Ron and Mia want to grow vegetables in a planter.
They can fill the planter with either sandy soil (sand) or clay soil (clay).
Ronen and Maya want to know which soil would require less watering of their vegetables.
To find out, they conducted an experiment in which they determined which soil enables water to permeate slower.
To watch the experiment conducted by Ron and Mia, click on Run experiment in the simulation.
1.
What was the objective of Ron and Mia's experiment?
2.
Which of the following conditions (factors) were identical in the two experiment vessels, and which conditions were different?
Drag the words from the wordbank to their appropriate places in the table:
3.
The condition (factor) whose effect is studied in the experiment is:
4.
Why was it important that the students maintain identical conditions in the experiment?
Because they did not want to test too many conditions for fear of getting confused.
Because they were not sure if it was advisable to test four conditions at once.
Because they didn't notice that they were focusing on only one condition.
Because they wanted to be sure that the different condition is the one that has the effect
5.
Explain why it is important that only one condition in the experiment be different:
6.
In the experiment you observed, Mia and Ron measured the quantity of the water using a graduated cylinder.
Why do you think Ron and Mia chose to measure the water in a graduated cylinder?
Because the graduated cylinder is a vessel used for testing soils.
Because the graduated cylinder is a vessel used for measuring the quantity of liquids.
Because the graduated cylinder is a vessel used for measuring substances in all three states of matter.
There is no special reason. The quantity of water could be measured using any other vessel.
7.
Experiment Results
Run the experiment again and record the results obtained:
a.
Quantity of water accumulated at the end of the experiment in graduated cylinder A: cc.
b.
Quantity of water accumulated at the end of the experiment in graduated cylinder B: cc.
8.
Conclusions
Write a conclusion that stems from the experiment results:
9.
Dan and Jane, Ron and Mia's friends, also want to grow vegetables.
They, too, believe it is important to know which soil retains more water: Sandy soil or clay soil.
Must Dan and Jan repeat the experiment as well?
Yes, because the rate at which water permeates through the soil depends also on the type of planter.
Yes, because the experiments results depend also on the person conducting the experiment.
Yes, because different result can be obtained for any experiment, under the same conditions.
No, because similar results will be obtained for any experiment, under the same conditions.
10.
Clay soil and sandy soil differ in one other property:
The grains of the clay adhere to one another when they are wet, and the water then has a hard time permeating through it.
On the other hand, the granules of the sandy soil do not adhere to one another.
When soil is hoed, its grains are moved and separated from each other.
According to this information and based on the results obtained in the experiment, what should be done?
