Interesting facts about liquids
- Around 70% of the Earth’s surface is covered in liquid.
- When water flows along a river, it is constantly changing its shape to fit the space available.
- The human body is made up of 60-80% of liquid.
- If a liquid is poured out of a container it will form a puddle.
- Flowing liquid like waterfalls can be very powerful. The energy it creates can be used to create electricity or turn wheels of machinery.
- Liquid petrol is used in cars. It turns into a gas and is expelled through the exhaust pipes.
- Fluids are a phase of matter and include liquids and gases. All fluids flow at different speeds. Some liquids like pancake batter are thick and flow slowly. Other liquids like tar have such high viscosity (thickness) that they seem solid!
Characteristics of a liquid
A liquid is a form of matter that is kind of in between a solid and gas. It can flow around freely, much more than a solid but not as much as a gas. Liquids can adapt to their containers but are hard to compress (squash).
Examples of liquids
Common examples of liquids are water, oil and blood. Water is made up of two elements, hydrogen and oxygen. Its chemical formula is H2O.
The three phases of matter: solid, liquid and gas
Everything we touch, see, smell and taste is held within a form called matter. Each form is made up of millions of pieces of atoms and molecules that work together. There are three main types of matter: solids, liquids and gases.
Solids - The particles in a solid are held together really closely, this stops them from moving. This is what makes solids so hard and stops them from flowing.
Liquids - The particles in a liquid are also held together closely but not as much as solids. They have more space between them and this is why they can flow.
Gases - The particles in a gas are very far apart so they are always dancing around and filling as much space as they can.