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Chapter 2 - Science

chapter 2 info

AB
spontaneous generationa theory that states that life can spring from nonliving matter
metabolismall chemical activities in an organism
ingestiontaking in food ; eating - metabolism
digestionprocess by which food is brocken down into simpler substances - metabolism
respirationprocess in which living organisms take iin oxegen and use it to produce energy - metabolism
excretionprocess of getting rid of waste materials - metabolism
life spanmaximum length of time an organism can be expected to live
stimulussignal to which an organism reacts ; change in the environment
responsesome action or movement of an organism broght on by stimulus
reproductionprocess by which living things give rise to the same type of living thing
sexual reproductionprocess of reproduction involving two parents
asexual reproductionreproduction requiring only one organism
Living things need...Energy - Food - Water - Air - Living Space - proper temperature
Homeostasisability to keep insides the same temp - even when outside change
warmbloodedactive both day and night - mantain proper temp.
coldbloodedchange temp w/environment - active in day - soak up sun light
Atomsbuilding blocks of matter
Protonspositive charge
neutronno charge
electronnegitive charge
CalciumCa
CarbonC
ChlorineCl
FlorineF
HydrogenH
IronFe
MagnesiumMg
NitrogenN
OxygenO
PotassiumK
SiliconSi
SodiumNa
SulfurS
Compound2 or more different ELEMENTS bonded 2gether
Molecule2 or more atoms bonded 2gether
Most abundant elements...carbon - hydrogen - nitrogen - oxygen
Francesco RediItalian doc - 1668 - meat w/covers - and flies - proved flies can't get at met=no maggots
Chem. Formulasshow which atoms and how many
Lazzaro SpallanzaniItalian Scientist - 1776 - broth exper. - microbes killed by boiling - microbes reproduct
Louis PasteurFrench sci.- 1864 - S-shaped necked jars - saw microbes in air - everywhere -contest

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