What is the pH number of each liquid?

Objective: To determine the pH number of the different liquids and to classify the liquids as acids or bases.

Materials: (per group)
·Sheet of white paper
·Test tray
·10 liquids with droppers
·pH paper
·pH chart

Procedure:
1.Make your pH predictions for the 10 liquids listed in the table below.
2.Collect materials for your group.
3.Place the white sheet of paper under your test tray.
4.Place a small piece of pH paper in 10 individual cups of the test tray.
5.Place 1 drop of liquid #1 in the first cup of the test tray. Record the pH of the liquid, using the pH chart, in your data table.
6.Repeat step 5 for each of the remaining liquids.
7.Once you have tested each liquid, complete the data table by identifying the liquid and answering whether or not your pH prediction was correct.

You will be testing the following liquids:
vinegar, pop, water, hydrochloric acid, ammonia, bleach, dish washing detergent, milk, lemon juice, antacid

Make a chart listing the liquids you are testing and write your pH prediction for each of the liquids


DATA TABLE
The substances you are testing are only labeled as numbers. You will not know the identity of each liquid until you have found their pH. Once you have determined the pH of each substance, use your textbook to help you identify the liquids. Label each as an acid, base or neutral by placing the liquid names in the appropriate place of the pH scale.

Unknown liquid pH of liquid Identity of liquid Was your prediction correct?
#1
#2
#3
#4
#5
#6
#7
#8
#9
#10

Conclusion:
1.How many of your predictions were correct?

2.How did you make your predictions? How did you know if they were an acid or base to begin with?

Observing Plant Cells

Elodea Leaf

1. Add a drop of water to a glass slide.
2. Remove a leaf from an elodea plant and place it in the drop of water. Place a coverslip on the leaf.
3. Observe the leaf under low power, then medium, then high power.
4. Make a drawing of an Elodea cell on a separate sheet of paper.
5. Label the following parts in your drawing: cell wall, cell membrane, nucleus, chloroplasts.

Discovering Mitosis

Materials
Paper Plates
Colored Pipe Cleaners
Masking Tape

Procedure
1.Get 2 paper plates and a set of 3 pairs of pipe cleaners.

2.Place the 2 paper plates on top of each other. Scramble the 6 pipe cleaners so that the colors are all mixed. Place them on the paper plates. Draw this on a separate sheet of paper and label it Figure A.

3.Separate the strands according to color. Twist 2 of the same color pipe cleaners
around each other one time in the middle. Place each pair on the paper plates.
Draw this and label it Figure B.

4.Line up the pairs of pipe cleaners along the middle of the paper plate. Draw this and label it Figure C.

5.Separate the 2 paper plates and move them partially apart. Also, separate each pipe cleaner and move 1 of each color to opposite ends of the 2 plates. Draw this
and label it Figure D.

6.Scramble the pipe cleaners on each of the plates. Separate the paper plates even
further. Draw this and label it Figure E.

7.Completely separate the paper plates. Draw this and label it Figure F.

Critical Thinking & Application

1.Label each stage of the cell cycle for Figures A-F.

2.Each of the letters A through F represent a stage in the life of a cell. What do you see happening to the cell from the 1st stage through the 6th stage?

3.The colored pipe cleaners represent genetic material in the cell. How does this
genetic material appear in the cell in stage A?

4.What happens to the strands of genetic material in stages B and C?

5.What has happened to the strands of material by the time they reach stage D?

6.Describe the genetic material inside each of the circles in stage F. What do these
circles represent? How does the genetic material in the 2 circles compare?