1. Chapter 1 Lesson 1
page 26

2. Create the foldable on page 35 to help you take notes.
Cells
Cytoplasm
Tissue, Organs, and Organ Systems

3. What are cells? BrainPop- Cells frog cells amoeba cell
Cells are the smallest units of living things that can carry out the basic processes of life.
amoeba cell
Discuss the Main Idea
Let students discuss the relationship between cells and living things. Ask:
What are all living things made of?
cells
How many cells does an organism have?
Some have only one cell (unicellulary organisms). Others have many cells (multicellular organisms).
Where do cells come from?
other cells
Develop Vocabulary
Organism Ask students to name examples of organisms.
Possible answers: bacteria, fungi, algae, protests, plants, animals
Cell Scientific vs. Common Use Remind students that cell is used to refer to parts of larger things, such as the rooms in a jail or monastery, the small spaces in a honeycomb or a filter, and the smaller area in a digital-phone network. Relate this to the scientific use.
Unicellular Word Origin Tell students that unicellular has three parts: the base word cell, the prefix uni–, meaning “one,” and the suffix, –ular, making the word an adjective that means “with one cell.”
Multicellular Word Origin Tell students that the prefix in multicellular comes from the Latin word multus, which means “many.” The suffix –ular makes the word an adjective that means “with many cells.”
Quick Check
Compare and Contrast: How are unicellular and multicellular organisms similar and different?
They are similar because they are both made of cells. They are different because unicellular organisms are made of just one cell while multicellular organisms are made of many cells joined together.
Critical Thinking: Why do you think there are more unicellular organisms than multicellular organisms?
Answers will vary. Possible answer: Most unicellular organisms are much smaller than multicellular organisms and have simpler structures. They do not require as many resources or as much space.
BrainPop- Cells

4. What are cells? What is an organism?
An organism is a living thing made of the same tiny building blocks.
From the smallest organism to the largest, they are all made of _____.
cells
A cell is the smallest unit of living things that can carry out the basic processes of life.
What are life processes?
moving parts of the body, reproduction, responding and reacting, getting food to stay alive, getting rid of waste, turning food into energy

5. Where do cells come from?
Cells come from other cells. Every cell in every living thing on Earth originally came from another cell. A cell divided, or split into two cells, and so did the cell before that, and so on.
Think about it this way…where did you come from? Where did your parents come from?

6. What types of cells are there?
Scientist have discovered 1,500,000 different kinds of organisms.
Scientist believe there are still more than 1 billion unicellular organisms that have not been identified.
A unicellular, or one-celled, organism is made of a single cell that carries out its life processes.
If unicellular is one celled, what is an organism that is made up of more than one cell called?
multicellular

7. Identify the parts of the cells
*Animal Cell
Animal Cell
* Plant Cell
Both plant and animal cells perform life processes by using organelles. Organelles have functions that help keep the cell alive.

8. What is inside an animal cell?
vacuoles
nucleus
cytoplasm
mitochondria
Discuss the Main Idea
Tell students that cells are able to perform all the activities that keep organisms alive. Discuss how organelles in the cell cytoplasm carry out these activities and how the cell membrane acts as a wrapping around the cell to keep the cell intact. Ask:
Which organelle controls the cell’s activities?
nucleus
What do mitochondria do?
They supply energy for the cell by breaking down food.
Where are wastes stored in cells?
in vacuoles
Develop Vocabulary
Discuss the difference between organism and organelle. Point out that organelles perform life processes within the cell. Organisms can survive on their own, but organelles work within cells.
cell membrane Remind students that the cell membrane surrounds the cell. The word membrane means any layer that separates two regions. Tell students that the head of a drum is sometimes called a membrane as well. Ask what regions the drum membrane separates.
cytoplasm Have students point to the cytoplasm in the diagram on page 30. Remind students that the cytoplasm is mainly water, and that organelles move within it freely.
nucleus Word Origin The word nucleus comes from the Latin word nuculeus, which means “nut” or “kernel.” Have students explain how the word origin relates to the term’s meaning. A kernel is a small, dense object.
Quick Check
Compare and Contrast: How is the membrane surrounding the nucleus similar to the cell membrane?
Both membranes allow certain materials in and out of the region they surround.
Critical Thinking: Do you think a cell would function without a nucleus? Explain your answer.
Possible answer: I do not think a cell can function without a nucleus. The nucleus controls the cell’s activities. A cell would not be able to break down food to provide energy, grow or move without a nucleus. [Some students may know that certain cell s (e.g. red blood cells) do not have a nucleus and still function.]
cell membrane

9. What is inside a plant cell?
vacuole
mitochondria
nucleus
cytoplasm
cell membrane
chloroplast
Discuss the Main Idea
Lead a discussion about the differences in how plants and animals live. Ask:
Do plants need to eat food?
No, they make food.
What helps plants get energy and make food?
sunlight
Develop Vocabulary
chlorophyll Word Origin Point out that chlorophyll comes from two words. The first part, chloro, comes from the Greek word chloros, meaning “light green.” The second part, phyll, comes from the Greek word phyllon, meaning “leaf.” So, chlorophyll is the substance that makes leaves green.
cell wall Point out that cell wall is a compound term. Ask students to point out the two words in cell wall and their definitions. Cell is a basic unit of a living thing; wall is a divider between things. Have students discuss how the two terms combine to describe a cell wall.
Quick Check
Compare and Contrast: Which cell has a stronger outer covering― a plant cell or an animal cell?
Plant cells have a stronger outer covering because they have both a cell membrane and a cell wall. An animal cell only has a cell membrane.
Critical Thinking: How are plant and animal cells alike? How are they different?
Plant cells have chloroplasts and a cell wall. Animal cells have smaller vacuoles.
cell wall
BrainPop- Cell Structures
BrainPop- Specialization

10. Animal Cell pg 30 Plant Cell pg 32 Structures Cell Membrane
a flexible layer around the outside of the cell, like skin, controls what moves in and out of the cell
same
Cytoplasm
gel like liquid, occupies the area from the nucleus to the cell membrane, supports cell structure, mostly water, constantly moving
Nucleus
cell’s control center, large round organelle, found in center, sends signals to all other parts
Mitochondria
Oval, membrane organelles that supply energy for the cell, tiny power plant
Vacuole
Membrane-covered structure used for storage, some have many small, some have none
Same, except only have one large central vacuole
Cell Wall
none
An additional outer covering for strength
Chloroplast
where plants make their food, green b/c chlorophyll

11. Cells Alive Animal and Plant Cells
How can you tell the difference between a typical plant cell and a typical animal cell?
Compare and Contrast
Plant cell: has chloroplasts, cell wall
Both: have cell membrane, organelles
Animal cell: has many or no vacuoles
Compare and Contrast
Use graphic organizer 10, p. TR12.
How can you tell the difference between a typical plant cell and a typical animal cell?
Different: Plant cell: has chloroplasts, cell wall
Alike: Both: have cell membrane, organelles
Different: Animal cell: has many or no vacuoles
Cells Alive Animal and Plant Cells

12. 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.

13. Vocabulary Words for Lesson 1
cell
unicellular
organism
multicellular
What is a living thing made of tiny building blocks called?
an organism
A ________ is the smallest unit of a living thing that can carry out the basic processes of life.
cell
What is an organism that is made up of more than one cell?
multicellular
A ________, or one-celled, organism is made of a single cell that carries out its life processes.
unicellular

14. Review What are some examples of organisms?
plants, bacteria, fungi, algae, protists, animals
Where do cells come from?
other cells
Where are animal and plant cell’s organelles found?
in the cytoplasm
Where is waste stored in a cell?
vacuoles

15. Review Do you think that a cell would function without a nucleus?
Most cells would not be able to function without the nucleus. The nucleus controls the cells activities. A cell would not be able break down food to provide energy, grow, or move without a nucleus.
A red blood cell does not have a nucleus and still functions.
Do plants need to eat food?
No, they make their own food.

16. Review
What helps plants get energy and make food?
sunlight

17. Review Cells Simulation Cell Parts Cell Inspector
Podcast: How can you tell an animal cell from a plant cell?