Examlex
Using the method of comparing distances to time intervals to get a handle on the large distances in astronomy,compare the diameter of our Solar System,which is 6 × 1012 to the diameter of the Galaxy,which is 1.2 × 1021 by calculating the time it would take for light to travel these diameters.For reference,the speed of light is 3 × 108 m/s.
Hidden Objects
Games or puzzles where the player must find items from a list that are hidden within a picture.
Hypothalamus
A region of the brain below the thalamus, coordinating both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.
Homeostasis
The regulation of internal conditions within cells or organisms to maintain a stable, constant environment.
Autonomic Nervous System
The part of the nervous system that controls involuntary actions of the body, such as heart rate, digestion, and respiratory rate.
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