CramX Logo
526163449 Cell Types SE Gizmos - Document preview page 1

526163449 Cell Types SE Gizmos - Page 1

Document preview content for 526163449 Cell Types SE Gizmos

526163449 Cell Types SE Gizmos

Explore different cell types using a virtual microscope! Compare plant, animal, and bacterial cells, learn their structures, and understand how living things harness energy and grow.

Alice Edwards
Contributor
0.0
0
12 months ago
Preview (3 of 10 Pages)
100%
Log in to unlock
Page 1 of 3
526163449 Cell Types SE Gizmos - Page 1 preview image151 GizmosName:Date:Student Exploration: Cell TypesDirections: Follow the instructions to go through the simulation. Respond to the questions andprompts in the orange boxes.Vocabulary:ATP, bacteria, cartoon dioxide (CO2), cell, cellular respiration, compound light microscope,eukaryote, multicellular, muscle cell, neuron, organelle, photosynthesis, prokaryote, protist, red blood cell,root hair cell, tissue, unicellular, white blood cellPrior Knowledge Questions {Dothese BEFORE using the Gizmo.)1.How do you know if something is alive? Describe some of the characteristicsofliving things.If something is alive, they can move and toreathe. Some of the characteristics of livingthings are that they can reproduce, meaning that they can make babies.2.Humans, plants and mushrooms are all alive. What do these organisms have in common?They all have cells. They can also harness energy from other sources. For example,plants harness energy from photosynthesis. And animals harness energyfromfood.Gizmo Warm-upIn theCeil TypesGizmo, you will use a light microscope to compare and contrastdifferent samples. On the LANDSCAPE tab click on theEtodealeaf{TurnonShow allsamplesif you can't find it.) Switc h to the MICROSCOPE tab to observe the sample as itwould appear under the microscope. By default, this microscope is using 40xmagnification.Drag the Coarse focus slider until the sample isfoeused as well as possible. Then, improve the focuswiththe Finefocusslider. What do you see?1.I thinkIsee cells.I cansee that the cells are very compacted to each other.2.Select the 40Dx magnification. If necessary, adjust the fine focus. Now, what do you see?When I zoomed in 4D0x I saw small dotted cells around a shape.Ithink they are smallplant cells. They are the smallest functional unit of an organism.The individual chambers you see arecellsthe smallest functional unit of an organism.
Page 2 of 3
526163449 Cell Types SE Gizmos - Page 2 preview imageActivity A:Observing cellsGet the Gizmo ready:On the LANDSCAPE tab. click on the woman'sright arm to choose the Human skin sample.Select the MICROSCOPE tab.- • :Introduction:Complex organisms are made upofsmaller units, called cells. Most cells are too small to beseen by the naked eye. Microscopes are used to magnify small objects, so here you will use a compoundlightmicroscope to observe the cells of different organisms.Question: What are similarities and differences between cells from different organisms?1.Match: Read about each microscope part. Match the description to the part on the diagram.BStage : Platform where a slide is placed.AEye piece: Lens at the top of the microscope that the userlooks through. This lens most commonly magnifies asample by 1Dx.CCoarse focusknobLarge knob that moves the stage upand down to focus the sample.DFine focus knob : Small knob that moves the stage over ashort distance to refine the focus.EObjective lens : A second lens that further magnifies thesample Microscopes usually have several objectivelenses with different magnifications. The totalmagnification is the product of the eyepiece magnificationand the objective lens magnification.FSlide: A rectangular piece of glass upon which a sample ismounted for viewing under a microscope.2.Manipulate: With 40x selected, use the Coarse and Finefocussliders to focus on the sample. Then,choose 40Dx and focus on the sample using theFine focusslider.A.Which focus knob is easier to use at 4Qx? 400x?Course focus is easier tofocus at 40x and Fine focusfor4D0x.Nucleus, cellmembrane,cytoplasmEL Turn on Show labels. What structures can yousee in human skin cells?C.Turn offShow labelsand tum onShow scale bars.The scale bar has a width of 20micrometers, or 20 pm. (There are 1.000 micrometers in a millimeter.) Using the scale bar.about how wide is a human skin cell?
Page 3 of 3
526163449 Cell Types SE Gizmos - Page 3 preview imageThe human cell is about 30 to 40 lums.3.ObserveAn o r g a n e l l e is a cell structure that performs a specific function. Observe the samples belowunder the highest magnification. Click theShow labelscheckbox to label the organelles. List theorganelles and approximate size of the cells in each sample.SampleOrganellesEstimated size (pm)Mouse skinCytoplasm, cell membrane, nucleus.15.Fly musclecytoplasm, cell membrane, nucleus.5Maple leafCell wall, cell membrane,cytoplasm,nucleus,vacuole.chloroplast.3-5EfocfeaCell wall, cell membrane,c ytop lasm .nuc 1eus. vac uo le.chIoropla st.1-2FungusCytoplasm,septum.nucleus.vacuole,cell wall, cellmembrane.5What do all of these samples have in common?All of the samples have 'cell membrane", "cytoplasm’, and nucleus.In eukaryoticcells, genetic material is contained inside a distinct, membrane-bound nucleus. Plantand animal cells are classified as eukaryotes.4.Observe: Click on the cow and observeE.c o / i u n d e r the highest magnification. Notice the microscopem ag nific ati on is la rg er to r th is org anis m . a nd notice the sea le ba r is smaller.A.What is the approximate size ofE. coli?B.What organellles are present inE. coli?SlumCell wall, cellm em brane ,cytopla sm.flagel lum .pi lus,n ucIeoid(dna)Nucleus.C.What organelleis missingfromE. coli?E. coffis an example of abacteria.Bacteria are classified asprokaryoticcells because their DNAisnot contained in a membrane-bound nucleus.5.Compare: L o o k a t t h eSand/siltsample under the microscope.Yes. they do.Itis not alive, sinceit isnot moving norbreathing.A.Turn on Show labels. Does sand/silt haveany internal structures?B.Do you think sand or silt is alive? Explain.
Preview Mode

This document has 10 pages. Sign in to access the full document!