Mass Volume Density

Mass is the about of matter in a subtance. Volume is the about of space occupied by an object. Density is the direct relationship between the both. Mass is measures with a three beam balance and the unit is grams (g). Volume is measured by water displacement and the unit is liter (L) or length x width x height. In your data you measure accuracy and precision. Accuracy is when something it's done correct and precision show how close measurements are close to one another . Significant figures are all the digits known plus an estimated digit. To count a significant figure you must know that none zero numbers are always significant, zeros in the middle of a number are significant, zeros at the end and to right of the decimal are significant, and place holder zeros are not significant. When determining significant figures in a measurement with adding and subtracting; the final measurement must have the same amount of digits as the number with the least amount of digits. When multiplying and dividing the final measurement must have the same total of significant figures as the measurment with the least numbers. There could be a physical and chemical change in matter. The physical change is changing the appearance with out changing its composition. A chemical change means one or more substances are changing into a new substance. If the density if a object is higher than that of water it woll sink and if it is lower it would float.