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Birch Locations:
birch1                                        birch2
Latitude | 45.499011°             Latitude | 45.5069°
Longitude | 15.55176°             Longitude | 15.4992°
Elevation | 112.5m                   Elevation | 209.0m

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tree height: 17,55m                circumference: 150 cm

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OŠ Banija, Karlovac, Croatia: Birch2 15/9/2021

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OŠ Banija, Karlovac, Croatia: Birch2 15/9/2021

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tree height: 17,55m
circumference: 150 cm

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All leaves are  5G:4/2
The air temperature was 26°C and the soil was dry.

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All leaves are  5GY:4/8

The air temperature was 15°C and the soil was wet.

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tree height: 20,17m                          circumference: 200 cm      

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OŠ Banija, Karlovac, Croatia: Birch1 15/9/2021

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OŠ Banija, Karlovac, Croatia: Birch1 15/9/2021

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tree height: 20,17m
circumference: 200 cm

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All leaves are  5GY:4/8
The air temperature was 10°C and the soil was wet.

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OŠ Banija, Karlovac, Croatia  13/10/2021

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OŠ Banija, Karlovac, Croatia  13/10/2021

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All leaves are  5GY:4/8

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All leaves are  5GY:5/10
The air temperature was 20°C and the soil was dry.

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All leaves are  5GY:6/10

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All leaves are  5GY:6/10
The air temperature was 13°C and the soil was wet.

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All leaves are  5GY:6/10

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Leaf 1 5GY6/10                Leaf2 5Y8/4        Leaf3  5GY7/12      Leaf4 5GY6/10
It is raining and the air temperature is 9 degrees. The leaves on the birch begin to change color.

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Leaf 1  2.5GY8/12      Leaf2 2.5GY8/12      Leaf3  2.5GY8/12     Leaf4 5GY5/10

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Leaf 1  2.5GY8/12    Leaf2 2.5GY8/12       Leaf3  2.5GY8/12      Leaf4 5GY5/10

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leaf 1- 2.5Y8/12   leaf 2- 2.5Y8/12   leaf 3- 2.5Y8/12  ​​​​​​​
leaf 4- 5GY5/10

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leaf 1- 2.5Y8/6   leaf 2- 2.5Y8/12   leaf 3- 2.5Y8/12  ​​​​​​​
leaf 4- 2.5Y8/12

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Birch 1                                      Birch 2
Latitude: 45,491684             Latitude: 45,4917
Longitude: 15,53771        Longitude: 15,53771
Elevation: 111 m                 Elevation: 111 m

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15.9.2021.

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OŠ Dubovac, Karlovac, Croatia, 22.9.2021.

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OŠ Dubovac, Karlovac, Croatia, 22.9.2021.

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All leaves:    5GY:4/8

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OŠ Dubovac, Karlovac, Croatia, 29.9.2021.

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OŠ Dubovac, Karlovac, Croatia, 29.9.2021.

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All leaves:    5GY:4/8
Air temperature: 23C

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Observing on 4th and 13th Octobar
All leaves:    5GY:4/8

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OŠ Dubovac, Karlovac, Croatia, 20.10.2021.

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OŠ Dubovac, Karlovac, Croatia, 20.10.2021.

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Birch 1:
1.leaf:  5GY:4/8    2.leaf:5GY:5/10    3.leaf: 5GY:4/8     4.leaf:5GY:4/8
Birch2.
1.leaf:  5GY:5/10    2.leaf:5GY:6/10    3.leaf: 5GY:4/8     4.leaf:5GY:4/8

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OŠ Dubovac, Karlovac, Croatia, 27.10.2021.

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OŠ Dubovac, Karlovac, Croatia, 27.10.2021.

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Birch 1:
1.leaf:  5GY:4/8    2.leaf:5GY:5/10    3.leaf: 5GY:5/10    4.leaf:5GY:4/8
circumference: 120 cm
tree height: 18,9 m
the age of birch tree: 46 years

Birch2.
1.leaf:  5GY:5/10    2.leaf:5GY:6/10    3.leaf: 5GY:5/10    4.leaf:5GY:5/10
circumference: 235  (120+115)
tree height: 20,5 m
the age of birch tree: 48 years

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Oš Dubovac, Karlovac, Croatia, 3.11.2021.

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Oš Dubovac, Karlovac, Croatia, 3.11.2021.

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Birch 1:
1.leaf:  5GY:4/8    2.leaf:5GY:5/10    3.leaf: 5GY:5/10    4.leaf:5GY:4/8

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OŠ Dubovac, Karlovac, Croatia, 3.11.2021.

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OŠ Dubovac, Karlovac, Croatia, 3.11.2021.

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Birch 2.
1.leaf:  5GY:5/10    2.leaf:5GY:6/10    3.leaf: 5GY:5/10    4.leaf:5GY:5/10

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OŠ Dubovac, Karlovac, Croatia, 8.11.2021

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OŠ Dubovac, Karlovac, Croatia, 8.11.2021

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Science learning ; structure of leaf, photosynthesis

Birch 1 - leaf 1- 5GY4/8 - leaf 2 - 5GY5/10  - leaf 3- 5GY6/10  ​​​​​​​- leaf 4- 5GY5/10

Birch2 -leaf 1- 5GY5/10 - leaf 2-  5GY6/10 - leaf 3- 5GY5/10  ​​​​​​​- leaf 4-  5GY6/10

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OŠ Dubovac, Karlovac, Croatia, 17.11.2021.

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OŠ Dubovac, Karlovac, Croatia, 17.11.2021.

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Birch 1 - leaf 1- 5GY4/8 - leaf 2 - 5GY5/10  - leaf 3- 5GY6/10  ​​​​​​​- leaf 4- 5GY5/10

Birch2 -leaf 1- 5GY5/10 - leaf 2-  5GY6/10 - leaf 3- 5GY5/10  ​​​​​​​- leaf 4-  5GY6/10

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On the branch we are observing there is only one leaf left. His color is 2.5Y8/6. Air temperature is 5°C. Weather outside is sunny and clear.

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On the branch we are observing there is only one leaf left. His color is 2.5Y8/6.

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Interview with tree

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BIrch 1.
1.leaf 5GY:7/12
2.leaf: 2,5Y:8/12
3. leaf: 5GY:7/12
4 leaf: 5GY:7/12

Birch 2.
1.leaf :5GY:7/12
2.leaf: 5GY:7/12
3. leaf: 2,5Y:8/12
4 leaf: 2,5Y:8/12

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OŠ Dubovac, Karlovac, Croatia, 24.11.2021.

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OŠ Dubovac, Karlovac, Croatia, 24.11.2021.

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Two birch tree in the school park