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Exposition encourages discussion and arouses curiosity among teachers and students
The House of Science welcomed 130 students and teachers from October 17th to 20th during the activities of the National Week of Science and Technology – event promoted by the Ministry of Science and Technology, and developed the theme “Climate changes, natural disasters, and risk prevention”. 
The exposition “Point and Counterpoint: Environmental Balance and Imbalance” encouraged the discussion and awaken curiosity about concepts such as history of the Earth and fossils, phylogeny and evolution, bees and biological markers, microscopy, and also favorable (and unfavorable) condition to life in a lake. Everything articulated with the concept of adaptation and specialization of structures, and with natural selection. 
The exposition offered golden afternoons dedicated to the discussion of concepts counting on the active participations of the visitors. The 16-years old Gabriela Moreira Buranelli, student at Colégio Semeando de Batatais, praised the topics developed and highlighted how important it was to have experts there. “I noticed that everyone knew exactly what they were talking about. I thought it was very interesting”, she said. 

Birth of planet and Earth and Fossils 
The visitors saw the movie “Somos Terra” (“We are Earth”), produced by Ozi Escola de Audiovisual that ceded it for exhibition during the exposition. This 4-minutes animation, produced from 3D modeling, illustrates the birth of the planet Earth and how climate changes have happened for billions of years. Visitors also checked out some samples of fossils of trilobites, fish, cockroach, cricket, and so on. For the students, it was excitedly different to observe the fossils seen in the books: “It’s so different, there’s no explanation, and it is much more interesting when you meet an expert, because you want to learn more and more. I loved it”, Gabriela declared.
Phylogeny and evolution 
Phylogeny and evolution 
A range of materials was presented to guide the discussion about evolution. The students were led to identify patterns and to trace the relation among several organisms, such as coelenterates, mollusks, and mammals. Terms like adaptation and natural selection were introduced and discussed in this space. 
Bees and biological markers.
Bee and biological markers 
A trunk of Tecoma stans with nests of solitary Xylocopa bee, also known as carpenter bee, was the central point of this space, which brought a poster with the method to build trap nests for solitary bees. Bees are animals that need a stable and preserved environment to grow and reproduce, once it depends on nectar and pollen of flowers. Visitors were also invited to observe some bee’s specializations, as the corbicula and the buccal apparatus, for the collection of pollen and nectar, and also how they plan to build their nests and even how it influences on the definition of the offspring gender – male or female. For 14-years old Maria Laura Fernandes, student at Colégio Semeando from Batatais, the carpenter bee surprised: “I have never thought that a bee could be so solitary”. Eleven years old, Étore Santos, from the same school, got carried away when he heard about the reproduction strategy: “I liked the bee’s logic, how it lays the eggs and the right time to do that”. Étore also assured that he will follow on what he has learned: “I will build a trap nest at home”. 
Observing microscopic organism is not an easy task. In this space, the students observed blades of zooplankton – small microcrustaceans (copepods and cladocerans) that live in the aquatic environment surface – and explored their morphology, comparing them to the trilobites fossils, observed before. The students were led to think about the relation of the specializations of the segments and body appendixes. 
The formation of the clouds was also discussed, due to the relation of the microalgae and the release of dimethyl sulfate (DMS), a very light gas that carries water molecules up to the clouds, filling them up. To understand the intracellular dynamics, the students explored chloroplasts in movement of the Elodea, known as cyclosis. 
The students followed up and discussed the appearance of two lake simulations, one with animals and plants and the other eutrophic (phenomenon caused by the excess of nutrient and the consequent decrease of oxygen). Using chemical reagents, they tested the water quality by indicating the amount of oxygen in each one.     

Check out the pictures of the exposition: 


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