The Plant Kingdom: The Study of The Stem

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Age

6-9.

Materials


Preparation

Observation of real stems and their types
Nomenclature of the stem

Presentation

Chart 7

THE PISTON PUMP

  1. Water will naturally go from an area of greater water content, to an area of less water content.
  2. It will naturally equalize its own pressure.



Experiment 6

ASCENT OF LIQUIDS IN THE PLANT

MATERIALS: Flower with stem cut during the experiment, glass jar
with a wide mouth, red dye or food coloring.

  1. Fill the jar 3/4ths full of water and color it with a little dye.
  2. Then freshly cut the flower and stem from the plant, immediately placing it in the colored water.
  3. Then immediately cut the stem again while under the water.
  4. Observe what happens and write your observations.


Experiment 7a

ASCENT OF LIQUIDS IN THE PLANT

MATERIALS: A well developed corn plant or another plant still growing in the ground, a sharp knife.

  1. Cut the stem of the plant.
  2. Observe what happens and write your observations.


Experiment 7b

CAPILLARITY

MATERIALS: 3 glass tubes of different thicknesses, one of which is a capillary tube, a pitcher of water, red dye or food coloring, an eye dropper, a small glass container.

  1. Fill the glass container with water, 3/4ths. full.
  2. With an eye dropper, put a drop of red dye in the water and then immerse the three tubes.
  3. Observe what happens and write your observations.


Experiment 8

FORMATION OF WATER VAPOR

MATERIALS: A flower pot containing a plant with many green leaves, a large transparent plastic bag, a piece of ribbon, a watering can and water.

  1. First water the plant in the flower pot.
  2. Then cover the green parts of the plant with a bag and tie the bag around the bottom of the stem.
  3. Tie it tightly so that on air can enter.
  4. Then place the plant in the light but not the sun.
  5. Observe the plant after 24 hours and thereafter.
  6. Keep the soil well watered.
  7. Observe what happens and write your observations.


Chart 8

THE SUN'S DRINK

  1. The liquids in a plant automatically proceed to the top of the plant.
  2. The full plant seeks out the light since the light is what enables the plant to produce nourishment.


Experiment 9

WATER IS NECESSARY TO THE PLANT

MATERIALS: 3 test tubes, water, oil, three small plants, test tube rack.

  1. Put the water and one plant in one test tube.
  2. In another test tube put the oil and a plant.
  3. In the third test tube put only a plant.
  4. Observe what happens and write your observations.


Control Of Error


Points Of Interest


Purpose


Variation


Links


Handouts/Attachments