Chapter 1 Flashcards
Define macroscopic.
Large enough to be seen with the unaided eye.
Define submicroscopic.
Too small to be seen even with a microscope. Like atoms and molecules.
What is a law?
A concise statement of a reliable relationship between phenomena.
What is a hypothesis?
A tentative observation for an observation, tested by further experiments.
What is a theory?
A principle that explains experimental observations and the laws that are based on them.
Prefixes used with SI units?
Tera- T 1x10^12 Giga - G 1x10^9 Mega- M 1x10^6 Kilo- k 1x10^3 Deci- d 1x10^-1 Centi- c 1x10^-2 Milli- m 1x10^-3 Micro- (mean symbol) 1x10^-6 Nano- n 1x10^-9 Pico- p 1x10^-12
Kelvin conversion?
K = C +273.15
Freezing point and boiling point of water?
FPH2O=273.15 K
BPH20=373.15 K
Fahrenheit to Celsius conversion?
F = (C x 1.8) +32
What is a mixture?
Combination of two or more substances.
Homogeneous?
An even distribution. For example air, alloys and vinegar.
Heterogeneous?
Not uniform. For example the atmosphere, milk, m and m’s.
What is quantitative data?
Describe using numbers.
Qualitative?
The description of the sample.
Intensive properties?
Measured values that do not change with amount of water. For example density, boiling point, freezing point.
