- Air also has mass.
So, if something has mass, it may be matter.
Matter Occupies Space
Matter occupies space. This means it takes up room.
- A chair occupies space in a room.
- Water occupies space in a bottle.
- Air occupies space inside a balloon.
When air is blown into a balloon, the balloon becomes bigger. This shows that air occupies space.
Even gases, which are often invisible, occupy space.
Matter is Made of Particles
Matter is made up of very tiny particles.
These particles are too small to be seen with our eyes.
The particles of matter are always moving. The way they move depends on the state of matter.
In solids, particles are closely packed.
In liquids, particles are close together but can move around.
In gases, particles are far apart and move freely in all directions.
The arrangement and movement of particles decide whether matter behaves as a solid, liquid, or gas.
States of Matter
Matter commonly exists in three main states:
- Solid
- Liquid
- Gas
A solid has a fixed shape and fixed volume.
A liquid has a fixed volume but no fixed shape. It takes the shape of the container.
A gas has no fixed shape and no fixed volume. It spreads out and fills the available space.
Examples:
- Ice is a solid.
- Water is a liquid.
- Steam is a gas.
The same substance can exist in different states. For example, water can exist as ice, liquid water, and steam.
Matter and Materials
Matter is the general name for anything that has mass and occupies space.
Materials are different kinds of matter used for different purposes.
For example:
Wood is used to make furniture.
Glass is used to make windows and lenses.
Iron is used to make tools, machines, and buildings.
Plastic is used to make many daily-life objects.
Rubber is used to make tyres and elastic bands.
Different materials have different properties. Some are hard, some are soft, some are strong, some are flexible, and some can conduct heat or electricity.
The study of matter helps us understand why different materials are used for different purposes.
Examples of Matter
Examples of matter include:
- Books
- Water
- Air
- Stone
- Wood
- Iron
- Glass
- Plastic
- Milk
- Oxygen
- Carbon dioxide
- Our body
All these examples have mass and occupy space.
What is Not Matter?
Not everything around us is matter.
Light is not matter because it does not have mass and does not occupy space in the same way as objects do.
Sound is not matter. It is a form of energy that travels through a medium.
Heat is not matter. It is energy transferred due to temperature difference.
So, matter and energy are different ideas in Physics.
Matter has mass and occupies space. Energy can cause changes in matter.
Why Matter is Important
Matter is important because everything physical around us is made of matter.
The study of matter helps us understand:
- Solids, liquids, and gases
- Materials used in daily life
- Density and pressure
- Floating and sinking
- Expansion and contraction
- Changes of state
- Heat transfer
- Chemical and physical changes
Matter is the foundation for many topics in Physics, Chemistry, Engineering, and everyday science.
Glossary of Key Terms
Recap of the Key Terms in Matter
- Energy: The ability to do work or cause change. Energy is not matter.
- Gas: A state of matter with no fixed shape and no fixed volume.
- Liquid: A state of matter with fixed volume but no fixed shape.
- Mass: The amount of matter present in a body.
- Material: A kind of matter used for a particular purpose.
- Matter: Anything that has mass and occupies space.
- Particle: A tiny unit of matter.
- Solid: A state of matter with fixed shape and fixed volume.
- Space: The room or volume occupied by matter.
- Substance: A form of matter with specific properties.
- Volume: The amount of space occupied by an object or substance.
Questions and Answers
Recap the concepts you have learnt. Try to answer the questions. You can find the answer to any question by clicking on the icon.
What is matter?
Matter is anything that has mass and occupies space.
Give three examples of matter.
Water, air, and stone are examples of matter.
Why is air considered matter?
Air is considered matter because it has mass and occupies space.
What is mass?
Mass is the amount of matter present in a body.
What does it mean when we say matter occupies space?
It means matter takes up room or volume.
What are the three common states of matter?
The three common states of matter are solid, liquid, and gas.
How are particles arranged in solids?
In solids, particles are closely packed and usually vibrate about fixed positions.
How are particles arranged in gases?
In gases, particles are far apart and move freely in all directions.
What is the difference between matter and material?
Matter is anything that has mass and occupies space. A material is a particular kind of matter used for a purpose.
Is light matter?
No. Light is not matter. It is a form of energy.
Is sound matter?
No. Sound is not matter. It is energy that travels through a medium.
Why is the study of matter important?
The study of matter helps us understand solids, liquids, gases, materials, density, pressure, changes of state, and many everyday physical processes.