science study guide
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Created by:
purplicious7 on January 11, 2012
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40 terms
Terms | Definitions |
|---|---|
 what is the study of the natural world | science |
| scientists use the skills of these three things to learn more about the natural world | observing, inferring and predicting |
| what is the study of properties of matter & how it changes | chemistry |
| what is the study of matter, energy, motion, and forces | physics |
| what refers to different ways scientists study the natural world | scientific inquiry |
| what do scientists use and develop to increase people's understanding of the world | models, theories and laws |
| what is a well tested explanation for a wide range of observations and experimental results | scientific theory |
| what is the statement that desciribes what a scientist expects to happan every time under a particular set of conditions | scientific law |
| what is the basic unit of length in the metric system | meter |
| what must scientists sometimes rely on when they cannot obtain exact numbers | estimates |
| what is anything that has mass and takes up space | matter |
| what 2 properties does every form of matter have | physical and chemical change |
| what is the basic particle of which all elements are made | atom |
| atoms combine to form larger particles called what | molecules |
| what is a single kind of matter that is pure, meaning it will always have a specific kind of make up or composition and a specific set of properties | substance |
| what is a pure substance that cannot be broken down to any other substances by chemical or physical means | element |
| what is made up of 2 or more substances | mixture |
| what is the ability to do work or cause change | energy |
| what are the 4 kinds of energy related in matter | thermal, electrical, electromagnetical, chemical |
| what is the change in which energy is taken in | endothermic |
| what is the change that releases energy | exothermic |
| what has a definite shape and definite volume | solid |
| particles in a solid are closely locked in position and can only do what | vibrate |
| solids are made up of crystals which are called what | crystalline solids |
| what kinds of solids are arranged in and irregular pattern | amorphous |
| what has a definite volume but no shape of its own | liquid |
| what is a substance that flows | fluid |
| the particles in a liquid are more _________ connected and collide and move past one another | loosely |
| what can change volume very easily | gas |
| what has no shape nor definite volume | gas |
| in ______ the atoms and molecules are free to move independently, colliding frequently | gasses |
| the change from liquid to gas is called what | vaporization |
| the change of liquid to solid is called what | freezing |
| what is the reverse of freezing | melting |
| what is the smallest particle of an element | atoms |
| negatively charged particles are known as | electrons |
| what is the central core of an atom | nucleus |
| what is a positively charged particle that is part of an atom's nucleus | proton |
| a periodic table is an arrangement of elements showing their repeating patterns of their what | properties |
| the periodic table is organized in horizontal rows called what | periods |
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