Testing Plant Growth

Independent Variable ​

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

Dependent Variables

• Measure the height of each plant at certain checkpoints.
• _________________________

Evidence ​

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

​Reflection/Synthesis:
Answer the following questions in your blog post. Remember to have at least one follow-up sentence for each question, when possible.

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? How do you know?
7. How do the pictures below prove your answer for #6?
8. Why do you think it goes in that order?
   

​Answers:

1. The place they are in, the kind of jar it is in and how much the are fed.
2. What kind of soil that they are growing in.
3. The plant. 
4. I am using the how tall they are. Mine is 7.1 cm. 
5. So, that we can test multiple to make sure our data is correct. And also if one thing goes wacky then we will know if it is because of the soil.  
6. The root because it needs the water before the sunlight. It needs the water so it won't dehydrate.
7. The first picture has a little thing coming out of it and it look like a root because it is going down, it is white not green, and it is not strait it is squiggly. In the second picture it just looks like it has grown. Then in the Third picture it looks like the leaves are coming from the seed like it looks like it is in the seed. In the forth picture it looks like it is the first picture from another angle. 
8. I think the pictures are in this order because it shows them growing in chronological order. It makes it less confusing.