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intro to science


boiligist def of life (characteristics of life) 1.reproduction, development, growth 2.adaptations/ evolve 3.resond 2 stiluli 4.aquire materials/energy 5.organizedd
in multi-cellular organisms combine to form ____________. tissssssue (nerve tissue)
tissues make up ___________. organs
metabilism- encompases all the chemical reactions that occr in a cell.
homeostasis- maintainence or internal conditoins within certain boundaries
genes- contains specific info for how the organism is to be ordered. ,made of long dna molecules
levels or biological organization atoms -> molecules -> cells -> tissue -> organ -> organism -> population -> community -> ecosystem -> biosphere
atom - smallest unit of a molecule
molecule - smallest unit of a compound
cell - smallest unit of a living thing
tissue - group of cells with common structure/function
organ - several tissues organized for a particular job
organism - complex individuals containing organ systems.
population - several organisms of the same kind in a certain area.
community - interacting populations in a particular area.
ecosystem - a community + the environmment
biosphere - the earth's crust, waters, and atmosphere which are inhabited by living things.
energy - capacity to do work / keeps things in order
metabolism - all the chemical reactions in a cell.
ultimate source of energy - sun
biotic - living
abiotic - nonliving
human impact on biosphere: we mod it for our own purposes
why do we have a classification system? live is so diverse, it's universal
categories of classification,(least to most specific) : domain, kingdom, phylum, class, order, family, genus, species.
3 types of domains: bacteria, archaea, eukarya
4 kingdoms: protists, fungi, plants, animals
do eukaryotes have a nucleus? yes
binomial name: 2 part name that is universal. first word is genus, second is specific species within a genus
do prokaryotes have a nucleus no.
randomized study - ensures there's no bias
double blinded study - both test subjects and investigators don't know who is getting what treatment
is it good to have a small sample? nope.
you're ego is... your own comparison of you to another person (self esteem)
biology is the sudy of_________. life
scientific process involves using the ________ ________. scientific method
The flow of the scientific method "Levels" are... Observation -> hypothesis -> experiment -> conclusion -> Scientific theory (or hypothesis if the old hypothesis isn't right)
inductive reasoning is _________. Using creative thinking to combine isolated facts into a cohesive whole, to come up with a hypothesis.
hypthesis - possible explanation for a natural event
deductive reasoning - use4d to test a hypothesis using if, then, logic
experimental design - manner in which a scientist intends to conduct an experiment.
control group - goes through all the steps of an experiment but is not exposed to the factor being tested.
conclusion - whether or not the hypothesis is true or false.
experiments and observations must be... repeatable by any scientist, to get the same result
scientific theories - concepts that join together well supported and related hypothesis.
principle (or law) - theory, but is trusted by a ton of scientists. is accepted as true.
independent variable - factor of the experiment being tested.
dependent variable - result or change that occurs due to the independent variable.
Created by: brn2plyhcky7