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Task 3 for Schools: First Leaves

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Lenka Kleger, modified 6 Years ago.
Jedi Council Member Posts: 87 Join Date: 7/27/17 Recent Posts
Dear All,
 
First of all, I would like to thank you for your e-mails with pictures and results and for all the contributions to the Discussion Forum. It is wonderful to see, how active you and your students are and how your trees look like and change.
 
In TASK 3 – First Leaves you will find a table with the date of leaf-unfolding that was predicted for your country (only dates for some trees and country are available). You can compare these dates with the date when you can see first leaves on your tree. 
 
Please complete the task by April 20.


Task 3 – First Leaves

1) Keep observing the branch you selected
  • Once you see a bud opening (= you can see the tip of green leaf), record “budburst” to your data sheet
  • All 4 buds may not open at the same time
  • Compare the date when you can see first leaves on your tree to the date of leaf-unfolding that was predicted for your country (only dates for some trees and country are available)
 
 
NetherlandsCroatiaCzechSwitzerlandGermany
BirchBeginning of April (1)
Mid March
Mid April (19)
End of March
 
BeechEnd of April (26)
End of April
End of April (27)
Mid April
 
OakMid April (13)
Mid April
Beginning of May (1)
 
End of April
Lime 
Beginning of April
End of April (29)
Beginning of April
 
Hazel 
End of March
Mid April (18)
Mid March
 
Cherry 
End of March
End of April (24)
 
 
Fig 
Beginning of March
 
 
 
 

2) Measure the length of a leaf that grows from the bud
  • measure and record the length at least twice a week
  • use a simple ruler to measure the length in mm
  • measure the leaf without the stem

  • continue measuring the leaf until it stops growing
  •  

    3) Take pictures regularly
    • Share the photos here at Discussion forum.
    • If you participate in the Collaboration group, don´t forget to compare your results with your partner school.
     
    4) Optional: Record temperature and precipitation
    If you have an Atmosphere site nearby, keep recording temperature and precipitation data along with observing the leaves and see if there is any link. 

    And do not forget to continue taking pictures of your tree using GrowApp emoticon

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