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Science Vocab. Ch. 2
science vocabulary words. chapter 2. 34 words.
| Question | Answer |
|---|---|
| matter | anything that has mass and takes up space |
| chemistry | study of matter and how matter changes |
| substance | single kind of matter that is pure; always has a specific makeup |
| physical property | characteristic of a pure substance that can be observed without changing it to another substance |
| chemical property | characteristic of a pure substance that describes its ability to change into different substances |
| element | a pure substance that cannot be broken down into any other simpler substance by chemical of physical means |
| atom | basic particle from which all elements are made |
| chemical bond | force of attraction between two atoms |
| molecule | formed when atoms combine to make larger particles |
| compound | pure substance made of two or more elements chemically combined in a set ratio |
| chemical formula | shows the elements in the compounds and the ratio of atoms |
| mixture | made of two or more substances that are together in the same place but are not chemically combined |
| heterogeneous mixture | a mixture in what you can see the different parts |
| homogeneous mixture | so evenly mixes that you can't see the different parts |
| solution | made up of a solute and a solvent |
| weight | measure of the force of gravity on an object |
| mass | measurement of the amount of matter in an object |
| International system of units | universal system of metric units |
| volume | amount of space that matter occupies |
| density | relates to the amount of mass of a material in a given volume |
| physical change | any change that alters the form or appearance of matter but does not create a new substance |
| chemical change | a change in matter that produces one or more new substances |
| law of conservation of mass | the fact that matter is neither created nor destroyed in any chemical or physical change |
| energy | ability to do work or cause change |
| temperature | measure of the average energy of random motion of particles of matter |
| thermal energy | total energy of all the particles in an object |
| endothermic energy | a change in which energy is taken in |
| exothermic energy | reaction that releases energy |
| kinetic energy | energy of matter in motion |
| potential energy | stored energy an object has because of its position |
| chemical energy | internal energy stored in the chemical bonds between atoms |
| electromagnetic energy | a form of energy that travels through space as waves |
| electrical energy | the energy of electrically charged particles moving from one place to another |
| electrode | two metal strips attached to wires that are placed inside a solution as part of the electrolysis process |
Created by:
sydneyybaileyy
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