Hazelnut Time
Made by 
Bulgaria, posted in English Language, on March 19, 2013 2:14 am
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Probability Mathemathics 1
Made by 
Sweden, posted in Mathematics, on October 19, 2012 2:34 am
Probability Mathemathics
Medicinal Plants
Made by 
Romania, posted in Biology, on May 12, 2013 11:06 pm
Column A has the names of several plants useful for the treatment of afflictions and disorders of the nervous system, while Column B has the scientific names for these plants. Match the two names correctly and you will discover the image of the respective plants
Mapping in the plan
Made by 
Czech Republic, posted in Mathematics, on May 14, 2012 1:45 am
10 minutes – create, in a graphic editor, an object then map the object so that it meets these properties
a) No fixed points and it is not congruent mapping
b) No fixed points and it is congruent mapping
c) One fixed point and it is not congruent mapping
d) One fixed point and it is congruent mapping
Chemical reactions
Made by 
Italy, posted in Chemistry, on October 19, 2012 1:10 am
LEARNING OBJECTIVES
? to define a chemical change
? to recognize a chemical change and distinguish it from a physical one
? to read a chemical equation
? to write chemical equations
? to balance chemical equations
? to classify chemical reactions
? to write formation and combustion reactions for given compounds.
? to recognize the limitant reactant
? to make stoichiometric calculations:
from mass to moles, from moles to mass,
yield, masses needed for complete reactions (from a given quantity of a reactant)
Aspirin
Made by Romania, posted in Chemistry, on May 13, 2012 10:57 pm
Acetylsalicylic acid, also known as aspirin, is an acetyl derivate of salicylic acid, which is a weak white and crystalline acidic substance, that has a melting point of 135-137oC.