Scientific Method
Whats a matter with you?
Math
Knowledge gems
Conversions
100
A logical approach to the solution of scientific problems
Scientific Method
100
Chemical or physical change: combustion
chemical
100
Answer with sig figs
12.52+349.0+8.24
369.8
100
Convert 25oC to Kelvin
298 K
100
Prefix for 10-2
centi
200
An educated guess based on observations
Hypothesis
200
Physical or chemical property: density
Physical
200
m=3.1g
v=0.35 mL
D=?
D=8.9 g/mL
200
What is wrong with this compound?
Feco3
Capitalization of the elements
200
579 m=?km
0.579km
300
Was your hypothesis correct?
Conclusion
300
A mixture that you can see the individual components ie salad
heterogeneous mix
300
(4x107)(2x10-3)
8x104
300
Which of the targets is precise but not accurate?
B
300
30 mL=L?
0.030L
400
Discriptive data
Qualitative data
400
What are the products?
Carbon dioxide and water
400
How many sig figs?
0.000780
3
400
What is the density of calcium?
1.54 g/mL
400
0.000 0078 L=? microL
7.8 microliters
500
A broad and extensively tested explanation of why repeated experiments give certain results
Theory
500
When ammonium nitrate (NH4NO3) explodes, the products are nitrogen, oxygen, and water. When 40 grams of ammonium nitrate explode, 14 grams of nitrogen and 8 grams of oxygen form. How many grams of water form? (NH4NO3 -> N2 + O2 + H2O)
18 g
500
D= 10.5 g/mL
M= 2500g
V=?
240 mL
500
What element is Kr?
Krypton
500
0.704g= ?mg
704 mg