Photosynthesis

This passage describes the plant process called photosynthesis.

Lexile Level: 490L

Categories: Science & Technology Animals & Nature


Photosynthesis is a process that helps trees make energy. Trees need energy to grow. The process is like a recipe. It turns light, water, and carbon dioxide into sugar. In winter, there isn't enough light for this process. Trees can't make enough sugar to stay healthy. They need to save energy. As a result, trees "go to sleep." In other words, the process stops. As days get shorter in the fall, trees stop making chlorophyll. Chlorophyll helps trees collect light. Remember, light is part of the recipe. Without chlorophyll, photosynthesis doesn't work. You can see when a tree stops making chlorophyll. You can see trees prepare for winter. Chlorophyll gives trees their green color. When trees stop making chlorophyll, they lose their green color. It fades away. Leaves turn red, orange, yellow, and brown. Surprisingly, trees always have these colors. They are just hidden by the green color.


Peanuts and George Washington Carver

There once was a slave named George Washington Carver. He grew up to be a famous scientist...

Read

Lighthouses

Lighthouses were once lifelines to sailors. They helped them steer their boats to the corr...

Read

Spectral Imaging

The U-2 is an old spy plane. It used to fly over the former Soviet Union. Now, the plane h...

Read