Studying the organization of life

• All living things are connected.

Environment

• The environment is anything that affects that organism.

• This includes two main groups: – Abiotic

– Biotic

Abiotic Factors

• Abiotic factors are parts of the environment that are not alive. They are the physical factors such as water, soil, light, and temperature.

• The nonliving factors that effect living things

Biotic Factors

• Biotic factors are parts of the environment that are alive and interact with each other

• The living things in the environment. Ex: plants and animals.

Biotics (alive)

Abiotics (not alive)

*In science, the addition of an “A” to the beginning of a word usually means “not” or “opposite of”

Levels of Organization

• atom– the smallest part of an atom

• protons, neutrons, and electrons

• molecule– smallest part of a compound with unique properties

• tissues– group of similar cells performing a job or function

Levels of Organization

• organ– The tissues organized into brain, heart, lungs, stomach,

etc.

• organ system– Organs working together (circulatory, digestive, etc)

• organism– Individual living thing (person, dog, plant, etc)

Levels of Organization• population– a group of one kind of organism (species) in an area that

can interbreed & make fertile offspring.

• community – Several populations of organisms in an area (animals in a

zoo)

• ecosystem– All living (biotic) and nonliving (abiotic) parts of an

environment.

Agenda• Create a graphic organizer for the following words:• atom• molecule• tissues• organ• organ system• organism• population• community • ecosystem.

– Hint : Use your textbook to define the above words.