Question | Answer |
building blocks of matter | elements |
examples of properties of matter | hardness, shape,texture,temp.,flammability, and color |
examples of compounds | carbon dioxide(CO2) and hydrogen peroxide(H2O2) |
example of mixtures | soil |
example of physical change | chopping wood,bending copper wire into shapes, and changes in state |
example of chemical change | rusting iron, burning of gas in a car engine, and vineger and bakeing soda |
about mass | if you took and object to the moon it's mass would remain the same |
about volume | V=B*H*W: cm3 is a common unit of volume |
about density | D=M/V: g/cm3 is a common unit of density |
waters density | 1.0 g/cm3 |
Dalton's Ideas | atoms cannot be broken down into smaller pieces, atoms of different elements are different, atoms of each element have a unique mass, and the masses of the elements in a compound are always in a constant ratio |
atoms and molecules | two atoms bonded together make one molecule |
gold's density | usually found in nature as an element and can be seprated from other materials because of its density |
removing compounds | chemical reaction is needed to remove an element from its compound |
suspensions and solutions | unlike suspensions solutions are the same throughout |
example of solvent and solute | solution of table salt and water: solvent is water and the solute is salt |