Today I learnt about matter. Matter is everywhere. everything that takes up space and has a mass is matter. Mass is different to weight, weight is how much something weighs and mass is the how much or how big or small or the space that something takes up. Your weight on the moon is 16.5 of your weight on the earth. All matter is made up of elements, which have specific chemicals. There are 5 states of matter, the main states of matter on earth are solids, liquids and gas. The most popular state of matter in the universe is plasma. and the last state of matter was invented/found in 1995 it’s man-made, Bose-Einstein condensates is made up of a metal called rubidium, it’s a group of atoms cooled to nearly absolute zero or -300 degrees, when they reach that temperature the atoms are hardly moving and clump together and enter the same energy state. using temperature or pressure you can move matter from one state of matter to the next. Solids have mass, a definite volume, a definite shape and the atoms are tightly packed so it can keep it’s shape. Liquid has mass, a definite volume but no definite shape it adapts to its container because the atoms are more spread out. Gas has mass, no definite volume, no definite shape but like liquid will take up the shape of it’s container because the atoms are even further apart. Plasma isn’t on earth and it’s one whole atom.
Here is a representation of the atoms in solids, liquids and gas.
Lesson 2-Physical and chemical change
Physical change is when something might look or feel different but nothing new has been created. Chemical change is when something new has been created or something might change, colour, smell, fizzing or bubbling or it might be producing light or heat, for instance when you tear or scrunch a piece of paper it is reversible so it’s a physical change, but when you burn paper you cannot reverse it and it has created something new, ash.