Measurements
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tool of science
Math
We measure mass quantity of matter
Measurement
invariable and independent
Mass (kg,g)
• Varies relation to distance • Depend on the gravitational force • The lower the gravitational force, the lower the weight and vice versa
Weight
• Space occupied by substance or object • Bigger space = bigger volume
Volume (liter, mL)
• Distance covered of the certain object • How long or short the object is
Length
Volume, mass degrees Fahrenheit, Celsius (American system), or kelvin (absolute temperature). Amount of kinetic energy present in a substance.
Temperature
High Temp (hot)
Large K.E
Low Temp (cold)
Low K.E
Water Boils at
100 degrees celsius, 112 degrees Fahrenheit, 373 Kelvin
• Derived dimension and derived units. • lightness /heaviness of a substance • Dense or not dense • Depends on mass per given volume
Density (g/mL)
The ratio of density of the substance being referred to and density of water.
Specific Gravity
• Close to each other • e.g. 76,77,76
Precise
Close agreement in true value
Accurate
(Internet, books)
True values
Measurement can be
Metric System (Philippines)
Metric System
Kilogram (mass)
• Rounded off • Reliability in terms of large numbers • More accurate = more significant
Significant Figures
• useful for very large and very small numbers, especially in non-SI units. • Diamond is a pure carbon Arrangement of carbon
Scientific Notation
empirical science
Chemistry
Chemistry is studied by
• Measuring physical properties and observing chemical reactions. (Boiling point, formation of bubbles? change in color so there is a reaction) • Supported by facts and evidences
are created to explain observations and organize collected data.
Models
recorded via measurements. (Recorded the temperature)
Observation in Science
included in observation
UNIT OF MEASUREMENTS