This presentation about States of Matter grade 7

1. States of
Matter
Understanding the basics of physical states

2. Introduction
Matter comes in different states based on how its particles are
arranged. These states give matter unique properties that you
see and experience every day. This presentation will introduce
you to the characteristics of solids and liquids, showing how
particles behave and why these states matter in our world.

3. States of Matter

4. Solid State Characteristics
In solids, particles are tightly packed in a neat, fixed
pattern. They don’t move around much—just vibrate in
place. Heating solids makes particles vibrate faster because
they gain energy. This is why solids keep their shape and
volume, feeling firm and rigid under normal conditions.

5. Liquid State Characteristics
Liquid particles are close but randomly arranged, giving
liquids the ability to flow. They can move around freely and
bump into each other. When heated, liquid particles speed
up, causing more collisions. Liquids have a fixed volume but
take the shape of whatever vessel holds them, making them
flexible yet consistent.

6. Gas State Characteristics
Gas particles are spread out and move freely at high speeds in
all directions. They have very little attraction between them,
which lets gases expand to fill any container. When heated, gas
particles gain more energy, speeding up their movement and
collisions, which makes gases highly compressible and easy to
diffuse.

7. Changes and Properties of Matter

8. Diffusion and Influencing Factors
Diffusion is when particles move from where they are crowded
to where there’s space. It happens in solids, liquids, and gases
because of the spaces between particles. The rate of diffusion
depends on temperature, particle size, and the interaction
area, speeding up with higher temperature and smaller
particles.

9. Changes of State with Temperature
Matter changes state by gaining or losing heat. Heating can
turn solids to liquids, and liquids to gases, while cooling does
the reverse. These phase changes happen because particles
absorb or release energy, shifting how tightly they stick
together without changing what the matter is made of.

10. Density and Its Effects on
Floating or Sinking
Density tells us how much stuff fits in a certain space.
Things less dense than a liquid float, while denser things
sink. This is why some objects float on water and others
don’t. Changes in temperature can also affect density and
whether an object floats or sinks.

11. Conclusions
Getting to know the states of matter helps us understand the
world around us. From solids to gases, how particles move
and interact explains everything from your morning ice to
steam from a cup of tea. Knowing about diffusion, changes of
state, and density makes science a bit more fun and practical!

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