Production of a temperature organ

Material:

• Metal strip (100cm x 8cm)

• Tape

• Meter staff

• 2 Petri plates

• Thermometers or pyrometers

• Hot water (approx. 60°C)

• Cold water (common salt/ice mixture)

• Flea cancers in appropriate storage container

Execution:

From the metal strip one must make a gutter, masking therefore as the first the edges with tape with the tape that one does not cut oneself. One must attach now a scaling, which we divided into 10 cm of sections. We began however not completely at the edge, but a few centimeter removes, and from this a bending edge made, at which we high-bent the sheet metal. Now said like all 10cm a line, up to the conclusion. Now one bends also the other transverse side, and afterwards the long sides, so that one one run has.

Determine the temperature preference:

In order to determine the temperature preference, one fills the hot water in the one, and the common salt/ice mixture into the other Petri plate. One puts now the Petri plates in such a way that one can put the gutter on it. Next one must wait something, until an even temperature gradient of at least 30°C adjusted itself. (e.g. from 0°C to 30°C) one measures this occasionally again and again with the thermometer, or the pyrometer. If one has even gradients, then one provides a chart, whereby one clears away the distance of the side on the x axis (10cm, 20 cm…). On the y axis one clears away the temperature. For this makes to also still another appropriate table . Now a few flea cancers into the center give the temperature organ. Now every 5 seconds make a cross into the field of the table , which corresponds to the point of view of an animal, attention, per animal one needs its own table ! Now still another draw chart, evaluate and.

From 7 animals 4 animals preferred the colder water (approx. 8 °C), only 2 animals remained in a somewhat warmer range and an animal within the range of 20,4 °C always were.

By J

Herstellung einer Temperaturorgel

Material:

· Blechstreifen (100cm x 8cm)

· Klebeband

· Meterstab

· 2 Petrischalen

· Thermometer oder Pyrometer

· Heißes Wasser (ca. 60°C)

· Kaltes Wasser (Kochsalz-/Eisgemisch)

· Flohkrebse in entsprechendem Aufbewahrungsgefäß

Durchführung:

Aus dem Blechstreifen muss man eine Rinne machen, deshalb als erstes die Kanten mit dem Klebeband abkleben, dass man sich nicht schneidet.

Man muss nun eine Skalierung anbringen, die wir in 10 cm Abschnitte unterteilt haben. Begonnen haben wir jedoch nicht ganz am Rand, sondern ein paar Zentimeter entfernt, und daraus eine Biegekante gemacht, an der wir das Blech hochgebogen haben. Nun wie gesagt alle 10cm einen Querstrich, bis zum Schluss. Nun biegt man auch die andere Querseite um, und anschließend die Längsseiten, sodass man eine Rinn hat.

Ermitteln der Temperaturpräferenz:

Um die Temperaturpräferenz zu ermitteln, füllt man das heiße Wasser in die eine, und das Kochsalz/Eis Gemisch in die andere Petrischale. Man stellt nun die Petrischalen so hin, dass man die Rinne darauf legen kann. Als nächstes muss man etwas warten, bis sich ein gleichmäßiger Temperaturgradient von mindestens 30°C eingestellt hat.(z.B. von 0°C bis 30°C) Dies misst man zwischendurch immer wieder mit dem Thermometer, oder dem Pyrometer. Wenn man einen gleichmäßigen Gradienten hat, so erstellt man ein Schaubild, wobei man auf der X-Achse die Entfernung von der einen Seite abträgt (10cm, 20 cm…). Auf der Y-Achse trägt man die Temperatur ab. Hierzu macht an auch noch eine entsprechende Wertetabelle.

Nun ein paar Flohkrebse in die Mitte der Temperaturorgel geben. Nun alle 5 Sekunden ein Kreuz in das Feld der Wertetabelle machen, die dem Standpunkt eines Tieres entspricht, achtung, pro Tier benötigt man eine eigene Wertetabelle!

Nun noch ein Schaubild zeichnen, und auswerten.

Von 7 Tieren bevorzugten 4 Tiere das kältere Wasser ( ca. 8 °C), nur 2 Tiere blieben in einem etwas wärmeren Bereich und ein Tier hat sich immer im Bereich von 20,4 °C aufgehalten.

By J

Water heating up with a gas burner

Water heating up with a gas burner :

Materials:

Gas burner
1l water
Thermometer
Clock

First we weighed the burner.
The weight of the burner was 374.54

Work procedures:
We warmed up the water with the gas burner and at the same time examined we with the thermometer per minute the temp. These values will label themselves we and considered themselves which them for us meant.

2.Evaluation : Our values resulted in that after nine times measure the temp. and short waiting the temp. sank. Subsequently, we again weighed and tightened the burner that there was a decrease in weight of 5.90g with the burner and that the Wasssertemp. around 62°C. had risen.

3.:Tasks We had to compute the task the thermal capacity of water.
In addition some values were given: Calorific value of butane/propane (contents of the burner) Thus we could durschnittl. Energy consumption of 50 mJ/Kg compute.

Weight loss of the burner 5.90g.

Weight of the water 1000g. Temperature increase in K 62K.

The formula of the thermal capacity: Heat energy /Gewicht * temperature difference
Formula of the heat energy: Energy consumption was warmed up * weight of the burned material /Gewicht of the material
Heat energy of the burner: 0.295 mJ Thermal capacity of water: 0.295mJ/1000g*62K =18.29 J/g*K If one checks now in a book, one will notice that our value is not correct.

Reasons for wrong value:
Burner does not pass the whole heat energy on to the water
Measuring error

von D

Erwärmung von Wasser mit dem Gasbrenners

Materialien:

1. 
   
   
   Gasbrenner










2. 
   
   
   1l Wasser










3. 
   
   
   Thermometer










4. 
   
   
   Uhr

Zuerst haben wir den Brenner gewogen . Das Gewicht des Brenners war 374.54

1. 
   
   
   Arbeitsschritte:

Wir erwärmten das Wasser mit dem Gasbrenner und gleichzeitig überprüften wir mit dem Thermometer je Minute die Temp. Diese Werte schrieben wir uns auf und überlegten uns was sie für uns bedeuteten.

2.Auswertung:

Unsere Werte ergaben dass nach neunmaligen messen der Temp. und kurzem Warten die Temp. sank .

Anschließend haben wir den Brenner erneut gewogen und festgestellt, dass es beim Brenner einen Gewichtsverlust von 5.90g gab und ,dass die Wasssertemp. um 62°C. gestiegen war.

3.Aufgaben:

Wir hatten die Aufgabe die Wärmekapazität von Wasser selbst zu berechnen.

Dazu waren einige Werte vorgegeben : Brennwert von Butan/Propan (Inhalt des Brenners)

Damit konnten wir den durschnittl. Energieverbrauch von 50 mJ/Kg berechnen .

Gewichtverlust des Brenners 5.90g.

Gewicht des Wassers 1000g.

Temperaturzuwachs in K 62K.

Die Formel der Wärmekapazität: Wärmeenergie /Gewicht* Temperaturunterschied

Formel der Wärmeenergie : Energieverbrauch * Gewicht des verbrannten Stoffes /Gewicht des Stoffes der erwärmt wurde

Wärmeernergie des Brenners : 0.295 mJ

Wärmekapazität von Wasser :0.295mJ/1000g*62K =18.29 J/g*K

Wenn man jetzt in einem Buch nachschaut ,wird man merken dass unser Wert nicht richtig ist.

Gründe für Falschen Wert :

Brenner gibt nicht die ganze Wärmeenergie an das Wasser weiter

Messfehler

von D

Measurements of abiotic factors in the aquarium


1.Teperatur

Measure the temperature at 3 places in the aquarium, in which you expect maximum differences.

A special water thermometer brings us the following results:

1.water surface: 17°C
2.middle of the water: 17°C
3.Water surface: 17°C

2.Light

Measure the incident light directly under the HQI light.
We measure with a photosensor at four different places
Result:
1. directly at the lamp 110850 lux
2. Environment (direction room light) 280 lux
3. of the window 700 lux 4. at the water surface 330 lux.

3.PH value:

Measure the pH value of the aquarium water:
Result: pH = 7,6 4.

4. Oxygen content:

Measure the exact oxygen content of the aquarium water:
Result: 9,1mg O2/l 5.Karbonathardens

Measure the Karbonathardens of the water:

We measure with Teststrip

Result: 6°d od. 1068mg/l (CaCO3)

How do the relationship formulas read?
Carbon dioxide: CO2
Hydrogencarbonate ion: HCO3

How does the pH value of the concentration of solved carbon dioxide depend? (Reaction equation)

By following connections and reactions in the water:

CO2 + H2O = H2CO3 H2CO3 + H2O = HCO3 + H3O+

6.Nitrogen compounds:


Measure the concentration of the following nitrogen compounds:

We use respective test sticks to measure.

Nitrite: 0,02mg/l
Ammonium: defective test sticks
How do the relationship formulas read?
Nitrate ion: NO3
Nitrite ion: NO2
Ammonium ion: NH4+


7.Connections of the phosphorus

Measure the concentration of the phosphate in the aquarium water:
3mg/l

We use phosphate test sticks to examine.

How does the relationship formula of the phosphate ion read?
= PO43

The Green Woodpecker

The Green Woodpecker (Picus Viridis):





Appearance: I am a Green Woodpecker and can up to 30 cm become long. My clamping width amounts to up to 52 cm and I ranks among the larger kinds of woodpecker in Germany-means top side is dark green, the lower surface is brightly to grey-green colored. My head has a black Facemask from the eyes to the bill is enough. The remainder of my head is red-means tail root is grey green and the ear area is rather whitish. My wings go into the brown and my fitting with springs are grey green. I can become difficult up to ca.180g.





Occurrence: I come into completely Europe except in Scandinavia before and in parts of Asia.Ich live gladly into parks, smaller forests and into strewing fruit meadows. Due to my eating habits I seem to before all only at heights to ca.500 m and in valleys. Food: I look for myself nearly my entire food in the soil, my main food am ants which I with my ca.10 cm am enough tongue from the soil save. I essse in addition, berries, earthworms and spiders or for example flies if it no ants gives or I none finds.





Reproduction: For the reproduction I need first a Broodcave which I a rotten tree build myself. I am already starting from the first Year of Life, Sex hoar frost. The Balz begin mostly in December however it intensify myself only against April. We green woodpeckers are received sogenante season marriages and the female put in May 4-7 eggs, which we breed then alternating. The breeding duration are approx. 16 Days.The young Green Woodpecker read out their parents approx. 1-2 months after it slipped, but they keep still volatile contact to their parents.

by D

Build a solar collector

A goal:

Build equipment, which warms up water with solar power. Use only absolute cheap material as material!

Background:

Save Energy

An achievement goal:

1l water on > 40°C

Initial consideration:

• Water must be in warmth an absorbing container.

• If possible large attack region.

• Possible flowing water.

Beginning:

We have ourselves consider the water by a pipe run to let, which sits before a parabolic reflector. The pipe would have to be closely curved however, in order to offer a large attack region. The parabolic reflector provides for more lights on the point, since it collects the light, and on which bundles desired point.

When first we wanted to line a screen with aluminum foil, but then we decided a cast-off satellite dish to use. Now we had to only consider ourselves a mounting plate for our pipe. Since however with the pipe it was to be managed somewhat with difficulty we decided to darken a glass container outside to align and then the parabolic reflector in such a way that he bundles the light on a side of the container. The container should reflect however at the inner wall, and/or be isolated. In addition could one principle rescue cover to use, which, depending upon which like one warms puts it, either, or keeps cool.

By J