СОР № 1 Английский язык 11ЕМН класс Investigate and report on animal world: bats, eagles, bees and dolphins

Investigate and report on animal world: bats, eagles, bees and dolphins

Задание:

Answer to the questions. Refer to the text to support your answer.
1. How do flowers and hummingbirds benefit each other?
2. Why does the hummingbird have to eat so often?
3. Why is the ability to hover useful to a hummingbird?

Решение:

1. How do flowers and hummingbirds benefit each other?
Due to feeding on nectar, hummingbirds are pollinators; many plants of the New World are pollinated exclusively by them.
2. Why do hummingbirds have to eat so often?
To provide your body with enough energy, a number of hummingbird species should eat very often — every 10-20 minutes. Birds can also fly in the rain — this is necessary for their survival.
3. Why is the ability to soar useful to hummingbirds?
During the «flight on the spot», the hummingbird has to write out an eight with its wings. Thanks to this, the bird is kept in the air in an upright position. The speed of flapping wings of hummingbirds is huge — about 50-80 flaps per second. But this is not the limit. Caring for a female, a male of one of the hummingbird species makes more than 200 strokes per second. Acceleration to maximum speed and instant stop of these birds occurs almost instantly, in just a few seconds. The speed of a small bird reaches 50 km / h, which is really a lot for such a small creature.