Lab #10 – The Celery Experiment

Lab #9 – The Celery Experiment

Problem

How does a plant get water from its roots to its leaves?  Are all of the cells and tissues in a plant the same, or are there differences?

Hypothesis 

Materials

Celery

Celery seeds

Food coloring

Water

Plastic cup

Scissors

Ruler

Hand lens

  

Procedure

 1.          Make observations of your celery seeds in the Results.

2.          Make observations of your celery stalk in the Results.

3.          Cut about 2.5 cm off the bottom of the celery stalk and make observations on the celery stalk’s cross section.

4.          Fill up a plastic cup with 250 ml of water and add two drops of food coloring.  Put your celery stalk, cross section down and leaves up, into the cup of colored water. 

5.          Make observations on your celery stalk experiment.  Make sure to include color and other details such as height, number of leaves, width of cross section, etc.

  

Results

1A                                                                            1B

Observations on the celery seed	Observations on the celery seed magnified

2A                                                                            2B

Observations on the celery stalk	Observations on the celery stalk magnified

3A                                                                             3B

Observations on the celery stalk’s cross section	Observations on the celery stalk’s cross section magnified

4A                                                                            4B

Observations on the celery stalk in colored water	Observations on the celery stalk in colored water magnified

5A                                                                            5B

Observations on the green onion	Observations on the green onion magnified

Analysis

1) Observe: What happened to your celery stalk overnight?

2) How do you know that the water reached the top of the plant?  Cite your evidence.   

3) Look for small circles at the bottom of the stalk that are the color of the food coloring you used. (These circles are xylem, the tubes that carry water up the plant.) Draw pictures and make observations about the xylem in your celery.
4) Infer: What happened to the xylem?  
5) Review: How does a plant get water from its roots to the rest of the plant?
6) Are all of the cells and tissues in a plant the same, or are there differences?  Where is your evidence?

Observations on the celery stalk in colored water

Conclusion

Organization of an Organism Project

Organization of an Organism Project

:

Score	Criteria
4	You have labeled and spelled correctly: cell, tissue, organ, organ system, organism; you showed creativity; your arrows are appropriately placed.  Your descriptions are accurate, and the picture is relevant.
3	You have labeled and spelled most of the following terms correctly: cell, tissue, organ, organ system, organism; you showed creativity; most of your arrows are appropriately placed.  Your descriptions are accurate, and the picture is relevant.
2	You have labeled and spelled some of the following terms correctly: cell, tissue, organ, organ system, organism; you showed little creativity; some of your arrows are appropriately placed.  Your descriptions are mostly accurate, and the picture is relevant.
1	You are missing most of the following terms and none are spelled correctly: cell, tissue, organ, organ system, organism; you showed no creativity; you drew no arrows.  Your descriptions are somewhat accurate, and the picture is somewhat relevant.
0	You turned in nothing!

Lab #8 – The Cell and its Organelles

Lab #8 – The Cell and its Organelles

Problem

How are plant cells and animal cells both similar and different?

Hypothesis

Materials

3 zip-loc bags

various slime ingredients

Procedure 

Animal Cell

1. Pour the slime mixture (cytoplasm) into the plastic bag (cell membrane). 
2. Add the  styrofoam sphere (nucleus) and  the clay pieces, plastic squares and pasta (organelles), but not ANY GREEN!

Plant Cell

1. Pour the slime mixture (cytoplasm) into the plastic bag (cell membrane).
2. Add the styrofoam sphere (nucleus) and  various clay pieces and pasta (organelles), including the green clay/squares (chloroplasts).
3. Put the plastic bag cell into another plastic bag (cell wall).

Results

Animal Cell	Plant Cell

  

Analysis

1. Compare/Contrast your plant and animal cells.

2. Predict what would happen to a plant cell if it were to lose its chloroplasts.

3. Explain the importance of the nucleus in both cells.

4.       On your gel cells, what is representing the cell membrane?  How is the cell membrane like your skin?

_____________________________________________

5.     5. What would happen if your cells lost their cytoplasm?  What would the cell look like?

 *Cell Model Project*  Create your own model of an animal and/or a plant cell.  What materials would you use?  Make a list of what is going to represent the following: cytoplasm, cell membrane, nucleus, organelles, cell wall (plant cell only), chloroplasts (plant cell only).

Conclusion

What was your problem?

Restate your hypothesis.  Was it right? wrong?  why or why not?

What did you learn in this lab?

What did you like about this lab?

What were some challenges you had to deal with?

What could you do next with this problem?  What other tests could you perform?

Write down any other additional thoughts, observations, inferences, etc.