Drawing and Interpreting Graphs Using Open Office

On November 9, 2010 we started reviewing for the big chapter test coming up on Monday November 15.
We were given a review sheet by  Mrs. Chen which covered accuracy and precision, absolute and relative uncertainty, adding, subtracting, multiplying and dividing using significant figures, rounding, scientific notation and unit conversions.

Later we headed down to the computer lab to do some more graph work using Open Office.


First we graphed the volume( mL) of a sample of gas under increasing temperature(K)

We were asked to use a trend line for our scatter plot

We discovered that the slope of our graph was f(x) =0.55x -0.31.

The point (521, 273) was uncertain on this graph, meaning that when temperature was 521 K, and the volume 273 mL, the point was not directly on the trend line like the other points.

In number 2, we graphed the density(g/mL)  of a water sample under increasing temperature(degrees Celsius)

We determined that the density of water increased from 0.99987 g/mL to 1.00000 g/mL when heated from 1 degree to 4 degrees Celsius.
After that though, the temperature continued to increase but the density decreased.

The graph did not illustrate a consistent unitary rate because it was a parabola and was not constant. Density increases then decreases while the temperature consistently rises.

We then graphed the relationship between volume and the mass of several pieces of glass.

We graphed it, and used a trend line. By determining its slope, we determined the density of the glass.