1
What should you drink regularly to stay hydrated?
Water
What should you do regularly when using a screen for a long time to give your eyes a break?
Look away
What is the colored part of the eye called?
Iris
How many hours of sleep are recommended for teenagers each night?
8–10 hours
Which part of the eye is the white outer layer that protects it?
Sclera
Which part of the eye allows light to enter through an opening?
Pupil
Which chamber pumps blood to the rest of the body?
Left ventricle
Which nutrient is the body's main source of energy?
Carbohydrates
What is the light-sensitive layer at the back of the eye called?
Retina
Which transparent front layer protects the eye and bends incoming light?
Cornea
How does caffeine affect concentration over time, from the initial effect to when it wears off?
It initially increases concentration then drops as it wears off.
What type of protection helps prevent sunburn caused by ultraviolet rays?
Sunscreen
What is the main function of the heart?
Its main function is to circulate blood, delivering oxygen and nutrients and removing waste products.
Which vitamin can your body produce when your skin is exposed to sunlight?
Vitamin D
What mineral is lost through sweat and helps maintain fluid balance in the body?
Sodium
What is the term for needing more caffeine over time to achieve the same effect?
Tolerance