Water pollution

Introduction:

Last day we made an experience. That consists in checking if soya seeds can grow with polluted water.


Procedure:

To do the experience, we prepared different solutions with polluting substances(NaOH, NH3, NaCL). Each grup had one polluting substance and 4 petri sheet: in one of this, there was distilled water, in other, there was a solution with 0.1M of concentration, in other, there was another solution with 0.01M of concentration, and in the last one there was 1M. Next, we put some cotton wool in each petri sheet, 10 soya seeds, and the corresponding solution. We close the petri sheets.


Results:

Water pollution

Introduction:

Last tuesday we make a new experience that consist in watch how grow the seed with contaminated water.

Procedure:

Take 10 ml. of the polluting solution and put them in a 100 ml tes-tube.

Fill it with distilled water up to 100 ml.

Pour this solution into a mew Erlenmeyer labeled ''polluting 0.1''.

Take 10 ml of the ''polluting 0.1'' solution and put them in a 100 ml test-tube.

Fill the test-tube with distilled water up to 100 ml.

Pour this solution into a new Erlenmeyer labeled ''polluting 0.01''.

Take 10 ml of the ''polluting 0.01'' solution and put them into a 100 ml test-tube.

Soap with recycled oil

Procedure:

1. Put 25 ml. of oil in one erlenmeyer and add 10 ml. of water.

2. Weigh 4'5ml. of NaOH and put in a new erlenmeyer.

3. Put some detergent to bring forward the process.

4. Mix the substance.

5. Put the substance in a mould.

6.Watch the results.

Objective:

Our objective is recycle the oil giving them a new use, because the oil is a very pollution element.

Micro-climates

WORKSHEET 6

Micro-climates in the city:

Last tuesday we mesured various atmospheric phenomenon, like the wind speed, the temperature, the humidity, etc.

We use a thermometer to mesure the temperature, the anemometer to mesure the wind speed, the hygrometer to mesure the relative humidity.

Conclusion:

The differences among the different places aren't very big. The temperature of the air next to the floor is higher than the temperature two metres from the floor because the material of the floor attracts the heat during all the day.

Ecological footprint

WORKSHEET 9

OUR ECOLOGICAL FOOTPRINT

XAVI'S ECOLOGICAL FOOTPRINT

475 dam2 = 475.000.000 cm2 = 2761627 ft

EVA'S ECOLOGICAL FOOTPRINT

535 dam2 = 535.000.000 cm2 = 2912357 ft

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Today we calculate our ecological footprint. We make a test that we found in a web. At the end, we calculated the number of footprints that we need in our daily activities.

[http://www.stanleyparkecology.ca/programs/activities/howbigft.php]

THINGS TO REDUCE OUR ECOLOGICAL FOOTPRINT

-Swich off the lights when we don't need it.

-When there is sun, we open the windows and turn off the lights.

-Recycle the brush.

-Recycle the paper.

-Turn off the water.

-When it is possible, go by public transport and not by car.

-Use second hand clothes.

Mobility and ways of transport

WORKSHEET 5

Last Tuesday we make an experience. We count the pedestrians and the vehicles that cross in our front during five minutes.

Questions:

-Write a short conclusion with the results you've got:

Results:

●The difference of cars between the three streets is very big, because in Casp there were 8 cars, in Gran via there were 224 and in Pau Claris there were 105.

●The difference of buses between the three streets isn't big, because in Casp there were 2 buses, in Gran via there were 5, and in Pau Claris there were 3.

●The difference of motorbikes between the three streets is big, because in Casp there were 5 motorbikes and in Pau Claris 90.

●The number of bikes in the three streets was similar. In Casp there was 1 bike, in Gran Via there were 11, and in Pau Claris there were 2 bikes.

●The number of pedestrians in the three streets was similar. In Casp there were 95 pedestrians, in Gran Via there were 103, and in Pau

Claris there were 111 pedestrians.

Conclusion:

We think that the difference of cars it is related with the room for cars and what is destinated the street for (shops, cars, pedestrians...) For example Pau Claris is destinated to cars (because it goes to the sea, to another suburb) and Casp is more comercial that's why there are more pedestrians than cars.

MOBILITY AND WAYS OF TRANSPORT

WORKSHEET 4

Last tuesday we made an experience, it was about the mobility and the ways of transport. We calculated the street width and the sidewalk width of three streets around our school, and these are the average of all the results:

We calculated the width of the street and of the sidewalk mesuring our footsteps and calculate the number of steps.

This is the conclusion:

Gran Via is the most wide street. Casp and Pau Claris are similar. The most narrow sidewalk is in Pau Claris because is a street for cars.

Photo of Gran Via