Answer:
the river eroding the canyon, revealing layers of history that represent billions of earth years. ... Peering into the Canyon from the rim is like living life on the surface.
Explanation:
It would be the textbook glossary. A dictionary would be equally useful, but in a science class the teacher would want students to rely on the textbook glossary.
Explanation:
perfect day is when one has a great day, the day when he/she achieved or did something great that made them happy.
