The fluctuating temperatures in the core depend on pressure, the rotation of the Earth, and the varying composition of core elements. In general, temperatures range from about 4,400Â° Celsius (7,952Â° Fahrenheit) to about 6,000Â° Celsius (10,800Â° Fahrenheit).
Baleen whale (suborder Mysticeti), also called toothless whale, any cetacean possessing unique epidermal modifications of the mouth called baleen, which is used to filter food from water. Baleen whales seek out concentrations of small planktonic animals. The whales then open their mouth and take in enormous quantities of water. When the mouth is closed, they squeeze the water out through the sides, catching the tiny prey on the baleenâs bristles. (See also cetacean: Feeding adaptations).
Dichotomous means âtwo parts,â so a dichotomous key is a series of questions with two answers, often yes or no. In a whale dichotomous key, a sample question might be whether the whale has baleen. Each answer leads you to another question or to the name of the whale. For this exercise, use several pictures of different whales. Before the lesson, print the pictures and a key.