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Matter/Atoms
Question | Answer |
---|---|
Matter | anything that has mass and takes up space |
Solid | has definite volume and definite shape |
liquid | has definite volume but no definite shape |
gas | no definite volume and no definite shape |
physical properties | characteristics that don't change the matter, properties that use the 5 senses, example- shiny |
chemical properties | characteristics that change the identity of the matter example if something can burn |
physical change | a change that doesn't change the identity of the matter example: slicing an apple |
chemical change | a change that does change the identity of the matter example burning wood or digesting food |
mixture | combination of 2 or more substances, the substances still have the same identity and can be separated example - Chex mix |
solution | a special type of mixture, one substance dissolves into another example- ocean water or air |
solute | substance being dissolved |
solvent | substance that dissolves the other substance |
How can we separate mixtures? | chromatography, filter, sieve, magnet or evaporation |
atom | smallest part of an element, building blocks of matter |
element | made of only one type of atom example- oxygen |
proton | positively charged particle in the nucleus of an atom |
neutron | a particle in the nucleus of an atom, has no charge, is neutral |
electron | a negatively charged particle, found outside the nucleus |
atomic number | the number of protons |
atomic mass | the number of protons plus the number of neutrons |
freezing | a liquid changes to a solid |
melting | a solid changes to a liquid |
evaporation | a liquid changes to a gas |
condensation | a gas changes to liquid |
compound | made of 2 or more different elements chemically bonded together |
molecule | made of 2 or more atoms joined together without changing the properties |