Test 3 Part 4
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PART 4 Question 31-40
Complete the notes below.
Write ONE WORD ONLY for each answer.
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Bird Migration Theory
Most birds are believed to migrate seasonally.
Hibernation theory
- It was believed that birds hibernated underwater or buried themselves in 31..............................
- This theory was later disproved by experiments on caged birds.
Transmutation theory
- Aristotle believed birds changed from one species into another in summer and winter.
- In autumn he observed that redstarts experience the loss of 32.............................. and thought they then turned into robins.
- Aristotle's assumptions were logical because the two species of birds had a similar 33..............................
17th century
- Charles Morton popularised the idea that birds fly to the 34.............................. in winter.
Scientific developments
- In 1822, a stork was killed in Germany which had an African spear in its 35.............................. .
- previously there had been no 36.............................. that storks migrate to Africa
- Little was known about the 37.............................. and journeys of migrating birds until the practice of ringing was established.
- It was thought large birds carried small birds on some journeys because they were considered incapable of travelling across huge 38............................. .
- Ringing depended on what is called the 39 '.............................' of dead birds.
- In 1931, the first 40............................. to show the migration of European birds was printed.
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Part 4, Questions 31-40
31 mud
32 feathers
33 shape
34 moon
35 neck
36 evidence
37 destinations
38 oceans
39 recovery
40 atlas