The number of squirrels in a certain ecosystem changes over time. These changes can be represented as a number of connected data points. Which method would a student most likely use to show this information?
A: line graph

Which characteristic below most likely accounts for our limited knowledge of galaxies?
A: their great distance from Earth

Which of the following is the best estimate of the number of stars in a typical galaxy?
A: billions

A student is visiting a local limestone quarry and finds fossils of seashells. The quarry is located hundreds of miles from the ocean. The fossils best indicate that
A:
this area was once below sea level.