| A | B |
|---|
| powders | substances made of finely ground solid particles |
| crystals | a solid form of a substance that has a definite pattern that is repeated regularly in 3 dimensions |
| properties | qualities of substances such as size, color, odor, texture, shape, and weight |
| substance | a material of a certain kind |
| wafting | the safe technique used to smell a substance. One hand gently moves air from over the substance, toward the nose |
| transparent | allowing light to pass through so that objects on the other side can be seen clearly |
| translucent | allowing some light to pass through so that objects on the other side are blurry |
| opaque | does not allow light to pass through so that objects on the other side cannot be seen |
| solution | a clear liquid system that can be colored or colorless and that is a mixture of 2 substances |
| suspension | a milky or cloudy liquid system |
| variable | part of an experiment that changes |
| reaction | occurs when substances interact to form new substances; evidence of a reaction includes change in color or temperature, or bubbles forming |
| starch | white, tasteless, ordorless food substance found in potatoes, rice, etc. It will turn blue-black when it reacts with iodine |
| pH scale | scale used to show strength or weakness of an acid or base; 0.0 = very acidic, 7.0 = neutral, 14.0 = very basic |
| acid | reacts with a base to form a salt |
| base | reacts with an acid to form a salt |
| interaction | when an object affects another object and a change occurs |
