Measurements Flashcards
Science requires us to make _________ of the world around us
Observations
We will be measuring observable ______________ in the lab, and so we need to learn this skill set
Properties of matter
Observations that you observe
Qualitative
Measurements are ________ observations
Quantitative
What is the uncertainty of 45.872
+/- 0.001
Uncertainty of 0.1 cm if divisible by 10
+/- 0.01 cm
Uncertainty of 0.1 cm if divisible by 2
+/- 0.05
Uncertainty of 0.5 cm if divisible by 10
0.05 cm
Precision means it has ________
Reproducibility
Accuracy means it has _________
Correctness
How close the measurements in a series are to each other (grouping)
Precision
Refers to how close each measurement is to the actual value
Accuracy
Produces values that are neither all higher or all lower than the actual value
Systematic error
Produces values that are both higher and lower than the actual value
Random error
Sig figs in 123.45
5
Sig figs in 0.00012
2
Sig figs in 123.400
6
Sig figs in 10,300
3
Formulas for volume
L x W x H
1 x10^12
Tera
1x10^9
Giga
1x10^6
Mega
1x10^3
Kilo
1x10^2
Hecto
1x10^1
Deka
1x10^-1
Deci
1x10^-2
Centi
1x10^-3
Milli
1x10^-6
Micro
1x10^-9
Nano
1x10^-12
Pico
1 in = ____ cm
2.54 cm
1 m = ____ in
39.4 in
1 km = ____ Miles
0.621 mi
1kg = _____ lb
2.20 lb
1 gal = _____ quarts
4 quarts
1 qrt = ____ Fl oz
32 fl oz
1 L = _____ qrts
1.06 qrts
1 ml = ____ cm^3
1
The concave/convex curve of a liquid in a measuring container
Meniscus
Analog scales require that we line our eye up correctly to read the scale because of this
Parrallax error
K = C +
273.15
Equation for density
D = m/v
Density is a __________ property
Intrinsic
