Dokument_1.pdf (4369 KB) - OPUS Bayreuth - Universität Bayreuth

TSED_A_231300.fm Page 19 Tuesday, July 10, 2007 6:31 AM
Workstations in Science Education 19
Appendix D. Test item examples
I) A common feature of the wings of all birds is:
[squ] They have no thumbs.
[squ] They cannot be stretched completely.
[squ] They have a wide wing panel.
[squ] The cross section is narrow.
[squ] The cross section is arched. [correct]
II) On the picture above you can see an aerofoil model. Inside are movable balls.
What do you think will happen, if the air generator is turned on?
[squ] The balls will be lifted mainly because on of an overpressure.
[squ] The balls will be lifted mainly because on of a negative pressure. [correct]
[squ] The air-stream presses the balls bottom-up.
[squ] The balls won’t move, because the aerofoil is not flapping like a bird.
[squ] The balls will float in the middle of the wholes.
III) One of the following statements is wrong. Mark it with a cross!
For gliding, birds need …
[squ] … warm, ascending air
[squ] … ascending air at mountainsides
[squ] … huge wings
[squ] … plenty of energy [correct]
[squ] … the tail feathers for navigation
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