Gizmos Cell Types Lab (142 points).

Name: Luisa Hernandez Cell Types Lab (142 points) Directions 1. Go to 2. Complete the “Cell Types” Gizmo *DO NOT FORGET TO ANSWER THE 5 QUESTIONS IN THE GIZMO. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) (3 points) 1. How do you know if something is alive? Describe some of the characteristics of living things. Reproduction- to make more of the same organism Sensitivity- the ability to detect and react to stimuli Nutrition- eat and digest food Movement- the ability to change its position or location Respire- to breathe/ gas exchange Excretion- to get rid of toxic/ materials in excess 2. Humans, plants and mushrooms are all alive. What do these organisms have in common? Humans, plants, and mushrooms all are made of cells. Humans, plants, and mushrooms also maintain homeostasis. Mushrooms and animals share a similar chemical called fungi. All of there things reproduce. Humans, plants, and mushrooms all take in and use energy. Humans, plants, and mushrooms grow and develop through time. Humans, plants, and animals all have something in common other than being alive. Gizmo Warm-up (2 points) In the Cell Types Gizmo, you will use a light microscope to compare and contrast different samples. On the LANDSCAPE tab, click on the Elodea leaf. (Turn on Show all samples if you can’t find it.) Switch to the MICROSCOPE tab to observe the sample as it would appear under the microscope. By default, this microscope is using 40x magnification. 1. Drag the Coarse focus slider until the sample is focused as well as possible. Then, improve the focus with the Fine focus slider. What do you see? I see oval green cells, multiplying. 2. Select the 400x magnification. If necessary, adjust the fine focus. Now, what do you see? I see the inside of the oval green cells. On the inside there are little neon circles around the edges. In the middle there is a circle that is the same size as the cell, and a small oval. The individual chambers you see are cells, the smallest functional unit of an organism. Activity A: Observing Cells (27 points) Get the Gizmo ready: ● On the LANDSCAPE tab, click on the woman’s right arm to choose the Human skin sample. ● Select the MICROSCOPE tab. Introduction: Complex organisms are made up of smaller units, called cells. Most cells are too small to be seen by the naked eye. Microscopes are used to magnify small objects, so here you will use a compound light microscope 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 by writing the letter in the appropriate box. (6 points) a. Stage: Platform where a slide is placed. B b. Eye piece: Lens at the top of the microscope that the user looks through. This lens most commonly magnifies a sample by 10x. A c. Coarse focus knob: Large knob that moves the stage up and down to focus the sample.