The Plant Kingdom: Relationships in The Plant Environment

Age
6-9.

Preparation
Repeat Exp. 15: action of lights on plants.

Presentation
Experiment 16

ACTION OF HEAT ON PLANTS

MATERIALS: 2 small plates, cotton wadding, radish seeds, water, a glass.


 * 1) Put quite a few radish seeds in a glass with water and leave it for 24 hours.
 * 2) Pour out the water and then take the two plates and cover them with the cotton.
 * 3) Scatter the soaked radish seeds on top of the cotton and water both plates well.
 * 4) Leave one plate in the classroom and put the other in a refrigerator.
 * 5) Keep both well watered.
 * 6) Observe them each day and write up your observations.

Experiment 17

ROOTS ALWAYS GROW DOWNWARDS, AND THE STEM?

MATERIALS: A glass, ink-blotter paper, black construction paper, a rubber band, sand, bean seeds, water.


 * 1) Cut the ink blotter paper to fit around the inside of the glass.
 * 2) Place the bean seeds between the blotter paper and the sides of the glass making sure they are positioned differently.
 * 3) Then fill the glass with sand and wet sand.
 * 4) Cut the black construction paper large enough to wrap around the outside of the glass, holding it in place with a rubber band.
 * 5) The sand must be kept wet.
 * 6) Do the same using other seeds.
 * 7) Observe your glass every day.
 * 8) Observe what happens and write your observations.

Experiment 18

ROOTS ARE SENSITIVE TO WATER

MATERIALS: a clear container, wide and straight-sided, radish or bean seeds, soft soil, a watering can and water.


 * 1) Fill the glass container with the loose soil.
 * 2) Plant the seeds in the soil close to the glass sides and water the soil well where the seeds were sown.
 * 3) After the roots have developed well in depth, begin to water increasingly farther away from the plants.
 * 4) Observe the container every day and write your observations.