Lab Safety
Metric
Scientific Notation
Metric Conversions
Precision, Accuracy, and Significant Figures
100
True or False: you may ingest chemicals in the lab.
False
100
What is the basic unit of mass in the metric system
GRAMS!
100
What is 456 mL in scientific notation?
4.56 x 102 mL
100
2.6 g = ___ kg
.0026 kg
100
The mass of a soccer ball is 0.43 kg. 3 different student measure the mass to be 0.42 kg, 0.40 kg, and 0.45 kg. Who is the most accurate?
0.42 kg
200
When working with chemicals or fire: Name 3 ways someone should prepare themselves for lab work
Tie back hair, roll up sleeves, remove any jewelry, wear lab goggles, etc.
200
What number are all metric units based on?
Powers of 10!
200
What is 750,000,000 m in scientific notation
7.5 x 108 m
200
300 m = __ cm
30,000 cm
200
Which of the following measurements is the most precise?
1 kg, 1.2 kg, 1.23 kg, 1.234 kg
1.234 kg
300
How do you detect the scent of a chemical?
Wafting! wave the scent towards you rather then sniffing it directly
300
What unit is used to measure volume?
Liters
300
Write 0.000923 grams in scientific notation.
9.23 x 10-4 grams
300
2.436 l = __ cl
243.6 cl
300
True or False: precision is how close you are to the true value of a measurement
False
400
What is the first thing you do if you spill a chemical on yourself?
Wash it off immediately with water!
400
Why might a scientist use scientific notation?
To make working with very large/very small number easier.
400
Convert 9.6 × 105 cm to standard notation
960,000 cm
400
.04 kg = __ mg
40,000 mg
400
Is the following precise, accurate, both, or neither?
Precise but not accurate
500
What should you do if you break glassware in the lab?
Immediately tell your teacher and dispose in the broken glass bin,
500
What is the system of scientific units called? Why do we use them?
SI Units
500
Convert 6.82 × 10-4 liters to standard notation.
.000682 liters
500
34 m = __ mm
34,000 mm
500
Is the following precise, accurate, both, or neither?
Accurate and Precise