METALİK AKTİFLİK' KONUSUNUN ÖĞRETİMİNE PROBLEME DAYALI ÖĞRENME YAKLAŞIMININ ETKİSİ

Öz

Anahtar Kelimeler

• probleme dayalı öğrenme, kimya öğretimi, metalik aktiflik

Kaynakça

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50. “Yıl: 2100 ; Yer: Uzay Araştırma Kurumu — Ankara —Türkiye
51. Güneş sisteminin ll. gezegeni henüz keşfedilmiştir. Bu gezegeni araştırmak için Türkiye’den
52. astronotların bu gezegene gitmesi gerekmektedir. Bu gezegene gitmek için yapılacak uzay gemisini ülkenin
53. değerli bilim insanları olarak siz görevlendirildiniz. Ancak geminin yapılacağı metalin farkh bir özelliğe sahip
54. olması gerekmektedir. Çünkü bu gezegen güneş sistemindeki bir çok gezegenden çok farklı özelliklere sahiptir.
55. Örneğin gezegenin %89’u denizlerle kaplı, kara miktarı çok az; bu yüzden geminin karaya inme şansı yoktur.
56. Yani yapılacak gemi denize inebilecek özelliğe sahip olmalıdır. Ancak deniz suyu dünyadaki deniz suyu gibi
57. değildir. Gezegende çok miktarda çinko sülfat olduğu için deniz çinko sülfat tuzunun çözeltisi halindedir.
58. Bununla birlikte gezegeni saran hava tabakası da atmosfere benzememektedir. Hava tabakasının % 76,3’ ünü
59. sülfürik asit oluşturınaktadır. Bu durumda geminin yapıldığı metal sülfürik asitten etkilenmeyen bir metal
60. olmahdır. Acaba böyle bir metal var mıdır?
61. Uzay Araştırma Kurumu’nun laboratuvarında gruplar halinde çalışarak uzay gemisinin hangi metalden
62. yapılacağını bulunuz.”