Kelly


 * __STATES OF MATTER__ **

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Solids are hard, because all their molecules are bunched together.The closer molecules are, the harder the object is.Solids can hold their shape. Bonds between solid particles are hard to break. It is harder to compress a solid, rather than a liquid or a gas, becuase a solid's particles are closer together.  __LIQUIDS__ Bonds between liquid particles are easily broken because they don't hold their own shape. Liquid particles hold the shape of their container. Liquids are also known as in between states of matter. Because they can be found in between the solid and gas states. Liquids are also very difficult to compress. When you compress a substance, it means you are forcing a certain amount of it into a smaller amount of space. Substances are compressed, when pressure goes up. Liquids are difficult to compress, becuase their atoms are already close together.
 * __SOLIDS__

__GASES__ Gases can be found all around us. This gas is called atmosphere. It is a large layer of gas that surrounds the Earth. Gas particles are spread out, further away from eachother, and they are constantly bouncing around. This is because their atoms and molecules are full of energy. With very little pressure, gas particles can easily be compressed. Gases can also hold the shape of a container.

__QUESTIONS:__

What is Sublimation? Sublimation is when a solid, changes directly to the gaseous state, withough becoming a liquid.  Supposing you increased the pressure of the air above boiling liquid. What would happen to the boiling point of the water? The temperature of the boiling water would rise. Increasing the pressure, would also make the container the glass is in to fog up.

Imagine that you are trying to boil water for a cup of tea up a mountain. Why would the cup of tea be fairly horrible? Because when you are up a mountain, it is very cold. So the water would not boil, it would just be warm.

- Everything is made from atoms - Elements are substances that cannot be separated into simpler substances. Compounds are Substances that are made from a number of elements - The periodic table was first invented by a man named Dimitri Mandeleev (1834-1915) - The periodic table is organised by either metals, nonmetals, or metalloids. It is also organised by the atomic number which is the number of protons and electrons there is in an atom ** - **First 20 elements on the periodic table: Hydrogen H, Helium He, Lithium Li, Beryllium Be, Boron B, Carbon C, Nitrogen N, Oxygen O, Fluorine F, Neon Ne, Sodium Na, Magnesium Mg, Aluminium Al, Silicon Si, Phosphorus P, Sulphur S, Chlorine Cl, Argon Ar, Potassium K, Calcium Ca **

**Foams are dispersions of GASES in LIQUIDS or SOLIDS. Whipped cream, and shaving cream are good examples of LIQUID foam. Yeast breads are good examples of SOLID foam. The most general definition of foam is a substance that is formed by trapping many gas bubbles in a liquid or solid.** WHIPPED CREAM: SHAVING CREAM:FIRE EXTINGUISHER FOAM:
 * __COLLOIDS : FOAM COLLOIDS__**
 * __EXAMPLES:__**

