Storyclover
Storyclover
On a bright July morning, Mira balanced a melting ice pop on the porch rail and studied a globe. The Sun shone above her, just as it had in January. “Why is Earth warm now and cold then if the Sun is always there?”
Why Does Earth Have Seasons If the Sun Is Always There?Earth's tilted axis changes the angle and length of sunlight in each hemisphere during the year, creating seasons.
1. On a bright July morning, Mira balanced a melting ice pop on the porch rail and studied a globe. The Sun shone above her, just as it had in January. “Why is Earth warm now and cold then if the Sun is always there?”
2. She carried the question inside and set a wool hat beside a seashell, two clues from two seasons. Summer left sticky fingerprints on the table; winter offered no answer. Mira tucked the globe under her arm and went to find someone who might know.
3. Grandpa Arun was in the sunroom, where a desk lamp waited beside a globe. “Let’s ask the light a better question,” he said. He tilted the globe’s axis instead of placing it straight up and down.
4. Mira held the globe so its northern half leaned toward the lamp. The light covered less of the globe and looked more concentrated there. “This is more like summer,” she said.
5. Then she held the globe with its northern half leaning away. The lamp made a longer, slanting patch that spread across the surface. Less light reached each small piece of ground. “This is more like winter,” Mira said.
6. Mira frowned. “Does Earth tip toward the Sun, then tip away six months later?” Grandpa Arun placed the globe on an oval track. “No. Earth keeps its tilted axis pointing in nearly the same direction while it travels around the Sun.”
7. At one place along the model’s orbit, the northern half leaned toward the lamp while the southern half leaned away. The two hemispheres could not have the same season at the same time. Summer in one could mean winter in the other.
8. Half a turn around the lamp later, the globe would stand on the opposite side of the model orbit, still tilted the same way. Now the northern half would lean away, and the southern half would lean toward the light. The tilt, not a dramatic change in distance, was doing the important work.
9. Grandpa added the missing piece. When a hemisphere tilts toward the Sun, it receives more direct light and longer days. When it tilts away, the light arrives at a lower angle and daylight is shorter. More energy makes warmer days; less makes cooler ones.
10. At sunset, Mira looked from the glowing sky to the globe in her backpack. The Sun had not needed to switch on or off, and Earth had not needed to wobble like a toy. Earth’s tilted axis changes the angle and length of sunlight in each hemisphere during the year, creating seasons.
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