Book, paper, cheese.
A cylinder
http://www.periodictable.com/Elements/Solid/index.html shows all solids at room temperature
A circle
oxygen,nitrogen,and H2O
No. Platonic solids, as their name suggests, are 3-dimensional objects. A triangle is 2-dimensional.
3 liquids- oil, water, and cleaning stuff can float on top of each other 3 solids- foil, paper, rocks
solid shapes are 3-D
You decide what shape to use, and look up the formula in a list of formulae.
cone
aluminum and rock juice and milk oxygen and nitrogen
The 3 compositions of matter are liquids,gasses and solids.
Sure! Here are ten examples of solids: iron, gold, salt, diamond, ice, wood, quartz, graphite, plastic, and concrete. Each of these materials has a definite shape and volume, distinguishing them from liquids and gases.