If the Sun Passes Directly Overhead on at Least One

question 1

Multiple Choice

If the sun passes directly overhead on at least one day per year, then

• A) you are within 23° latitude of the equator.
• B) you are within 66° latitude of the equator.
• C) you must be exactly on the equator.
• D) you could be anywhere because this occurs at least once per year at any location on the Earth.

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Definitions:

Long-day Plant

Plants that flower only after being exposed to light periods longer than a certain critical length.

Sunflower

A large plant belonging to the daisy family, known for its large flowering heads and edible seeds.

Shade Avoidance

A growth response of plants to reduce shading by neighboring plants, often resulting in elongation of stems and leaves to reach light.

Far-red Light

A spectrum of light at wavelengths longer than that of red light, between 700 and 800nm, crucial for plant physiological processes.