A student wants to design an experiment to answer the question, “How does particle size affect the rate at which particles settle out of water to form sediment on the bottom of a container?” What will be the dependent variable in the students experiment? a. the mass of the particles
b. the speed at which the water is moving
c. the time it takes particles to settle out of the water
d. the amount of sediment at the bottom of the container

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species