Suzie q wants to know the effect of different colors of light on the growth of plants. she believes that plants can survive best in white light. she buys 5 ferns of the same species, which are all approximately the same age and height. she places one in white light, one in blue light, one in green light, one in red light and one in the closet. all of the ferns are planted in miracle-grow and given 20 ml of water once a day for 2 weeks. after the two weeks, suzie observes the plants and makes measurements. what is the dependent variable in this experiment?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. 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.