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science
science flash cards
| Term | Definition |
|---|---|
| Matter | anything that has mass and takes up space |
| chemistry | the study of properties of matter and how it changes |
| physical properties | color texture length etc |
| chemical properties | flammable rot rust reacts |
| element | a substance made of only one type of atom |
| atom | all matter is made of |
| compound | 2 or more elements chemically combined |
| molecule | a neutral group of two or more atoms |
| chemical formula | symbols used to show elements |
| weight | the amount of gravity acting on an object |
| mass | how much matter in an object |
| volume | how much space an object takes up |
| density | how much is packed in an object. mass divided by volume |
| physical change | changes form of appearance |
| chemical change | changes into a different substance |
| law of conservation of mass | states that matter is not created or destroyed during a physical or chemical change |
| thermal energy | total of kinetic and potential energy of all the particles in an object |
| exothermal change | change in which energy is realized |
| endothermic change | a change in which energy is absorbed |
| heterogenous mixture | mixture where you can see all the different parts |
| homogenous mixture | mixture where you can't see all the different parts |
| what is the difference between mass and weight | mass=stuff inside an object weight=the amount of gravitational force acting on an object |
| what is matter made of | atoms |
| how can you find density | mass/volume |
| what are the two types of mixtures | heterogenous and homogeneous |
| how can we describe matter | using physical properties and chemical properties |
| what happens to a substance in a physical and chemical change | physical- changes form chemical- changes substance |