To get the sizes of the objects approximately correct, she chooses a beach volleyball to represent the sun, a marble to represent the earth, and a pea to represent the moon. she calculates that the distance between the earth and the moon should be about 10 centimeters in her model. about how far should the sun be from the earth in franny's model? a) 20 centimeters b) 2.0 meters c)50 meters d)15 centimeters

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit

Which was not a reason why canals were built in florida