Alicia created a physical model to show how one of the human body systems works. she first adds sand and pebbles to a glass of water. then, she uses filters to separate the solids from the water.
which organ(s) serve(s) a similar function in the human body?
a) the heart
b) the glands
c) the kidneys
d) the stomach

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.