Read both responses carefully before answering the instructor question.
Leaves change color in the fall because chlorophyll breaks down as daylight decreases and temperatures cool.
As the green chlorophyll fades, yellow and orange pigments that were already present become visible. Some trees also produce red pigments called anthocyanins.
Leaves change color because cold air paints them different colors.
The colder the weather becomes, the more color is added to each leaf until it falls from the tree.
TopicSeasonal Leaf Color
Skill FocusFactual Accuracy
DifficultyFoundation
Time Estimate10–15 min