Explanation:
I'm guessing the answer is oxygen. 
 
        
             
        
        
        
They use a hygrometer. It measures relative humidity (the amount of moisture in the air) A psychrometer is an example of a hydrometer
        
             
        
        
        
Answer: Thalamus
Explanation:
The thalamus part of the brain is known as the relay station for all the sensory information. This information can be any sought of smell, light, taste et cetera.
It is relayed further via thalamus. Myelinated fiber bundle originates from the lateral surface of thalamus and it terminates at the cerebral cortex.
It is a relay station for the information from brainstem, spinal cord and cerebrum towards the cortex.
 
        
             
        
        
        
Answer:
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
 
        
             
        
        
        
The Kuiper belt is home to three officially recognized dwarf planets: Pluto<span>, </span>Haumea<span>, and Makemake. Some of the Solar System's moons, such as Neptune's Triton and </span>Saturn<span>'s Phoebe, are also thought to have originated in the region.
So the answer is Saturn
Thats what NASA will tell you, but they think the world is round so be careful when they give you "facts"</span>