Human Ear How do ears help with balancing?
Human Eyes Why do we have two eyes instead of one?
Osmosis Why is grass killed if salt is sprinkled on it?
Photosynthesis Why is the upper surface of a leaf more green and shiny than the lower surface?
Respiration Why is it not good to sleep under a tree at night?
Turgor Pressure Why does a Touch Me Not plant close?
Stomata Why do water lilies have stomata on the upper side of their leaves?
Respiration in Plants Why should we not overwater potted plants?
Transpiration Why do cacti have spines?
Nervous System Why don't we feel pain when we cut our hair?