Q: What is the main source of energy for the water cycle?
A: sunlight
Q: Crows are found throughout many parts of the world. They are black birds with excellent hearing. In the wild they live for six to seven years. Some crows in Japan open hard-shelled nuts by dropping them in front of moving cars. Which of these is a learned behavior?
A: Dropping nuts in front of cars
Q: What is determined by the speed that Earth rotates on its axis?
A: the length of a day
Q: Feathers, wings, and the hollow bones of birds are examples of
A:
adaptations for flight