Answer:
Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe.
Explanation:
Answer: Homogenous mixture.
Explanation:
6). the presence of caffeine on the worm's skin
7). the worm's heart-rate
8). "Dripping caffeine on a worm's skin causes the worm's heart to beat faster."
(Note: The things she observed suggest but do not PROVE that this hypothesis is true.)