REVIEW UNIT 1

Scientific Method –

     Purpose – the reason we’re doing the experiment

     Hypothesis – a guess or prediction about what might happen

     Experiment – procedure

                           sketch, equipment

                           data, observations,

     Conclusion – Answer the purpose.

Metric System conversions

Measurement

     - equipment

     - reading a scale

Scientific Notation

Significant Figures/Uncertainty

     calculations done to the correct sig.figs

Chapter 3 Worksheet

Answers

1.  5.893 x 10^-7              m

     2.99793 x 10 ⁸         m/s

     7.1 x 10⁸                  years

     1.660531 x 10^-24      g

     6.023 x 10 ²³

     3.41 x 10 ³⁰              ˚C

2.  0.000 000 000 000 000 000 000 000 000 000 9109 kg

     15 000 000               ˚C

     -273   ˚C

     1 900 000 000 000 000 000 km

     0.000 000 000 053 m

     0 000 000 000 000 000 000 16 couloumb

3.  2.37 x 10³    or  2.370 x 10³

     3 x 10 ^-2

     2.74 x 10 ^-13

     9.85 x 10 ²⁰

     1.5045 x 10 ¹
     6.003 x 10 3

     4.5 x 10 ^-5

     7.07 x 10 ^-9

4.  0.005 63

     670 000

     1010

     0.000 000 09899

     2 000 000

     0.0785

     34 440 000 000

     0.000 200 02

5   10 ⁹                               10 ^-6

     10 ³                               10 ⁹

     10 ⁴                               10 ⁷

6         1.4 x 10 ¹²

           6.5 x 10 ¹

           2.2 x 10 ^-13

     2.56 x 10 ²

     4.0 x 10 ¹³

     3.3 x 10

     3.0 x 10 ^-6

     2 x 10 ^-5

     3.3 x 10 ³

     1.1 x 10 ⁶

     7.7 x 10 ⁵

     3.6 x 10 ^-3

     4.15 x 10 ³

     9.0 x 10 ^-5

     -6 x 10 ³

     5.8 x 10 ⁸

     1.8 x 10 ^-3

     3.4 x 10 ⁴

     9.5 x 10 ³

     - 2.9 x 10 ⁵

B. Ruler A .   3.7 or 3.8   cm

     Ruler B.   3.75 – 3.78 cm