Unit 1 Study Guide

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.

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

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

Identify and tell use for common lab equipment

• Balance• Used to determine the mass of an object

Identify and tell use for common lab equipment

• Erlenmeyer Flask• Used for heating liquids

Identify and tell use for common lab equipment

• Beaker• Measuring large amounts of liquids (not

accurate)

Identify and tell use for common lab equipment

• Graduated cylinder• Measuring volume

Identify and tell use for common lab equipment

• Test tube• Mixing small amounts of liquid substances

Know how to read the following instruments (Remember units)

• 45.5 g

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

• 16.8 mL

• 28.1 degrees C

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-

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

Complete the following metric conversions

• 25mm = ___________cm• 45.32L = ___________mL• 27.32mm = __________m• .025kg = ___________g• 15g = ____________ hg

2.5

45,320

.02732

25

.15

Identify the correct number of significant figures for each value.

• 794 _____• 86050 _____• 60010. _____• 703.010 _____• 9.010 x 10-2 _____

3

4

5

6

4

Calculate the answers using appropriate number of significant figures.

• 0.0677 48.1 +82.7655

• 130.9

Calculate the answers using appropriate number of significant figures.

• b. 43.8316• - 29.5706• 14.2610

Calculate the answers using appropriate number of significant figures.

• 0.0222 x 0.7000 x 8.702 = • 0.135

Calculate the answers using appropriate number of significant figures.

• 2222/2 =• 1000

Convert the following numbers to scientific notation.

• 4,500 _____________________• 0.00073 _________________________• 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

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

0.00176

0.0000001901

9,110

54.0

What is the formula for density? Include the triangle

• D = m/v

D

m

v

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?

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

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