1. Unit 1 Study Guide

2. Write safety rules when considering the following:
Eating in lab: Do not eat or drink in lab
Clothing considerations: do not wear loose or baggy clothes. No open toed shoes
Eye protection: Always wear goggles when doing lab
Broken glassware: Tell teacher clean and dispose of properly
Glassware heating precautions: Don’t point heated liquids at students
Chemical disposal: Don’t pour down drain unless told to
Tasting chemicals: Do not taste anything unless instructed to
Smelling chemicals: Don’t directly smell, Waft
Electrical safety: don’t use if frayed wires. Water and electricity don’t mix
Cleaning stations: Clean up before and after each lab
Bunsen Burner precautions: don’t lean over burner. Always light match before turning on gas.

3. Place in correct order according to the scientific method.
___Experiment
___Collect Data
___Define problem
___Draw conclusions
___Form hypothesis
___Gather information
___Analyze and organize data 4 5 1 7 3 2 6

4. Define the following Scientific law – natural event or phenomenon
Theory – hypothesis that has been proven over and over
Hypothesis – an educated guess based on gathered information
Inference – prediction based on previous occurrences
Observation – using your sense to collect data
Independent variable – variable that the scientist manipulates
Dependent variable – variable that is measured
Control – group that does not receive the independent variable(used for comparison)
Data – observation or measurements from an experiment

5. Identify and tell use for common lab equipment
Balance
Used to determine the mass of an object

6. Identify and tell use for common lab equipment
Erlenmeyer Flask
Used for heating liquids

7. Identify and tell use for common lab equipment
Beaker
Measuring large amounts of liquids (not accurate)

8. Identify and tell use for common lab equipment
Graduated cylinder
Measuring volume

9. Identify and tell use for common lab equipment
Test tube
Mixing small amounts of liquid substances

10. Know how to read the following instruments (Remember units)

11. A – 0.5 cm
B – 3.3 cm
C – 5.5 cm
D – 7.0 cm
E – 8.3 cm

12. 16.8 mL

13. 28.1 degrees C

14. Write down the pneumonic device that helps you remember metric conversions. Include the prefix names as well.
King hector died by drinking chocolate milk.
Kilo-, hecto-, deka-, base unit, deci-, centi-, milli-

15. What are the SI base units for length, mass, volume, time, and temperature?
Length – meter
Mass – gram or kilogram
Volume – Liters
Time – seconds
Temperature - Kelvin

16. Complete the following metric conversions
25mm = ___________cm
45.32L = ___________mL
27.32mm = __________m
.025kg = ___________g
15g = ____________ hg
2.5
45,320
.02732 25
.15

17. Identify the correct number of significant figures for each value.
794 _____
86050 _____
_____
_____
9.010 x 10-2 _____ 3 4 5 6 4

18. Calculate the answers using appropriate number of significant figures.
130.9

19. Calculate the answers using appropriate number of significant figures.

20. Calculate the answers using appropriate number of significant figures.
x x =
0.135

21. Calculate the answers using appropriate number of significant figures.
2222/2 =
1000

22. Convert the following numbers to scientific notation.
4,500 _____________________
_________________________
340,600 ________________________
8,034,000 __________________________
0.010 _________________________
4.5 x 10 3
7.3 x 10 -4
3.406 x 10 5
8.034 x 10 6
1.0 x 10 -2

23. Convert the following numbers to standard notation
2.3 x 104 _____________________________
1.76 x 10-3 ____________________________
1.901 x 10-7 ___________________________
9.11 x 103 _____________________________
5.40 x 101 ___________________________
23,000
9,110
54.0

24. What is the formula for density? Include the triangle
D = m/v m D v

25. Complete the following density problems: (Show work!!!)
If you have a density of 3 g/mL and a mass of 15g, what is the volume?

26. If you have a volume of 10mL and a mass of 100g, what is the density?

27. If you have a volume of 55mL and a density of 2g/mL, what is the mass?