5.4 Vorbereitete Lernsequenzen
133
Islands in most ecological zones except the leeward savanna and
alpine zones. Within each zone, smaller "islands" are formed by
physical barriers such as cliffs and waterfalls; by soil conditions
such as bogs; by volcanic activity, such as lava flows that isolate
vegetation areas called kipuka; and by weather conditions such
as rain in the rain forests. On the mainland Tetragnatha are
normally located near water in meadows and shrub lands. Why
do the Tetragnatha and other families of spiders in Hawai'i live in
such diverse habitats in comparison to families of spiders on the
mainland? This is one of Dr. Gillespie's key questions.
To answer this question, Dr. Gillespie requests the assistance of
students. She would like students to determine the kind and
number of families of spiders in their area. The basic exercise is
described in the JASON VI: Island Earth Hawai`i Expedition
Curriculum, in Unit One, Lesson 1.5, Evaluative Exercise. By
submitting their spider data online as described below, students
can further aid Dr. Gillespie by sharing their data with her and with
other students and teachers worldwide. Even if you are not using
the JASON Curriculum, you are invited to take part in the online
version of this exercise presented here.
Auf weiteren Seiten werden detailliert Hinweise gegeben, wie
Spinnen zu beobachten, zu fangen und zu klassifizieren sind sowie
in welcher Form die erhobenen Daten übermittelt werden.
A spider's body has two parts, a cephalothorax, consisting of the
head and the thorax, and the abdomen. These two parts are
joined by a short, thin stalk, or pedicel. Four pairs of legs are
attached to the cephalothorax, as are the jaws, or chelicerae,
ending in fangs. Also attached to the cephalothorax are small leg-
like appendages called the pedipalps. Male spiders have clubs at
the end of the pedipalps; females do not. Most spiders have eight
eyes at the front of the cephalothorax -- but some have fewer, and
others have none.
5.4.11 Biologie: Sezieren eines Frosches
Der folgende Ausschnitt zeigt einen Teil der Anleitung (im Original sind
noch mehr Fotos und einige Videosequenzen enthalten). Im Anschluß an
das Studium dieser Anleitung kann der Frosch interaktiv über Internet
seziert werden.
