Testing Plant Growth

I Was Absent for Part of It Including the Video.

Independent Variable

• Plant seeds in different kinds of soil (e.g. potting in soil, perlite, sand etc.)

Dependent Variable

• Measure heights of each plant at certain checkpoints.

Evidence

• We can record our data using measurements (in cm).

Questions

Answers

1. Name your Control Variables (What will stay the same for each of the three cups)?
2. Name the Independent Variable (What is it that is different for each of the three cups)?
3. Name your Dependent Variable (What is it that you are testing & recording data on?)
4. What data are you collecting to serve as Evidence to show how plants grow in organic material versus inorganic planting material?
5. Why is everyone starting with the same three cups? Why do we need to test so many plants?
6. What sprouts first in a seed: the stem or the root?
7. How do you know? How do the pictures below help explain your answer for #6?
8. Why do you think it goes in that order?

1. The place the jars are in, the jar that the plant is in, the amount of water it gets, the soil that the seedling has been planted in and the amount of Sunlight each one gets.
2. Well the soil type is different for all of the cups.
3. We are measuring the plants.
4. We are measuring the heights of the plant in inches for all of the different soil  types.
5. So that we can make sure all of our data is correct by checking all of them. So if one thing is strange then we will know it is all because of the different types of soil.
6. The root because water is the "activator" to tell the plant to start growing, and the root is the thing that gathers the water.
7. The first picture has it where the thing coming out is white not green. (Roots are white) And in one of the other ones the thing is all squiggly and stems usually stick straight up to find the Sunlight in the shortest time possible. 
8. I think it goes in that order because the root finds the water which is what activates the plant to start growing. So it pretty much just needs water before sunlight.