Thursday, November 12, 2015

Week 7

Day 7

We observed that there are more little sprouts coming up through the soil. The largest sprout seems to have grown even larger and is still wilted. There is still mold on the surface of the soil, however it does not appear to have grown larger.  
There is one sprout that seams to be growing vertically and looks a lot taller than last week.
The snail that we marked last week has moved. We can see two out three of our snails.
There is still a lot of condensation throughout the terrarium, especially on the top tier. 

The water is still at the same level as the week of 10/15.
The water is pretty clear with just some particles. 
The elodea has grown more and is still very green.

  • The water clarity appears more clear than past weeks
  • The elodea has continued to grow and circle around the bottom tier of the terrarium
  • The snails have moved since last week, and we can see two snails
  • Two of our sprouts have grown quite tall and the smaller sprouths have grown in height also
  • There is a large amount of condensation on both tiers of the terrarium
  • Overall, we have observed a lot of changing conditions in our terrarium. Although during the first few weeks of our terrarium project, we observed a lack of growth, after we added more water to our terrarium we observed rapid growth in our plants, and gradual clarity of our water. 

Thursday, November 5, 2015

Week 6

Our elodea has grown a lot in length during this past week!
It has grown so long that it appears to be circling the inside of the bottom tier. 
There is a lot of condensation throughout the terrarium

There are several new sprouts this week, and we observed that the largest sprout looks a little wilted 


  • The water level is at the same level as measured on 10/15
  • We observed a few new sprouts growing this week
  • We noticed that one of the plant is a little wilted, but that sprout appears to have new growth
  • We observed that there is still mold on the soil
  • The elodea is very green, and has wrapped around the bottom of the ecosystem about 2 1/2 times.
  • We only observed one snail. We have inferred that the two other snails are below the rocks. 
Additional wonderings:
- I wonder if the two snails below the rocks are still living?
-I am curious what has caused the mold in our terrarium? I noticed that the mold appeared the week after we added water, so I am inferring that adding more water to our terrarium is somehow related to the growth of the mold. 

Thursday, October 29, 2015

Week 5

Oh my gosh we have growth!!! WE ARE SO EXCITED!

Here is a picture of our entire terrarium
This is the bottomtier. As you can see, the water appears to be more clear, 
and our elodea seems to be a more vibrant shade of green
Here is a picture of one of our sprouts! When we took our terrarium from the window,
the sprout seemed to be reaching towards the window
In this picture, you can see there is some mold growing on the soil of the top tier

  • We observed a lot of condensation on the top tier of our terrarium
  • We measured the water level to be the same as it was on 10/15
  • After adding some water to our top tier last week, we have observed the growth of 3 sprouts!!
  • We observed some white mold on the soil in our top tier
  • The elodea seems more green
  • We cannot see the snails at all. We are inferring that our snails are below the rocks. 
  • We observed that the water appears to be more clear. There are particles in the water still, but the water doesn't seem to be quite as foggy
  • We observed condensation in the top and bottom tier
Additional wonderings:
-I wonder if the additional water and plant growth in the top tier, contributed to the increased clarity of the water and the growth of the elodea on the bottom tier

Sunday, October 25, 2015

Week 4

Our 2-tiered terrarium has been sitting by the window for 3 weeks now. Our observations are still consistant with our past observations (and are still still a bit sad).

Our aquatic system appears pretty dead. Our elodea has turned a dark brown color and has not grown any longer. 
  • Observations: 
  • There has been no growth in the terrestrial level
  • We observed no growth in the aquatic level (and even observed what appears to be our elodea dying. The elodia has turned dark brown) 
  • All of the snails have moved together! We're not sure if they're dead and someone may have accidently moved our bottle which caused our snails to move, but all of our snails are in different locations than last week! 
  • We observed particles in the water (a little more dirty than last week)
  • We observed very dry soil
  • We can see condensation in the tape that is attaching the two levels
  • We can see condensation on the insides of both levels 
Additional wonderings:
-I'm very curious whether our snails moved on their own (after not moving for several weeks) or if perhaps someone may have accidently caused our snail's movements? 

Thursday, October 15, 2015

Week 3

Today our 2-tired terrarium has been sitting by the window for two weeks

These are our observations:
We observe no growth on the top tier
This is the bottom tier. Our elodea doesn't seem like it has grown, and our snails don't seem like they have moved. 
Here is a picture of our whole 2-tiered terrarium. We noticed that moe condensation has covered the inside of the top tier, and we observed that there is also a fair amount of condensation  in between our masking tape and the outside of the bottle. 

  • We measured 0.5 cm loss of water from the bottom ecosystem 
  • We observed no top seed growth in the soil. Our top tier still lacks roots or seedlings. 
  • Water appears dirty: we observed many floating particles 
  • We observed more particles on the string
  • We observed a leaf floating around bottom tier of our terrarium
  • We can see our 3 snails, however, we are infeering that they maybe dead. We've been trakcing their movement (or lack of movement) and have noticed that they have not moved from last week's position
  • We observed that the soil is very dry 
  • We observed that there is condensation on the bottom and top tiers of our terrarium
Additional observations and wonderings:
- I wonder if there is an organism that could help make our water in the bottem tier more clear again.
- I infer that some of our water loss in the bottom tier is due to the condensation that formed on the bottom tier of our terrarium. 
- I wonder if any of our seeds will be able to grow into plants in our top tier because the soil appears to be too dry to support plant life?

Thursday, October 8, 2015

Week 2

Today, our Ecosystem had been sitting by a window for 1 week.
This is the top tier of our terrarium, there is some condensation 
This is a picture of our whole 2-tiered terrarium.

This is the bottom of our terrarium; so far we observed no growth in our elodea

What we observed
  • There is no plant growth on the top 
  • The water is clear but had visible particles
  • We could no longer see our daphnia 
  • We did observe 3 snails 
  • Our cotton strings had sunk and is fully submerged in the water
  • There is condensation in the soil portion of the bottle
  • The soil in the top tier appears to be a bit dry
Additonal wonderings:
-I'm curious where the daphnia may have gone. If they did die, did they become burried in the rocks?
-We observed that our soil in the top tier is a bit dry. I wonder if our seeds will be able to grow in these conditions?  

Week 1

Today (10/01/2015) we started our Ecosystem in a bottle.
Here is what we put inside:

  • 19cm Elodea 
  • 3 snails
  • 3 cotton strings, about a 12in long each 
  • organic soil
  • 4 daphnia
  • 8 Johnny Jump Up's seeds
  • 1 radish seed
  • 4 Zinnia flower seeds 
  • 600 ml spring water 
  • gravel 

  • This is the bottom of our 2-tiered terrarium (the aquatic level)
    This is the top of our 2-tiered terrarium (the terrestrial level). We put plenty of seeds; I hope we'll be able to see them grow! 
    This is the whole 2-tiered terrarium.
    -Our top 1 liter bottle has soil and flower seeds; this represents our terrestrial system.
    -Our bottom 1 liter bottle is composed of water, rocks, elodia, snails, and daphnia and represents     our aquatic system.

    We put our ecosystem by sunlight and will come back and observe in 1 week.

    Additonal observations & wonderings:
    -I noticed that the water we placed in our system appeared to be very clear. I wonder how our water clarity will look like over time?
    -Although we placed different kinds of animals and plants in our systems, I'm curious how they will survive and grow in our closed ecosystem.