WEEK 6 (27/05/15)

Very high condensation, we can barely see the interior of the tank. 

Plants are growing without problems but some are a bit fallen maybe because of humidity. 

Flowers look a bit bad, this can be due to humidity or because they may be dying. 

Non-fertilized soil is as deserted as it was at the beginning and water is maintaining a constant level; that means te water cycle completes himself even if water doesn’t filtrate from soil.  There are some curious facts like that where there are more plants, water condensates more in the glass and that even if flowers are dying, other plants are growing without problems (this can be due to the usual habitat where these flowers are).

PLANT	AVERAGE GROWN
Flowers (fertilized soil)	5, 71 cm
Lentils (fertilized soil)	14, 14 cm
Lentils (normal soil)	0 cm
Prasley (mixed soil)	6, 78 cm

In this last week, both CO₂ and O₂ have grown. 

CO₂ passed from 10022 ppm (0,01%) to 100200 ppm (0,1%) which, even if it looks like a very little change, means a great increase. O₂ in his case had a 0, 47% and increased to 0, 53% which is also a big change. But they are many possible errors about this because those gases could go in and out because of a bad hermetic closing or maybe when we introduced the measurers.

Apart from that temperature reached 27,6ºC.  

WEEK 5 (20/05/15)

Plants keep growing and water doesn’t decreases too much, very similar to the last week. The plants start looking for light, especially parsley, so they move to the window. No changes for the non-fertilized soil part where nothing grows.

PLANT	AVERAGE GROWN
Flowers (fertilized soil)	5, 42 cm
Lentils (fertilized soil)	13, 07 cm
Lentils (normal soil)	0 cm
Prasley (mixed soil)	5, 57 cm

Oxygen this time increased back to 0, 47% which means an increase of 3% but the quantity of CO₂ maintains at 0,01% (10022 ppm). The temperature this time stayed at 28ºC.

The fact that oxygen quantity changes but we observe no changes on the CO₂ percentage makes us think we maybe did something wrong, probably when we were calculating the oxygen, CO2 and temperature, and we had to open the tank slightly.

WEEK 4 (13/05/15)

The three types of plants have grown at least a little bit, that means everything is working but the part where soil wasn’t fertilized, nothing grows there. The water is creating a lot of condensation and the little pool decreases very slowly, which means they could survive with that amount of water for a long time.

PLANT	AVERAGE GROWN
Flowers (fertilized soil)	3,31 cm
Lentils (fertilized soil)	11,14 cm
Lentils (normal soil)	0 cm
Prasley (mixed soil)	3,78 cm

Oxygen had decreased a 0, 06% since last time which is very few and give us a 0, 44% but CO₂ stays at  10018 ppm (0,01%), no changes. Finnally, temperature increased to 28ºC (+2º).

Top view

Front view

WEEK 3 (06/05/15)

Flowers continue growing at a regular velocity, lentils have started to grow in the fertilized soil part but there is still nothing in the normal soil. Parsley is in the same state than the last day. The water continues condensating and there is still water in the tank.

VARIABLES:

Independent: Those that we voluntarily decided to alter; in this case we would say that we mean the product of the mass by increasing / temperature variation.

Dependents: are those who will be affected depending on how we treat the independent variable, so this will be the product of the time and power by.

Subsidiaries: Those that remains constant so as not to unduly affect the way in which the independent variable affects the dependent. Then we say that in this case will be the way of measuring the temperature in the experiment, the heater power, the time spent and finally the initial temperature.

Oxygen	0, 50%
CO2	10018 ppm
Temperature	26ºC

Growing average of plants (0.2cm margin of error)

PLANT	AVERAGE GROWN
Flowers (fertilized soil)	3, 58 cm
Lentils (fertilized soil)	1 cm
Lentils (normal soil)	0 cm
Prasley (mixed soil)	0 cm

Flowers & Lentils

Parsley & Flowers

Thermometer

WEEK 2 (04/05/15)

We looked at how the plants were growing and if there were any problem. 
We observed that the flowers started growing but the both lentils and parsley hadn't started to grow yet. 
This may be due to the type of soil, in the flower’s part, there was fertilizer and abundant water but the other the soil had less fertilizer and less water access. 


Apart from that, the water condensates slowly so I think we are doing it well, water doesn’t totally evaporates and the fact that the lentils and parsley have not grown yet can be because they grow slower than the flowers.

Since there wasn't much to calculate here we didn't do the part of collecting data on CO2 and Oxygen levels, nor humidity, because the plants hadn't really grown much.

front view (flowers)

top view (light)

WEEK 1 (29/04/15)

At the start of the new project we filled back the tank but this time with a mixture of normal soil and fertilized soil. There wasn't enough normal soil so we didn't do half and half as we originally planned. The tank was divided in 3 equal parts, lentils, flowers and parsley. Supposedly each section was going to have half fertilized soil and half normal soil, but in the end only the lentils had half fertilized soil and half normal soil, the other had half fertilized soil and half mixture of fertilized and normal. We put the water in a lateral of the tank for it to create a separation between the three types of plants that we are going to study.

Parsley Lentils

Flowers

START OF THE NEW PROJECT

We restarted the experiment due to a fail with the snails that caused their death, plants didn’t grow and snails didn’t have food. The fact that the plants had grown slower this time may be caused by the type of soil becausse in this try, the soil wasn't fertilized.

Because of this problem, all snails died... or not:

Here we can see the survival of the fittest

We had a problem with bringing in the snails too soon since we couldn't keep them anywhere else. The soil we used that time wasn't fertilized so the plants weren't able to grow properly. The snails were kept inside the tank with the ungrown plants, they had air holes until the plants would grow but when nothing flourished, the snails died because they didn't have any food. In the end onl one of the snails survived and we decided to go back to the original project.