![](http://2.bp.blogspot.com/_QONYKyKHiwQ/TJAqFpuFgUI/AAAAAAAAAOU/HCKJKD2dgVE/s200/cover_bioluminescent.jpg)
![](http://2.bp.blogspot.com/_QONYKyKHiwQ/TJAqFNPPiyI/AAAAAAAAAOM/i5JK_FBBTpk/s200/29_angler_fish.jpg)
![](http://1.bp.blogspot.com/_QONYKyKHiwQ/TJAqEwBnkuI/AAAAAAAAAOE/u5b6htn6olo/s200/bioluminescence-3.jpg)
These lights are made when 2 chemicals are mixed together. The chemical reaction makes the glow.
Look at the brainstorm below to find out why sea creatures make lights.
![](http://2.bp.blogspot.com/_QONYKyKHiwQ/TJAoc2AYHSI/AAAAAAAAANk/jqw7BnUiF0Y/s320/brainstorm.png)
We found out that glowsticks light up in the same way as sea creatures do. The glowstick has 2 tubes, 1 inside the other. Each tube has a different chemical in it. When the glowstick is bent the inside tube cracks open. This makes the 2 chemicals mix together and the chemical reaction causes the glow.
![](http://3.bp.blogspot.com/_QONYKyKHiwQ/TJAoevN2cCI/AAAAAAAAAN8/8ehuCJMI5yk/s320/IMG_2376.jpg)
![](http://1.bp.blogspot.com/_QONYKyKHiwQ/TJAodi48gGI/AAAAAAAAANs/YPThfBjdmp4/s320/IMG_2374.jpg)
![](http://3.bp.blogspot.com/_QONYKyKHiwQ/TJAoeBzwP7I/AAAAAAAAAN0/whv_4UDL2JU/s320/IMG_2375.jpg)
ICE WATER
- The glow was duller.
- It looked like the chemical was freezing.
- The chemical reaction slowed down.
HOT WATER
- The glow was much brighter.
- The part of the glowstick that was in the hot water glowed a lot more than the part that was not in the hot water.
- The chemical reaction sped up.