1. Name the 5 levels of cellular organization in order!
Bell Ringer
Name the 5 levels of cellular organization in order!

2. Yesterday Bell Ringer Chapter 1 section 2 vocabulary
Chapter 1 section 2 re-read
#1-6 page 43

3. Today
Bell Ringer
Quick review of section 1
Classification

4. Core Content/I can 3.4.1, 3.4.2, and 3.4.3 (posted on bulletin board)
I can describe the 7 levels of classification.

5. How are cells organized?
Cells form tissues, tissues form organs, and organs work together in organ systems.
How are cells organized?
cell
tissue
organ
organ system
Discuss the Main Idea
Explain that as the number of cells in an organism increases, cells must specialize in one or a few activities in order for the organism to function well. Ask:
What is the advantage of specialization?
If individuals concentrate on certain tasks, they become better at that specific job.
Develop Vocabulary
Tissue Word Origin The word tissue comes from the Latin word texere, meaning “to weave.” A tissue is like a woven piece of cloth but made of cells.
Organ Scientific vs. Common Use Explain that organ also refers to a kind of musical instrument.
Organ system Have students name some animal organ systems.
Possible answers: digestive, circulatory, nervous, reproductive
Quick Check
Compare and Contrast: How do organs compare to organ systems?
Possible answers: Organs are made of tissues and make up organ systems. In organ systems, organs work together to carry out a function of an organ system such as digestion.
Critical Thinking: How are complex organisms organized?
Possible answer: Complex organisms are made up of cells that form tissues, tissues that form organs, and organs that form organ systems.
All of the cells, tissues, organs, and organ systems form an organism.

6. Lesson 1 Main Idea Review
What is the main difference between the ways unicellular and multicellular organisms are organized?
Unicellular organisms perform functions on their own. Multicellular organisms have special cells, tissues, and organs to do tasks.
Main Idea
What is the main difference between the ways unicellular and multicellular organisms are organized?
Unicellular organisms perform functions on their own. Multicellular organisms have special cells, tissues, and organs to do tasks.

7. Lesson 1 Vocab a Review Vocabulary
___________ is able to use the energy in sunlight.
Similar cells working together at the same function
form a ___________.
A ___________ is the smallest unit of living things
that can carry out the basic processes of life.
A group of tissues working together to perform
a specific function form an ___________.
Chlorophyll
Vocabulary
A) __________ is able to use the energy in sunlight.
B) Similar cells working together at the same function form a __________.
C) A __________ is the smallest unit of living things that can carry out the basic processes of life.
D) A group of tissues working together to perform a specific function form an __________.
A-chlorophyll, B-tissue, C-cell, D-organ
cell
chlorophyll
organ
tissue

8. Lesson 1 Vocab b Review Vocabulary
Organs that work together to perform a certain
function make up an _____________.
_____________ organisms are made of more than
one cell.
An _____________ is a living thing.
_____________ organisms are made of a single
cell.
Multicellular
Vocabulary
A) Organs that work together to perform a certain function make up an __________.
B) __________ organisms are made of more than one cell.
C) An __________ is a living thing.
D) __________ organisms are made of a single cell.
A-organ system, B-multicellular, C-organism, D-unicellular
Unicellular
multicellular
organ system
organism
unicellular

16. organ system (ôr´gən sis´təm) A group of organs that work together to do a certain job. (p. 28)

17. Lesson 2 Splash classification kingdom species vertebrate invertebrate
vascular
Look and Wonder
Scientists have identified and grouped about two million types of organisms. How do they organize all these living things?
Invite students to share their responses to the Look and Wonder statement and question:
How do scientists organize all these living things?
Scientists classify organisms according to how closely they are related and to their similarities, such as physical characteristics, how an organism obtains food or reproduces, where an organism lives, and genetic information.
Write ideas on the board and note any misconceptions that students may have. Address these misconceptions as you teach the lesson.
nonvascular
Lesson 2 Splash

18. Lesson 2 a How are organisms classified?
Kingdom
Phylum
Class
Scientists classify organisms by sorting them into groups according to shared characteristics.
Order
Family
Discuss the Main Idea
Have students discuss why classification is necessary and some possible criteria for placing organisms in groups. Ask:
What are the names of two kingdoms of organisms?
plants and animals
Why are smaller groups necessary in classification?
A large group, such as a kingdom, contains too many organisms. Smaller groups of similar organisms are easier to study.
Develop Vocabulary
Classification Remind students that –tion is a suffix that indicates classification is the noun form of a verb.
Kingdom Scientific vs. Common Use Remind students that kingdom is used to refer to an area ruled by a monarch such as a king. Relate this to the use of the word kingdom in biology.
Species Word Origin Tell students that species comes from a Latin word that means “to see.”
What does this information tell you about early work classifying organisms into species?
Scientists may have made decisions based on what they could see.
Quick Check
Classify: What is the broadest classification group? The narrowest group?
broadest: kingdom; narrowest: species
Critical Thinking: Why do scientists use only the genus and species names to identify an organism and not all of the classification groups?
Possible answer: Only the genus and species are unique so they are the only ones needed to identify the organism. Using all the names would be awkward.
Genus
Species