States of Matter
⭐ MasteredMatter is mostly solid, liquid or gas. Heating or cooling can change one state into another, like ice melting to water.
Plasma is a fourth state of matter, found in lightning and the Sun.
All about States of Matter
Matter is anything that has mass and takes up space. The three most common states are solid, liquid and gas. In a solid the particles are packed tightly and stay in place, so a solid keeps its shape. In a liquid the particles move around, so it takes the shape of its container.
In a gas the particles are far apart and move quickly, so a gas spreads out to fill any space. Heating a substance gives its particles more energy, which can change its state. Cooling takes energy away, which can change it back.
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Real-life uses of States of Matter
- Freezing water to make ice cubes
- Using gases like air in tyres and balloons
- Making chocolate melt in a warm hand and set again in the fridge
Frequently asked questions about States of Matter
What is the difference between melting and evaporating?
Melting is when a solid turns into a liquid. Evaporating is when a liquid turns into a gas, usually at its surface.
Why does ice float on water?
Ice is less dense than liquid water because its particles are arranged with more space between them.
Is plasma a state of matter?
Yes. Plasma is a hot, electrically charged gas found in lightning, neon signs and the Sun.