a series of steps/process where a question is asked,
an experiment is done, and an answer is found. Steps
include: observation, question, hypothesis, prediction,
experiment, results, and conclusion.
Water
water molecules
molecules stay close together due to
hydrogen bonding. many molecules
are linked by multiple hydrogen bonds
(cohesion)
specific heat
the amount of heat that must be absorbed or lost
for 1g of that substance to change its temperature
by 1'C. Water has a high specific heat.
hydrophobic
substances
substances that are nonionic
and nonpolar, they repel water
(ex: oil and water)
pH in the body
there are many pH's in the body:
saliva and urine are 6, human
blood and tears are 7, and inside of
the small intestine is 8
Lab Safety
lab coats have to be
worn in order to
prevent clothes from
being stained
goggles have to be worn to
protect the eyes from
substances and sharp objects
students should listen to their
teacher for directions in order to
prevent accidents.
Elements
Trace elements
elements that are required by an
organism in only small quantities.
Atomic Mass
the sum of the protons and neutrons in the
nucleus of an atom, it is an approximation of
the total mass of an atom
Essential elements
elements that an organism needs
to live a healthy life and reproduce
Nature
Natural Selection
a theory created by Charles Darwin that
proposed that individuals with inherited
traits that are better suited to their
environment are more likely to survive and
reproduce than less well- suited individuals
Classification
Biologists identify and classify species as they are found.
There are 8 levels of classification: domain, kingdom,
phylum, class, order, family, genus, and species