RISE Science Grade 4 Practice Questions - RISE Science - Grade 4 Exam

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In the Wasatch Mountains, cottonwood trees grow near streams with broad, flat leaves, while pinyon pine trees growing on dry rocky slopes have narrow, needle-like leaves. What is the main reason for this difference in leaf structure?

Pine needles absorb more sunlight than broad cottonwood leaves. Cottonwood leaves help the tree climb up rocks, while pine needles attract birds. Needle-like leaves reduce water loss in dry soil, while broad leaves maximize sunlight absorption near water. Broad leaves protect cottonwood trees from freezing, while pine needles trap rain underground.

Correct Answer:

Needle-like leaves reduce water loss in dry soil, while broad leaves maximize sunlight absorption near water.

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