Chapter 2: Living things
Section 1: What is life?

Organism: ____________________________________________________________________________________________
o Examples: ___________________________________________________________________________
ALL LIVING THINGS SHARE THESE CHARACTERISTICS:
1. ____________________________________________________________
2. ____________________________________________________________
3. ____________________________________________________________
4. ____________________________________________________________
5. ____________________________________________________________
6. ____________________________________________________________
Cellular Organization

All organisms are made of small building blocks called ______________________________

A cell is ___________________________________________________________________________________________________________

Cells are so small you need a _______________________________________ to see them

Unicellular: ___________________________________________________________________________________________________

Multicellular: __________________________________________________________________________________________________
o Example: ______________________________________________________________
The Chemicals of Life


Cells are composed of _______________________________________
SUCH AS…
o _______________________________________________
o _______________________________________________
o _______________________________________________
o _______________________________________________: genetic materials, chemical instructions that
direct the cell’s activities
Energy Use

Cells of organisms use ______________________________ to do what living things must do

Example: ___________________________________________________________________________

An organisms cells are _________________________________ hard at work
Response to Surroundings

____________________________________________________________________________________________________________________

STIMULUS:
______________________________________________________________________________________________________
o Example: temperature, light, sound….

RESPONSE: an ______________________________ or change in behavior
 Example: A plant stem growing toward the sun.
Growth and Development

Living things _______________________ (getting larger) and ___________________________

Development: ________________________________________________________________________________________________
Reproduction

Organisms have the ability to ____________________________________, or ________________________________________
that are similar to the parents
o Example: Robins lay eggs… that develop into young robins… that closely resemble their
parents!
Life Comes from Life

________________________________________________________________________________________________________________
….But, four hundred years ago people believed that life could appear from nonliving things… CRAZY!?!?!

SPONTANEOUS GENERATION: __________________________________________________________________________
________________________________________________________________________________________________________________
Redi’s Experiment
Pasteur’s Experiment
Who was he?
Experiment
Results
The Needs of Living Things
All living things need…
1.
2.
3.
4.
Water

All living things ______________________________________________________________________.

Why?
1.
2.
3.
4.
Food

Organisms use ___________________________________________________________________________________________________

Plants: ____________________________________________________________________________________________________________

Organisms that make their own food are called _________________________________
Examples: __________________________________________________________

Organisms that CANNOT make their own food are called _________________________
Examples: _________________________________________________________
Living Space

All organisms need a place to live

Its surrounding _________________________________________________________________________________________________

How do trees compete for space?
o Top of the trees for ____________________
o
o Below the ground for __________________
Come up with an example on your own! (write the example below)
Stable Internal Conditions

Organisms must be able to keep conditions inside their bodies ___________________________________________
___________________________________________________________________________________________________________________

….this is called _______________________________________.
Example: Your body temperature stays steady even when there are changes in air temperature.