• Cells

Big Idea
Cells are systems. Each part has its own function, and they all have to work together.

Essential Questions
• Explain how a cell is a system.
• What do all cells have in common?
Choclandia
Every part of Choclandia has a function. If any part doesn't work properly, the chocolates won't get shipped out. If the machines don't work, no chocolate gets made. If the instructions aren't there, the bunnies can't make chocolate either. If the post office is closed, they can make all the chocolate they want, and you still won't get any in your Easter basket! All the parts must function properly. Draw and color-code what you imagine Choclandia looks like. (Do NOT substitute colors.) (If you weren't here for the story, read about Choclandia; then do your illustration.)
• Choclandia fence - brown
• books - green
• messenger bunnies - orange
• machines - black
• Choclandia factory - blue
• containers - brown
• Power stations - red
• trash trucks - green
• post office - purple

Guess what: cells are the same way! Just like Choclandia, they have many smaller parts that must all work together to make the cell function. Each part (organelle) on the animal cell diagram has a similar function to one of the parts of Choclandia. Read the functions of each organelle and the functions of each part of Choclandia to see which ones match. For example the Choclandia fence "helps them control who and what comes in and out." The cell membrane "controls what comes in and goes out of the cell." So they match! The Choclandia fence is brown, so the cell membrane should also be brown. The color of each organelle should be the same as the part of Choclandia that it matches. Be careful! The colors do not match from top to bottom on the keys. Also, don't copy the colors from the book's diagram, but you may use it to help you figure out which organelle is which (See p.121 and pages after).
There are a few organelles that you probably can't figure out from the book:
• Messenger RNA looks like a zig-zag line on our diagram.
• Vacuoles and vessicles look like small bubbles. (not the tiny ones, those are ribosomes)
• Lysosomes look like small bubbles with stuff inside.

Bill Nye Cells

Cells are systems made of smaller parts called organelles. Each organelle has its own structure (shape, material, size) that helps it perform its function (job/purpose). Begin learning about cells and their organelles by watching Bill Nye cells. Be sure to take notes in your science notebook!

Cell Model Project
Work with your table group to build a 3-D paper model of an animal cell. While you are constructing the model, be sure to use the names of the organelles. (Biology is a foreign language. If you don't practice speaking it, you will never be able to!) At home and in class when you are done constructing your assigned organelles, study the names and functions of ALL the organelles. When we are done constructing the models, I will call your group up for an oral quiz. During the quiz, I will ask each person to name two organelles and tell me their functions. You should be helping your teammates study, but you may not help them on the actual quiz.

Study Tip! If you try to remember which part of choclandia matches each organelle, you will be more likely to remember the function of the organelle!

Organization of Living Things