Lab Safety and Procedures
True or False: Hot glass looks the same as cold glass
True
1 cm= ___ mm
10 mm
How many significant figures does this number have? 45
Two
Convert the following to scientific notation. 0.005
5 x 10-3
What is an "educated guess" called when conducting an experiment?
Hypothesis
In a laboratory, the following should not be worn:
a) loose clothing b) dangling jewelry c) sandals d) all of the above
d) all of the above
What is the base unit for the metric measurement of mass?
Grams
How many significant figures does this number have? 3800.
4 (trailing zeros are only important when there is a decimal)
Convert the following to scientific notation. 1,000,000
1 x 106
What do you call the factor that can be changed in a controlled experiment?
Variable
You have been injured in the laboratory (cut, burn, etc.) first you should do what?
tell your instructor (teacher)
Mass/Volume
How many significant figures does this number have? 0.046
Two
Convert the following to standard notation. 3.45 x 107
34,500,000
Determine whether the statement is an observation or inference: It was a cool night.
Observation
You are heating a substance in a test tube. Where should you always point the open end?
away from all people
How many Liters are in 2.52 x 104 ml?
25.2 Liters (1L=1000ml)
Complete the problem and round to the correct number of significant figures. 6 x 0.30
2
Convert the following to standard notation. 4.39 x 10-7
0.000000439
True or False: It is important for your hypothesis to be correct.
False.
The following footwear must be worn in the laboratory
closed-toed shoes
Convert 4568 kg to g
4568000g
Complete the problem and round to the correct number of significant figures. 31.66/0.02
2000 (1 sig fig)
Solve. (5 x 103)(1 x 106)
5 x 109
How many steps are in the scientific method? Name them.
6- question, research, hypothesis, experiment, data analysis, and conclusion.