7TH GRADE SCIENCE

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QUIZZES CHAPTER 2 7thgrade
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soil lab

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Cells Alive- Internet Lesson

URL: www.cellsalive.com

Objective: You will look at computer models of cells, learn the functions and the descriptions of the cells and their components.

Navigating the site: Cells.alive has a navigation bar at the left. After accessing the page, click on CELL BIOLOGY on the leftside navigation bar. From here, you will access the links: "How Big is a..", the animal cell model, the plant cell model, and the bacterial cell model.

Part A. "HOW BIG IS A...."

Here you will look at objects found on the head of a pin. Your job is to rank them in order of size on the chart below and estimate the length of each (in nanometers, micrometers, or millimeters). The line in the bottom right corner of the screen is used to help you estimate. Sketch each of the objects.

 
Object
Sketch
Size in nanometers, micrometers or millilmeters
Human hair

 

 

Dust Mite

 

 

Red Blood Cells

 

 

E. coli

 

 

Staphylococcus

 

 

Ebola virus

 

 

Rhinovirus

 

 

Part B: Bacterial Cell Model - (you will need to return to the "Cell Biology" link to access this page, or hit your back button)

Part C; Animal Cell Model - (you will need to return to the "Cell Biology" link to access this page, or hit your back button)

For this model, you will need to click on the various parts of the cell to go to a screen that tells you about the parts. Answers to the following questions are found there.

 

1. What do mitochondria do?

 

2. How big are mitochondria?

 

3. What does the Golgi Apparatus do?

 

4. What is the difference between smooth and rough ER?

 

5. Where is the nucleolus found?

 

6. What does the nucleolus do?

 

7. What does the cytoskeleton do?

 

8. Cytosol goes by what other name?

 

9. What is the function of the cytosol?

 

10. What is the function of the lysosome?

 

Sketch each of the following.

Mitochondria

 

 

 

 

Lysosome

 

 

 

 

Golgi Apparatus

 

 

 

 

Rough ER

 

 

 

 

Part D: Plant Cell Model - (you will need to return to the "Cell Biology" link to access this page, or hit your back button)

 

1. What other type of cell has a cell wall?

 

2. What makes the plant cells green?

 

3. In plant cells, what does the vacuole do?

 

Sketch the following

Chloroplast

 

 

 

Vacuole

 

 

 

Part E: Overview

For the chart below, place a check in the box if the cell has that component.

 
Plant
Animal
Bacteria
Chloroplast
Vacuole
Ribosome
Mitochondria
DNA
Endoplasmic Reticulum
Cell Wall
Golgi Apparatus

 

metamorphic rocks click here

virtual fossil lab

click to see clam pictures