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Galileo was really confused about the geocentric system. He was strongly convinced that sun is in the center of our planetary system, so he was looking for undoubtedly evidences. Then he got the idea to target his telescope to Venus. According to the geocentric system (Ptolemy’s Model) it would not be possible to view all Venus in all phases, but only as a meniscus. But, when he pointed his telescope at Venus he saw all phases from full phase to new Venus. This was an ultimate evidence of the heliocentric system.

Digital White Cane

The use of low-cost microcomputers can contribute to the implementation of innovative ideas with social denominator. Such an idea is the integration of a microprocessor Arduino or Raspberry – pi in a walking stick-cane for the visually impaired. This particular micro processor will bring a camera-color sensor to the bottom of the cane, so that it can distinguish color contrasts in the ground that walks or moves this person with partial or total blindness.

Students must be engaged in a highly motivating learning experience, which is closely related to the tasks and challenges of the real world.

Therefore, emphasis must be given on the learning-by-doing, where the activities in authentic context are strongly emphasized, which means the skills needed in working life, such as being able to work in teams, working in self-guided manner, and assessing of own actions (Thomas, 2000).

The Petrified Forest of Lesvos is one of the most fascinating and rare monuments of geological heritage in the world. Its creation, 20.000 000 year ago is connected with the intense volcanic activity in the Aegean during the Miocene period. A study visit to the petrified forest is proposed for students. Prior by use of ICT we will try to calculate the energy emitted from the volcanic eruption. We will encourage students to find out how trees transformed into stone and how was the Aegean Sea during the Miocene Geological Period.

Σχεδόν 2500 χρόνια πριν ο Δημόκριτος συνέλαβε την ιδέα του ατόμου, του μικρότερου σωματιδίου της ύλης. Ο Εμπεδοκλής διατύπωνε τη θεωρία του για το φως ως σωματίδια που κινούνται με ασύλληπτη ταχύτητα. Ο Νεύτωνας νους ανήσυχος ασχολήθηκε με πολλά θέματα, δέχτηκε και εξέλιξε τις απόψεις του Εμπεδοκλή για τη σωματιδιακή φύση του φωτός. Διατύπωσε τη θεωρία του για τις προσπίπτουσες και ανακλώμενες δέσμες φωτός. Αρκετά χρόνια αργότερα οι Young και Huygens παρατηρούν τα κυματικά φαινόμενα του φωτός. Ο επιστημονικός κόσμος αρχίζει να πιστεύει ότι το φως είναι κύμα.