Lab Safety
Measuring + Math
Vocabulary
Sig Figs
Scientific Notation
100
When should you eat or drink in lab?
Never
100
What's the tool we use to most precisely measure volume?
Graduated cylinder
100
Define flammability
How easy it is for something to catch fire
100
How many sig figs in this number: 0.001090
4
100
What's my BASE number for scientific notation
10
200
What's the fume hood used for?
Removing toxic vapors
200
What's the volume?
25.8 mL
200
What's the formula for density?
Density = Mass / Volume
200
In addition and subtraction, do I focus on sig figs or place value?
Place value
200
If I have a negative exponent, do I move the decimal left or right?
Left
300
What do you need to have on when working with glassware?
Goggles
Bonus point: closed toed shoes
300
What's my percent yield if:
Known: 8.53
I got: 7.4
87%
300
Define inert
Not reactive
300
In multiplication and division, do I focus on sig figs or place value?
Sig figs
300
Which number is bigger and WHY
1.87 x 10-4 or 1.2 x 10-2
1.2 x 10-2
Bigger the exponent, bigger the number (-2 > -4)
400
What should I use if somebody's shirt catches on fire?
Fire blanket
400
What's my percent error if:
accepted = 9.81
I got = 9.97
1.63%
400
What's the difference between Accurate and Precise
Accurate = close to the goal / known
Precise = consistent / values close together
400
What's my answer:
12.01 / 2.3
5.2
400
What's this number in standard form?
4.502 x 105
450200
500
What are 3 things I should do if we have to evacuate lab?
Turn off burners/flames
Close containers
Turn off gas
500
Calculate the student's grade if they have:
19/20 - formative 23/25 - formative
14/16 - summative 8/10 - summative
Approx. 85.5%
500
What's the difference between: Independent Variable and Dependent Variable
Independent = what you change; x axis
Dependent = responds; y axis
500
What's my answer:
12.01+16.999+13.03+20
60
500
Write this number in scientific notation:
0.0004060700
4.0607 x 10-4