the science of life
DESCRIPTION
The Science of Life. Biology bio = living or life -logy = the study of. Characteristics of Life. Cells All living things are composed of cells. Organization All living things are highly organized At the molecular and cellular level From atoms to organisms Energy Use - PowerPoint PPT PresentationTRANSCRIPT
The Science of Life Biology
bio = living or life -logy = the study of
Characteristics of Life Cells
All living things are composed of cells. Organization
All living things are highly organized At the molecular and cellular level
From atoms to organisms Energy Use
All living things use energy in a process called metabolism.
Sum of all the chemical processes that occur in the organism
Characteristics of Life Homeostasis
All livings maintain stable internal conditions. Example: water balance, temperature
Growth All living things grow, as do many nonliving
things. Some nonliving things, like rock crystals, grow by
accumulating more of the materials they are made of.
Living things grow by cell enlargement and cell division.
Characteristics of Life Reproduction
All species of organisms have the ability to reproduce.
Change Through Time Populations of living organisms evolve
through time Importance: without change a specie
is prone to becoming extinct.
Biology- Classification Three Domains of Life
Bacteria, Archaea, Eukarya Six Kingdoms
Eubacteria Archaebacteria Protista Fungi Plantae Animalia
Scientific Method
(1) Observation (Identify a problem)
(2) Research the problem(3) Form a hypothesis
Scientific Method(3) Hypothesizing
(a) Hypothesis is a suggested explanation for what has been seen and recorded, it explains your observations and can be tested.
(b) Very important step
(4) Predicting * To test a hypothesis, scientists make a
prediction that logically follows from the hypothesis.*A prediction is a statement made in advance that states the results that will be obtained from testing a hypothesis, if the hypothesis is supported.*Most often takes the form of an “if-then” statement.
Scientific Method(5) Experimenting
(a) the process of testing a hypothesis or prediction by gathering data under controlled conditions.(b) Controlled experiment
* based on a comparison of a control group with an experimental group the control group and the
experimental group are designed to be identical except for one factor.
Scientific Method Independent variable is the one factor.
+ horizontal (X) axis Dependent variable is measured or observed
in both control and experimental groups. Dependent because it is driven by or results from the independent variable.
+vertical (Y) axis
(c) Analyzing Data(6) Drawing conclusions
(a) Modeling- Visual, verbal, or mathematical(b) Inferring- a conclusion made on the basis of facts or premises rather than on direct observations.
Scientific Method
(c) Forming a Theory- a broad and comprehensive statement of what is thought to be true. Supported by considerable evidence and may tie together several related hypotheses.