fundamental
definition of chemistry
study of matter and changes it undergoes
anything that takes up space and has mass
Based on whether the chemical composition is altered (changed) or not. If yes, then it is a chemical change, if not, then it is a physical change.
Cesar salad
heterogeneous mixture
1st law of thermodynamics
matter and energy cannot be created or destroyed but can be transformed or transferred between objects.
what is a model
model is a workable explanation, description, and representation of a phenomenon
what is the sum of kinetic energy
the thermal energy
melting butter
physical
air
homogeneous mixture
the dispersal of energy
entropy
why people use model in science?
it is workable and has predictive power
list the states of matter, from least to most of kinetic energy
solid, liquid, and gas
remove the stain on cloth with bleach
chemical
pure table salt
ionic compound
-273.15oC and 0 kelvin
is medicine a pure science or applied science?
applied science
what is the known as the flow of kinetic energy (which is always flow from hot to cold)?
heat
physical
pure gold
pure element
state 2nd law of thermodynamics and give an example of it
the entropy (the disperse of energy) of an isolated system cannot never decrease, in other words, the usefulness of energy always decreases.
true or false: science is the only reliable way to seek truth. Why
false
Because science is a great tool to understand the mechanism of the physical world, but it cannot provide the answer why and who made things that way. In addition, science is wholly inadequate in explaining the spiritual world.
the measure of average kinetic energy
temperature
growing vegetable in the garden
chemical
CO2
molecular compound
it is impossible to get any system to reach absolute zero
3rd law of thermodynamics