What Is the Spring Equinox?

Are you fascinated by the sun, moon or stars? The spring equinox, also known as the vernal equinox, welcomes warm weather as the sun shines on Earth’s equator. Observed around the world, this astronomical event cues signs of spring for all to marvel at. 

Between budding floral trees and the vibrant green hues of new plant growth, springtime provides a nature lab right in your backyard! After the equinox, sunlight lasts longer and longer, marking a perfect starting point for discovering all the fun surprises this season has in store. Read on to find ways to engage your senses, explore the wonder of STEM and uncover the science of the spring equinox.

What Is the Science of the Spring Equinox? 

Balancing the same amount of day and night, the spring equinox is when the sun crosses the equator, bringing brighter days to plants, animals and people! Occurring only twice a year, an equinox is when day and night are almost the same length across the globe. Equinoxes are often associated with themes of balance, harvest and new beginnings. 

After the spring equinox, the Northern Hemisphere tilts toward the sun. As light and warmth increase, opportunities for STEM exploration are in abundance! Check out the following ideas for investigating STEM in nature.

Study How Plants Grow 

As the season welcomes leafy greens and colorful blooms, spring is an ideal time to study how plants grow. From planting seeds to nurturing growing plants with water and adequate sunlight, you can study how plants and flowers grow through photosynthesis. Consider starting your own garden to become an expert.

Find Seasonal Foods

Did you know that the cooler temperatures of early spring are ideal for growing specific fruits and vegetables? From kale to mangoes, finding seasonal foods is a fun way to celebrate the season. To enjoy the sweetness of spring, try making a fruit skewer with strawberries, mango and pineapple! 

Start Bird Watching

As the northern regions of the Earth warm, bird watching is a terrific way to enjoy wildlife and even discover the rush of spring migration. You can create a simple DIY bird feeder from recycled and natural materials to place in an outdoor space where you can easily view what birds come to visit this spring. Listen for the return of chirping, grab a notebook and discover how bird feeders can help you build STEM observation skills!

Measure Shadows

Depending on the sun’s position in the sky, your shadow length changes throughout the day. As the days get longer in spring, try measuring the length of your shadow to track the angle of Earth’s axis. You can start by picking a fixed spot to record your shadow each day during morning and afternoon intervals. As the Northern Hemisphere veers closer to the sun, record daily measurements, analyze your data and make observations about how the sun’s position corresponds to your shadow! 

Discover More Trends in STEM

To keep curiosity growing all year long, explore more of our blog for seasonal inspiration and fun STEM activities.