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Step 1/2: Explorations in Mathematics and Science Teaching Title of Lesson: Animal and Plant Cell Organelles UFTeach Students’ Names: Nicole Steele Teaching Date and Time: Monday, September 24 from 8:30-9:20 am Length of Lesson: 50 minutes Grade / Topic: 10th grade/ Honors Biology Source of the Lesson: All the sources of this lesson are from the Internet. The jello cell model idea came from www.enchantedlearning.com, the engagement and elaboration videos from YouTube, and part of the worksheet diagrams and answers from http://www.lahc.cc.ca.us/biology/bio3/mchernoff/quiz.html. Appropriateness for High School Students: This lesson addresses the functions of animal and plant cell organelles and how the cell membrane is a highly selective barrier. This material is advanced enough for high school students since the information is detailed. The high school students will make their own observations and learn about animal and plant cells via completion of a worksheet. The teaching strategies include using models, diagrams, and videos in order to engage students and allow them to visualize animal and plant cells. Concepts Animal and plant cells are composed of several different organelles that have unique functions that help the cells perform their duties. Animal and plant cells both have a nucleus, nuclear envelope, nucleolus, cytoplasm, mitochondria, vesicles, Golgi apparatus, rough and smooth ER, ribosomes, lysosomes, and cell membranes. However, plant cells also have cell walls, chloroplasts, and larger vacuoles. It is important to note why these cells have different organelles. For instance, plant cells require more protection and thus have a cell wall and cell membrane while animal cells only have a cell membrane. Plant cells perform photosynthesis in order to acquire food so chloroplasts are needed. Lastly, plant cells have larger vacuoles in order to store more water. When the vacuole is filled with water it becomes larger and pushes up against the cell membrane. This makes the cell membrane and wall sturdier and the plant cell becomes more rigid in turn. This gives plants its rigidness. Furthermore, the cell membrane acts as a highly selective barrier because it only allows certain particles or molecules into the cell through diffusion, osmosis, active transport, and passive transport. Passive transport does not require energy output from the cell and usually includes oxygen, carbon dioxide, and water. Active transport, on the other hand, transports larger molecules and therefore uses energy from the cell. Source: http://library.thinkquest.org/12413/structures.html http://www.lahc.cc.ca.us/biology/ Florida State Standards (NGSSS): SC.912.L.14.2 What are the functions of the animal and plant cell organelles? Cognitive Complexity: Moderate SC.912.N.3.5 Describe the function of models in science, and identify the wide range of models used in science. Cognitive Complexity: Moderate Performance Objectives Students will be able to explain the functions of the different plant and animal cell organelles Students will be able to identify the uses of models in science Step 1/2: Explorations in Mathematics and Science Teaching Materials List and Student Handouts Name tags Jello animal cell model o Lemon Jello o Plum o Gummy worms o Sour gummy worms o Gum drop o Twizzler o Pumpkin candy corn o Crushed candy corn pieces o Smarties o Crushed smarties Cell videos for engagement 24 copies of cell function worksheet PowerPoint presentation for explanation 24 copies of the formative assessment Advance Preparations Teacher will need to pass out nametags, create and display PowerPoint presentation for explanation, display jello cell model for engagement, set up videos for engagement, print out worksheets for exploration, and print out worksheets and assessments. Convert YouTube videos in order to play in classroom Each student can work with a partner for the exploration but each student receives his or her own worksheet Safety Make sure students are not allergic to any ingredients in the jello animal cell model if they taste it. 5E Lesson Templates ENGAGEMENT What the Teacher Directions and Probing Questions Teacher Will Do -The teacher will introduce the lesson and the benchmark -The teacher will play the videos -The teacher Time: 10 minutes Student Responses and Potential Misconceptions -Good morning! Today we will be exploring the functions of animal and plant cell organelles and the role of their cell membranes. -I would like you to make observations as you quietly watch the video. Notice anything that looks different, interesting, or strange to you. -This video takes you into an animal cell http://www.youtube.com/watch?v=zAUlmha1EPg -[I noticed the details -What did you notice about the animal cell when you were of the cell membrane, watching the video? and the organelles. I Step 1/2: Explorations in Mathematics and Science Teaching will ask the students questions about the videos shown also observed how the organelles seemed to float around a little in the cytoplasm] I noticed how much space is in between the organelles -What organelles did you see? -The teacher will ask students questions about the plant and animal cells -What did you observe about the nucleus? -Why does the nucleus have “holes” in it? -Make observations once again as you watch this video. We will journey into a plant cell. Think about what looks different in the plant cell. What looks funny, new, or strange to you? http://www.youtube.com/watch?v=gcVg3PnoI1Y&feature=relmfu -How different does the plant cell look from the animal cell? -What organelles did you see? -What did you notice about the cell wall? -[Cell membrane, nuclear envelope, nucleus, chromosomes, nucleolus, mitochondria, ribosomes, etc.] -[The nucleus has many components and is well protected] It is circular. -Not sure [These are the nucleus pores on the nuclear envelope that allow certain molecules in] -They look similar and both have cell membranes. [The plant cell has a cell wall and it is more rigid. An animal cell has a cell membrane but no cell wall. The plant cell has chloroplasts, chlorophyll, central vacuole, and Plastids] - Cell membrane [Cell wall, chloroplasts, nucleus, vacuole, cytoplasm] Step 1/2: Explorations in Mathematics and Science Teaching -It is more green than the animal cell membrane [it allows certain molecules into the cell and is more rigid since it is a wall] -Lastly, I am going to show you this video. It is a cell song. Make sure to pay attention to what he says and the functions of the organelles http://www.youtube.com/watch?v=rABKB5aS2Zg&feature=related -The teacher will show the jello animal cell to the students -Turn to your shoulder partner and share ONE thing you learned from the video. -Right now I am holding a jello model. -Is it a model of a plant or animal cell? -How do you know? -I will walk around the classroom with the jello animal cell model so everyone can study it -What is used as the cell membrane? -What kinds of food do you see in there? -The teacher will transition into the exploration -[Animal cell] -[It does not have chloroplasts like a plant cell and it has organelles that only animal cells have, like a cell membrane] -[A plastic bag] -[Candy, plum for the nucleus] -Now that we know what animal and plant cells look like inside, we will explore their functions. EXPLORATION What the Teacher Will Do Teacher Directions and Probing/Eliciting Questions -The teacher will transition into -We are now going to do an exploration and explain instructions activity in order to learn the functions of the organelles. -Teacher will pass out worksheet -I am passing out a worksheet that and explain instructions you will complete. You may work with your partner to complete it. -On the paper, there are two diagrams. One is a plant cell and the other is an animal cell. Label the organelles of each cell. There is Time: 15 minutes Student Responses and Misconceptions Step 1/2: Explorations in Mathematics and Science Teaching -Teacher will walk around the classroom and observe and help students with the worksheet a word bank on the bottom of each question to help you. Lastly, there is a question where you will have to match the organelle with its function. -The worksheet has TWO pages so remember to complete number 3 -You and your partner will have 15 minutes to complete the worksheet. -Do you have any questions before we begin? -I’m not sure [A cell wall is more rigid] - What is the difference between a cell membrane and a cell wall? - What does the mitochondria do? -What is the difference between Smooth ER and Rough ER? -Does a plant cell have a membrane or a wall? -Why does a plant cell have a larger vacuole? -The teacher will tell students how much time they have left every 5 minutes -The teacher will tell students to finish their activity -The teacher will transition into the explanation EXPLANATION What the Teacher Will Do -Teacher will go over the worksheet with the students and discuss the functions of the organelles -The diagrams will be on the board for students to see and for teacher to point to. -Teacher will call on students to -[The mitochondria create energy for the cell] -Smooth ER is in control of lipid synthesis [The Rough ER has ribosomes on it while the Smooth ER is smoother] -[Both] -I’m not sure [the larger the vacuole and the more water stored in it, the more rigid the cell wall will be. Therefore, the plant cell needs a lot of water in the vacuole so the cell is not flimsy.] -The cell membrane [The nuclear membrane or envelope] -What protects the nucleus? -It is time to finish up your worksheet so we can discuss what you found and what the answers are. Teacher Directions and Probing/Eliciting Questions -Now that you have all completed the worksheet we are going to go over it as a class -Let’s start with the first question 1. Use the terms below to label the organelles of the animal cell -Let’s start from the upper left and move down to the bottom. Time: 15 minutes Student Responses and Misconceptions -[Cell membrane] -[Lysosome, nucleus, nucleolus, nuclear membrane, vacuole, and Step 1/2: Explorations in Mathematics and Science Teaching give the answers. Teacher will correct answers if wrong. -What is the upper left space called? -Moving down the next ones are what? mitochondrion] -Starting from the top right and going down, what are the other ones? -[Cell wall, cell membrane, vacuole, nucleus, nucleolus, nuclear membrane, chloroplast, and mitochondrion] -[Cytoplasm, lysosome, rough ER, smooth ER, ribosomes, and Golgi body] -Very good! Let’s move on to labeling the plant cell. -What are the answers starting from the upper left to the bottom left of the diagram? -There may be confusion between Rough ER and Smooth ER on the diagram [Cytoplasm, Rough ER, Smooth ER, ribosomes, and Golgi Body] -[The Golgi apparatus] -[Chloroplasts] -[The cell membrane or wall] -[Ribosomes] -[Vacuole] -[Lysosome] -[Smooth ER] -[Rough ER] -[Cytoplasm] -What are the answers starting from -[Nucleus] the upper right to the bottom right -[Mitochondria] of the diagram? -Lastly, let’s go over the functions of each of the organelles -What packages proteins? -Good. They basically process materials manufactured by the cell and then package those products into small structures called “Golgi vesicles” -[The Golgi Apparatus] -What are closely stacked flattened sacs? -What do the chloroplast do? -[Chloroplast] -What protects the cell? -[Cell membrane/wall. The cell -[They aid in photosynthesis and creating ATP for the cell] Step 1/2: Explorations in Mathematics and Science Teaching -Where is the site of protein synthesis? -What stores material within the cell? -Which organelle is in charge of waste disposal and recycling? -Which organelle produces lipids? -Which is a source of proteins? -What is the jelly-like substance in the cell called? -What controls cell functions? -What is in charge of creating energy? membrane -[Ribosomes] -[Vacuole] -[Lysosome] -[Smooth ER. Smooth ER also generates new layers for Golgi bodies. ER serves as routes for the transport of materials from one part of the cell to the other] -[Rough ER] -[Cytoplasm] -[Nucleus. The nucleus also has DNA] -[Mitochondria. It is the powerhouse and creates ATP for the cell] -Let’s talk how the structures of the organelles relate to function and why animal and plant cells are so different. -What do plant cells have that animal cells don’t? -Why do plants have a cell wall and animal cells don’t? -Why do plant cells have larger vacuoles than animal cells? -Why do plants have chloroplast? -[Cell wall, a larger vacuole, and chloroplast] -[For extra support so they can maintain shape, structure, and rigidity] -[Plant cells have larger vacuoles because the vacuoles can then hold more water. This causes the central vacuole to become very full and Step 1/2: Explorations in Mathematics and Science Teaching -Teacher will explain the role of cell membranes as a highly selective barrier (passive and active transport) -Teacher will use PowerPoint slides to show students pictures of the barrier -Teacher will discuss the function and examples of models -What does the cell membrane do? -Do plants or animal cells have a cell membrane? -How does it act as a barrier? -The cell membrane is made up of a phospholipid bilayer that contains ion channels and glycoproteins. Basically, these let certain things into the cell -What does it let into the cell? -How does the cell let molecules in and out? -What is passive transport? -What’s diffusion? -What’s active transport? causes the cell to press against the inside of the cell wall. This makes the cell still and thus the leaf’s tissues will be stiff] -[Plants rely on photosynthesis in order to make energy and “food” so the chloroplast helps with this process] -[It separates the interior of the cell from the outside environment] -[Both animal and plant cells have cell membranes. Plant cells ALSO have a cell wall] -It is on the outside of the cell so it acts like a shield [The cell membrane also controls what comes into the cell and what is allowed to pass out of the cell. That is why it is a selective barrier.] -[Water] -I don’t know [Passive and active transport] -[A cell can let a molecule in or out without using energy from the cell. This includes the diffusion of oxygen and carbon dioxide, osmosis of water, and facilitated diffusion] -[The movement of molecules across a concentration gradient or from regions of higher to lower concentrations] -[Requires the cell to use energy and transports large molecules] - What is a model? -Why do we use models in science? -[A representation of a system or process] -Have we used a model today? -[To easily understand an abstract Step 1/2: Explorations in Mathematics and Science Teaching -Have we used more than one model today? -What models did we use? - The two diagrams are different than the jello cell model. Why are they also considered models? -What are some other examples of models used in science? -Teacher will transition into the evaluation -Teacher may transition from the exploration to the elaboration if time permits concept or process] -[Yes] -We just had the jello model [Yes, we have used more than one model today] -[We had the jello animal cell model as well as the two diagrams on your worksheets of the animal and plant cells] -[Because they are representations of animal and plant cells. We can’t actually see animal and plant cells without microscopes so the figures are models] -[Volcano projects, diagrams of Earth’s interior, a simulation of the Moon’s phases through the month around Earth, etc.] -Now that we have explored the functions of the organelles and how the cell membrane works, I’d like to see how much you have actually learned. ELABORATION What the Teacher Will Do Time: (15 minutes) Probing/Eliciting Student Questions Responses and Misconceptions -Teacher will show students this video once more http://www.youtube.com/watch?v=rABKB5aS2Zg&feature=related -The teacher will ask the students if all the organelles were covered in the video and if the video and song did a good job at explaining the material -The teacher will instruct the students to think of a unique or interesting way to teach others about cell organelles. This could be through a song, like in the video, or a rap, PowerPoint presentation, crossword puzzle, game, etc. The students should then present their ideas to the class. -The teacher should then transition from the elaboration to the evaluation. EVALUATION What the Teacher Will Do -The teacher will end the lesson -The teacher will give the students Assessment 1. How is the cell membrane a highly selective barrier? Time: 10 minutes Student Responses 1. The cell membrane acts as a barrier to the cell and the outside Step 1/2: Explorations in Mathematics and Science Teaching the assessment environment. It chooses what is allowed to move in and out of the cell therefore it is highly selective. With passive transport, the cell transfers water, oxygen and CO2, in and out of the cell without using energy. With active transport, cells use energy to transport large molecules. 2. Why do we use models in science? 3. State the functions of the following organelles: A. Cell Membrane B. Nucleus C. Cytoplasm D. Mitochondria E. Lysosome F. Chloroplast G. Golgi Apparatus 2. We use models in science to easily understand an abstract concept or process in science. Models are representations of a system and allow us to visualize something. Models can also be a form of evidence to back up a statement or idea. 3. A. Protects the cell and separates it from the outside environment B. Controls the cell C. Jelly-like substance found inside a cell that holds all the organelles in place D. Breaks down sugar molecules to release energy and is the site of cellular respiration E. Helps cell digest food and waste F. Turns sun’s energy into glucose G. Packages proteins made by ribosomes so they can leave the cell Step 1/2: Explorations in Mathematics and Science Teaching Exploration Worksheet Name: __________________________________________ Plants and Animal Cells 1. Use the terms below to label the organelles of the animal cell. Mitochondrion Lysosome Vacuole Smooth ER Golgi Body Nucleus Rough ER Ribosomes Cytoplasm Nuclear Membrane Nucleolus Cell Membrane 2. Use the terms below to label the organelles of the plant cell. Cell Wall Smooth ER Nucleus Mitochondrion Cell Membrane Nucleolus Nuclear Membrane Chloroplast Cytoplasm Rough ER Lysosome Vacuole Step 1/2: Explorations in Mathematics and Science Teaching Ribosomes Golgi Body 3. Match the functions with the organelles. 1. Packages proteins Nucleus 2. Closely stacked, flattened sacs Ribosome 3. Protects cell Smooth ER 4. The site of protein synthesis Rough ER 5. Stores material within the cell Cell membrane/wall 6. Waste disposal and recycling Cytoplasm 7. Produces lipids Golgi apparatus 8. Source of proteins Chloroplast 9. Jelly-like substance in cell 10. Controls cell functions Mitochondria Lysosome Step 1/2: Explorations in Mathematics and Science Teaching 11. Creates energy Vacuole Name: __________________________________________ Plants and Animal Cells ANSWERS 1. Use the terms below to label the organelles of the animal cell. 2. Use the terms below to label the organelles of the plant cell. Step 1/2: Explorations in Mathematics and Science Teaching 3. Match the functions with the organelles. 1. Packages proteins Nucleus (10) 2. Closely stacked, flattened sacs Ribosome (4) 3. Protects cell Smooth ER (7) 4. The site of protein synthesis Rough ER (8) 5. Stores material within the cell Cell membrane/wall (3) 6. Waste disposal and recycling Cytoplasm (9) 7. Produces lipids Golgi apparatus (1) 8. Source of proteins Chloroplast (2) 9. Jelly-like substance in cell Mitochondria (11) 10. Controls cell functions Lysosome (6) 11. Creates energy Vacuole (5) Step 1/2: Explorations in Mathematics and Science Teaching Name: ____________________________________ Assessment 1. How is the cell membrane a highly selective barrier? 2. Why do we use models in science? 3. State the functions of the following organelles: A. Cell membraneB. NucleusC. CytoplasmD. MitochondriaE. LysosomeF. ChloroplastG. Golgi Apparatus- Step 1/2: Explorations in Mathematics and Science Teaching Name: ____________________________________ Assessment ANSWERS 1. How is the cell membrane a highly selective barrier? The cell membrane acts as a barrier to the cell and the outside environment. It chooses what is allowed to move in and out of the cell therefore it is highly selective. With passive transport, the cell transfers water, oxygen and CO2, in and out of the cell without using energy. With active transport, cells use energy to transport large molecules. 2. Why do we use models in science? We use models in science to easily understand an abstract concept or process in science. Models are representations of a system and allow us to visualize something. Models can also be a form of evidence to back up a statement or idea. 3. State the functions of the following organelles: A. Cell membrane-Protects the cell and separates it from the outside environment B. Nucleus- Controls the cell C. Cytoplasm- Jelly-like substance found inside a cell that holds all the organelles in place D. Mitochondria- Breaks down sugar molecules to release energy and is the site of cellular respiration E. Lysosome-Helps cell digest food and waste F. Chloroplast- Turns sun’s energy into glucose G. Golgi Apparatus-Packages proteins made by ribosomes so they can be sent out of the cell