Matter is a term used to describe anything that has mass and takes up space. It can exist in different forms such as solid, liquid, and gas. Matter is made up of tiny particles known as atoms, which are the building blocks of matter.

The NCERT Solutions - Matter In Our Surroundings explains matter in detail. Here are some key points:

Properties of Matter
- Matter can be classified based on its physical properties such as color, shape, size, and texture.
- Matter can also be classified based on its chemical properties such as reactivity, flammability, and toxicity.

States of Matter
- Matter can exist in three states - solid, liquid, and gas.
- The state of matter depends on the amount of energy present in the particles that make up matter.
- Solids have a fixed shape and volume, liquids have a fixed volume but take the shape of the container, and gases have neither a fixed shape nor volume.

Change in State of Matter
- Matter can change its state from one form to another by adding or removing energy.
- Melting, freezing, boiling, and condensation are some common examples of change in state of matter.

Measurement of Matter
- Matter can be measured using different units such as grams, kilograms, and liters.
- The SI system of units is widely used to measure matter.

Conclusion
In summary, matter is anything that has mass and takes up space. It can exist in different forms and can be classified based on its properties. The NCERT Solutions - Matter In Our Surroundings provides a comprehensive understanding of matter and its various aspects.

Anything which occupies space and has mass and volume is called matter..