1 00:00:00,000 --> 00:00:09,800 Hi, I'm Wesley Benson with more science news you can use. 2 00:00:09,800 --> 00:00:15,040 Why do leaves on some trees change from green like this to all the brilliant colors we see 3 00:00:15,040 --> 00:00:16,040 in autumn? 4 00:00:16,040 --> 00:00:19,920 Believe it or not, those beautiful colors are there all the time. 5 00:00:19,920 --> 00:00:22,960 Then why can't I see them? 6 00:00:22,960 --> 00:00:27,440 Because the chlorophyll in plant cells absorbs most of the sun's visible light, except for 7 00:00:27,440 --> 00:00:30,640 green, which is reflected back to your eyes. 8 00:00:30,640 --> 00:00:36,000 During autumn, there are fewer hours of sunshine, which cause chemical changes in plants. 9 00:00:36,000 --> 00:00:41,520 These changes cause chlorophyll to break down, and then the leaves no longer appear green. 10 00:00:41,520 --> 00:00:44,480 Now, all the other colors can be seen. 11 00:00:44,480 --> 00:00:48,880 So when the chlorophyll leaves, the leaves can show their true colors. 12 00:00:48,880 --> 00:00:54,040 Well, until next time, I'm Wesley Benson with more science news you can use.