Critical Thinking The gravity of the sun and the moon affects tides
on Earth. The model below shows the positions
of the sun, the moon, and Earth during a spring
tide. Use it to answer questions 8 and 9.
Moon's pull
New
moon
Sun's pull
Sun
Earth
8 Analyze How does this model make it
easier for someone to understand the sun's
and the moon's influences on the tides?
9 Evaluate What do you think are the
limitations of this model?