Lab Safety
Measurement and Conversions
Significant Figures and Scientific Notation
I am your density
Percent Error
100
What is the correct way to wear goggles and why are they important?
Wear them over your eyes, not your neck. They keep any dangerous chemicals out of your eyes.
100
This saying helps us remember how to convert metric units.
What is King henry doesn't usually drink chocolate milk
100
How many significant figures does 0.00956 have?
3
100
This is the density of an object with a mass of 10 g and a volume of 10 mL.
What is 1 g/mL?
100
What is precision?
Hitting the same place over and over again.
200
What do you do if you get a little bit of chemical on your hand?
Wash your hands really good.
200
Convert 10 cm to mm.
100 mm
200
How many significant figures does 19,000,001 have?
8
200
This is the mass of and object with density of 7 g/ml and a volume of 10 ml?
What is 70 g?
200
What is accuracy?
Actually hitting the target or hypothesis.
300
What would you do if you got a bunch of chemicals all over your body?
Use the shower.
300
Convert 250. kJ to J
250,000
2.50 x 105
300
Put 21,000,000 into scientific notation.
2.1 times 107
300
This is the volume of an object with density of 10 g/ml and a mass of 10 g.
1 ml
300
If I know and object's density is 11 and I measure it to be 13, what is my percent error?
18%
400
If an actual person is on fire, what would you use?
A fire blanket.
400
Convert 234 Pa to mPa
234,000
400
What is 4.567 + 2.3 with proper significant figures?
6.9
400
If an object has a density of 4.5 g/mL and you double its mass, what is the density of the new sample?
4.5 g/mL
400
If I draw a line that should be 5 cm and the line I draw is 6.7 cm, what is my percent error and would that be considered accurate?
34% - NO!
500
What are 8 lab mistakes in this picture? You have one minute.
Not wearing goggles
Horseplay
Eating/Drinking
Straight up drinking poison
Clogged sink
Electrical cord in the sink
Spilled soda
Cheese puffs on the floor
Hair on fire - no hair tie
Not paying attention while heating test tube
A snake
Broken Glass
Distracting parnter while doing something important
500
Convert 45 L to pL.
45,000,000,000,000 pL
4.5 x 1013 pL
500
What is 4.01 x 5 using significant figures?
20
500
This element can have a mass of 234 g and a volume of 100 ml.
What is boron?
500
If you find the density of barium to be 3.75 g/ml in a lab, this is your percent error to the correct number of significant digits.
3.59