Blue Light
Blue light comes from the sun and also from this type of device.
What are screens? (phones, tablets, computers)
Your circadian rhythm is also called your body’s what?
What is your body clock?
Looking at your phone right before bed can make it harder to do this.
What is fall asleep?
If you want better sleep, try lowering this on your screen at night.
What is brightness?
Blue light wakes you up in the morning by boosting this feeling.
What is energy?
Blue light has this kind of energy — high or low?
What is high energy?
Your body clock helps tell you when to sleep and when to do this.
What is wake up?
Experts say you should turn off screens this many minutes before bed.
What is 30–60 minutes?
Instead of using your phone in bed, you can read one of these.
What is a book?
Animals like dogs and cats also follow this rhythm.
What is a circadian rhythm?
This everyday object also gives off blue light at home.
What are LED light bulbs?
This hormone helps you feel sleepy at night.
What is melatonin?
Blue light tricks your brain into thinking it's still this time of day.
What is daytime?
Wearing these yellowish glasses can help block blue light.
What are blue light glasses?
This giant blue-light source in the sky is the reason humans wake up in the morning.
What is the Sun?
Blue light tells your brain to stay this:
What is awake?
Blue light at night can stop your brain from making this important hormone.
What is melatonin?
Teens who stay on their phones late often wake up feeling this.
What is tired?
Spending a little time outside in the morning sunlight helps reset this.
What is your circadian rhythm?
Too much blue light at night can make you cranky and hurt this — your ability to focus.
What is concentration?
Scientists say blue light is part of the “visible light spectrum.” This means we can do this with it.
What is see it?
Your circadian rhythm follows a natural cycle that is about how many hours long?
What is 24 hours?
This “mode” on phones reduces blue light at night.
What is Night Mode or Night Shift?
Your room should be dark and cool at night because your body sleeps best under these conditions.
What are dark and cool environments?
Your circadian rhythm controls more than sleep — it also controls your hunger and your body’s what?
What is temperature?