Notes: Ch 1 Sect 4 Math and Science. p30-33
Estimation-An approximation of a number based on known information.
Scientists sometimes rely on estimations when they can’t obtain exact numbers.
Accuracy-How close a measurement is to the actual value.
Reproducibility or Precision-How close a group of measurements are to each other
How can you influence accuracy and reproducibility on a dartboard?
Significant figures-significant figures represent precision in measurements and calculations. A triple beam balance has a maximum of 4 significant figures (sig. figs.)
5.4 has 2 sig. figs.
10000 has 1 sig. fig
10000. has 5 sig. figs.
.001 has 1 sig. fig.
.101 has 1 sig. fig.
543.010 has 6 sig. figs.
0 is often a place holder. If you can write the number without the 0 it is significant. If not, it is a placeholder. Be careful. Watch decimal points. We will calculate with significant figures later.