Question

Use all 5 stems in order.​

Connect ideas with transition words.​

Add science words: heating, density, pressure, wind.​

Make one clear paragraph.​

Challenge: Explain why wind happens.

Answer 1

First, the Sun's heating of Earth's surface warms the air above it, causing that air to expand and drop in density; Second, because warm air is less dense it rises and reduces pressure near the ground, which creates a pressure difference with surrounding cooler regions; Third, as cooler, denser air moves horizontally toward the lower-pressure area to balance those differences, that movement of air is what we call wind; Fourth, Earth's rotation and local features like mountains and oceans then modify these flows by bending and accelerating the air, so winds vary in speed and direction; Finally, by following how heating changes density and pressure, we can see why wind happens and predict where and when it will blow.