Eight petri dishes are filled nearly to the brim with finely sieved, moist garden soil and 50 cress seeds are planted in each one. They are then placed inside a device which keeps each of the samples at a different temperature, whereby they are evenly distributed between cold and warm regions. After 5 days it will be clear that the optimum temperature is between 20-25°C. Where the temperature exceeds 30°C, germination is considerably delayed and the same is true if the temperature is below 15°C.
| Materiallist (Excerpt) |
Product |
Amount |
|
Temperature organ
|
65983-93
|
1
|
|
Bunsen burner /DIN/,nat.g.,w.cock
|
32168-05
|
1
|
|
Tripod,ring d=140 mm, h=240 mm
|
33302-00
|
1
|
|
Lab thermometer,-10..+50C
|
38055-00
|
6
|
|
Safety gas tubing, DVGW, sold by metre
|
39281-10
|
1
|
|
Scissors,straight,blunt,l 140mm
|
64625-00
|
1
|
|
Students thermometer,-10...+110°C, l = 180 mm
|
38005-02
|
1
|
|
Glass beaker DURAN®, tall, 400 ml
|
36005-00
|
1
|
|
Wire gauze 160 mm x 160 mm, ceramic cen.
|
33287-01
|
1
|
|
Spoon,w.spatula end,18 cm,plastic
|
38833-00
|
1
|
|
Rubber tubing, i.d. 8 mm
|
39283-00
|
2
|
|
Petri dish, d 100 mm
|
64705-00
|
5
|
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