What makes something living?
Chapter 1, section 2, 3, & 4
How can we identify something as living?
Living or nonliving?
Living or nonliving?
Characteristics of Life
Organization
• Very rigid and orderly structure at all levels
Reproduction
• Every living thing has a life span;
Growth & Development
• Living things change physically and mentally during their lives
Respond to Stimuli
• Adaptations
• Evolution
• Homeostasis
Metabolism
• Require energy
What do organisms need to
SUSTAIN life?
Raw Materials
Place to live
Where does life come from?
Spontaneous
Generation
Biogenesis
 Living things from
 Living things from living
nonliving things
 Disproved THEORY
things
 Accepted THEORY
Pioneers of Classification
 Aristotle
 Categorized living things into simple categories (plant or
animal; four legs or two legs; hair or no hair; etc.)
 Linnaeus
 Used a much more detailed classifications system
 BINOMIAL NOMENCLATURE two word naming
system still used today
Create a sentence using the following
letters as the first letter in each of the
words of your sentence.
 K
 P
 C
 O
 F
 G
 S
Create a sentence using the following
letters as the first letter in each of the
words of your sentence.
 King
 Philip
 Cut
 Open
 Five
 Green
 Snakes
How do we classify living things?
TAXONOMY
Kingdom
• Largest category
Phylum
Class
Order
Family
Genus
Speci
es
• Smallest, most specific category
Real Life example
Planet Earth
North America
United States
Pennsylvania
York
County
York
Catholi
c HS
Rm
• REALLLY specific
123
• Really broad
category
Tools for identifying organisms
DICHOTOMOUS
KEY detailed
“field guide” for
identifying the
scientific names of
organisms