Romantic writers saw in the landscape around them the manifestation of his own mood.
The truth is that at this age the spirit can only be good (who pinched by your 15 years, guys ... CARPE DIEM, TEMPUS FUGIT that ...) but it is true that the landscape and the experiences of last Thursday can not but take comfort and draw a smile.
On the other hand, there is nothing motivating and producing more pleasure than the knowledge itself and its application in real situations. Human beings are complex and it is his thirst for knowledge (inherent to self "I think therefore I am"), which develop their potential to the absolute limits.
And, roughly, this is what we live on Thursday, positivity and joy + know-how; the perfect formula for the achievement of meaningful learning and group cohesion.
We had great time. For the hydrology study should be moved to the valley, to the Dove Creek. The trip was easy on the way, and complicated (rather steep) around, and we decided to address by urbanization El Mirador, whose slopes have left an indelible mark on our twins ...
The rock rose, cherry, chestnut and even strawberries, along with thousands of wild flowers made our journey more enjoyable. Upon arrival
chosen for the sampling and measurement, transport between all the material and are distributed in working groups.
Before beginning practical work, Sonia (expedition leader), recalled all worked at a theoretical level in the classroom and correctly explained the protocols and standards. The activities took place smoothly and none of us resist wore the captain's suit Pescanova ... Some brave and decided to take a bath!
In short, it was a different day that served to learn more about our immediate environment, because only from his deep knowledge can arise respect and conservatism necessary for the survival of our planet.
'll leave you with a description of the hydrology protocols and some pictures taken during their implementation.
Text: Carolina Moran (Professor of Language and Literature).
Recognition of the "Study Area"
- Search accesses. Permits
- Hall.
- test tools. Decision
- study sites.
Preparation of materials and explanation of the "Protocols" to be performed:
The head of Hydrology, Sonia, gives explanations for everything that is going to do in the Protocol of Hydrology.
study site location through photographs:
- take pictures of the study area to each cardinal point.
- compass is used for maximum accuracy.
- are taken, beginning with the North, in the sense of clockwise (NESW).
Making a picture of the area, using the art teacher:
Calculating the width of the water depth and height of trees: Using
- the Clinometer (built by other students of ESO).
- distinguish its use for the calculation of heights or lengths to calculate.
Management
Manga collection of species "of the water layer:
is usually collected invertebrates (insects, larvae of all kinds etc.) that are difficult to recognize. You can also pick vertebrates (tadpoles, young newt, fish, etc.).
Water Temperature Protocol:
Temperature is another important physical quantity in the development of the various phenomena that take place within the water. The solubility of gases and salts is related to temperature, at temperatures less solubility of oxygen, thus increasing demand, while increasing the solubility of salts in general.
To measure water temperature using a thermometer that is kept in water for 10 minutes. The reading is done without removing the water.
The drinking water temperature should be between 10 º and 14 º C. For aquatic life
temperature can not exceed 34 º C at any time during the months of May to November, or 23 º C in the months from December to April.
Irrigation water should not present a temperature above 35 º C.
Procedure: Ata
- very end of the thermometer to the wrist to keep the thermometer in case it falls into the water by "accident." Subject
- end of the thermometer and shake several times to remove any remaining air. Record the temperature reading.
- Dip the thermometer at a depth of 10 cm in the sample of water for a few minutes.
- Try to take the reading as the bulb of the thermometer is still in the water.
- it again if the temperature has not changed, record the temperature along with the time and date on your worksheet.
- Calculate the average of the measured temperatures for all groups.
Protocol water sampling and data collection of color and odor:
Collection of water sample
- Hold the rope and lower the bucket to stop is filled partially with water. When some water entered the bucket, pick it up and stirring the water for cleaning. Discard this water and repeat the procedure nuevamente.Si the site of sampling is a stream, toss the bucket to a very mixed area, a short distance from the shore.
- For a sample, let the bucket to fill with 2 / 3 to 3 / 4 of it. Then pull it and pull it out of the water.
Technical
bottle samples
- One jar will put the name of our center, the name of teacher who made the collection, site name, date and time in which the sample is collected.
- Rinse the bottle and cap with sample water.
- Fill the jar with water from the sample until it is spread over the neck, so to cover it, there is no air trapped inside. Sella
- the top of the bottle with tape. Color
The water has a key dependent variable in many different circumstances. The color in natural waters, which should be colorless, it is of metal salts, organic matter, and the concentration present in dissolved or suspended. The color of the water can also be due to external causes such as the absorption of radiation of longer wavelength.
in a water sample to distinguish between two kinds of colors: the apparent, which is the color that presents the raw water, and the real, which is the color that shows the water once it has been removed suspended matter. Odor
From a physiological standpoint, the senses of taste and smell are closely linked, since the taste buds and olfactory organs detect stimuli simultaneous and complementary.
The presence in water of chemicals, organic matter or decomposing bodies, is due to different odors. Certain living organisms such as algae, fungi, fish deshueve, etc., cause unpleasant odors.
There are only four basic tastes: sour, salty, sweet and bitter. Other flavors are only apparent and owe their existence to the fact mix flavors and smells.
To appreciate the smell of water filling a 1 liter bottle in half, close and shake gently. This will perceive the odor of the water.
To determine the taste must be taken into account the temperature, because temperature above 14 º C is no longer taste sweet. By the taste you can determine the presence of iron and other elements directly.
waters unfit for drinking should be odorless and tasteless. Only
you must test those waters that offer guarantees, are colorless and odorless.
Protocol water Turbidity:
Transparency of water is in relation to the proportion of dissolved solids in it. We usually talk of turbidity or transparency.
The transparency of water is usually stated as the depth of vision that allows, which is measured by turbidity or Secchi disk.
The Secchi disk is a white or black and white, 20 to 30 cm in diameter, which is immersed in water to a depth that is not observed. The depth to which we can see, is related to the transparency of the water. Following
to turbidity can be distinguished:
- clear waters. Are those in which light penetration is great, and in shallow water must be the bottom.
- Water clarity
- media. Are those in which light penetration is relatively low, and if it is rarely seen deep sea bottom. Colors are usually dark brown and classified as wetlands.
- Troubled Waters. Are those in which light penetrates is very small, to the point where the bottom is not visible. They usually have a milky gray or brown and found on alluvial soils, fine textured or eroded, if the cause of turbidity is natural.
Secchi Disc Procedure:
- Send down the disc gently into the water until it disappears.
- Brand, with the highest accuracy in the rope, the point at which the disk disappears.
Turbidity Tube Procedure:
- Place the tube so that the sun at your back.
- Pour the water sample into the tube until the image of the base of the tube is no longer visible if you look straight through the water.
- Add this depth value on your worksheet. Make
- measurement three times alternating with peers in your group.
Water pH Protocol:
The pH of the water study is to determine whether water is acidic, neutral or basic, and consequently whether there may be high or low concentrations of various elements and and if possible the presence of aquatic life.
The normal range of water pH is between 4 and 9.
for the existence of aquatic life should not show pH values \u200b\u200bbelow 5 is not greater than 9 on an average day, preferably should be between 6.5 and 8.5.
drinking water should have a pH between 7 and 8.5 but will tolerate values \u200b\u200bfrom 6.5 to 9.5.
pH level of water quality less than 5.5
Poor: Very acidic. A fish and other organisms will be almost impossible to survive
5.5 to 5.9 Acceptable
6.0 to 6.4 Good
6.5 to 7.5 Excellent
7.6 to 8.0 Good
8, from 1 to 8.5
More than 8.6 Acceptable Poor: Very basic. A fish and other organisms may be almost impossible to survive.
Tape Procedure pH indicator
- Rinse beaker with sample water at least twice.
- Fill glass halfway with water to be measured. Moja
- paper tape indicator in the sample water and leave it submerged for 20 seconds.
- water Remove the tape and compare the color obtained with the box of pH indicator strip.
- Without reading is clearly records the pH in your worksheet.
Procedure pen or pH meter
- Rinse the electrode and surrounding parts with distilled water. Dry with some paper.
- Fill a beaker and dry clean 100 ml to 50 ml water sample.
- Dip the electrode into the water. Make sure everything the electrode is sunk.
- Shake the mixture slightly and let the value of the display stabilizes.
- Once stabilized the figure, read the pH value and record it in your worksheet. Repeat
- measurement again following all the steps. The two values \u200b\u200bmust match within 0.2.
NOTE:
The readings obtained with the pH meter may not be accurate if the water sample has a conductivity level less than 100 microSiemens / cm, since these instruments do not work properly below this level.
Water Conductivity Protocol:
The electrical conductivity of a water sample is a measure of its ability to conduct electrical current. The larger the number of impurities in the water, the greater its conductivity.
Procedure:
- Uncover the meter and press the on / off to switch on.
- Rinse the electrode with distilled water and dry.
- Fill a beaker of 100 ml dry clean water to be tested.
- Dip the electrode into the water sample.
- Gently shake the sample for a few seconds and then allowed to stabilize the value displayed on the screen. Lee
- value and record it on the worksheet.
- Calculate the average of all values \u200b\u200bobtained, discarding those that are not within 40 micro / Siemens average.
Here we leave you with photos of the living and the beautiful day "field and water"
assessment by teachers and students can get a sense of great satisfaction and success throughout the entire business, from the work and lived lovely picnic.
expedition leader: Sonia Lechuga (Professor Physics and Chemistry).
Organization of activity: Sonia Lechuga, David Rosa and Ignacio Twin. Support
Math: Azahara Lopez and Veronica Knight.
Photo: M ª Carmen Bango (Professor of Plastic and Visual Education).
distribution and arrangement of photographs: Azahara Lopez (Professor of Mathematics). Creating
blog: David Rosa, Sonia Lechuga, Azahara Lopez and Carolina Moran.
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