1. Measurement
- 0.185m
- 0.240m
- 0.300m
2. Metric Prefixes
- mega: M, meaning: E9
- nano: n, meaning: E-9
- pico: p, meaning: E-12
- milli: m, meaning: E-3
- centi: c, meaning: E-2
3. Conversions
- 5.467E-5hm
- 3.77E8mg
- 7.45E6cL
- 1.253763E-9km
4. Sci. Notation
- 6.82410230E-1
- 1.26537872E7
- 3.32E3
- 3.4E-6
5. Math with Sci. Notation
- 6.06E23
- 2.53E1
6. Counting Significant Digits
- 8.3007 g–> 5SF
- 9.0000 mL –> 5SF
- 0.0000001s –> 1SF
- 572 pencils –> 3
7. Math with Significant Digits
- 100 (ones place)
- 8.0E2 (2SF)
8. observation (5 senses) –> problem statement (form of question) –> write hypothesis (if, then, b/c) –> design experiment (IV, DV, constants, control) –> Perform experiment/Collect Data –> Analyze data (graphs) –> Draw conclusions (refer back to hypothesis, use data to support/reject, analyze reliability and validity of data)
9.
- no, yes
- yes, yes
- no, no
9.
- Group 1- accurate (b/c….compare actual values to standard)
- Group 2- precise (b/c…compare actual values to each other…find biggest difference)
10.
- Given: 6.28 moles
- Find: atoms
- Conversion Factor: 1mol/6.022E23atoms
- Answer: 3.78E24atoms