I think you mean the Cryosphere? 
But the answer is D- Earths Ice 
This word Cryosphere comes from the greek word "kryos" which means cold 
Many people think of the cryosphere as being the north and south poles  but snow and ice can be found in a lot of places on the Earth
 
        
             
        
        
        
Answer:
A metalloid is used because it is a semiconductor and can become more conductive when more light shines on it
Explanation:
The material used in a solar panel is a metalloid. It can often become conductive when more light shines on it. 
Metalloids have properties that straddles between those of metals and non-metals. 
In essence, they can be conductive or not under certain conditions. 
The most important property they exhibit is that they can become more conductive when more light shines on them. This way more electrons are produced. 
 
        
                    
             
        
        
        
density = mass/volume = 100kg/10ml = 10kg/ml
voluime = mass/density = 50g/2 g/ml = 25 ml
mass = density x volume = 2x55 = 110 kg
 
        
                    
             
        
        
        
Answer:
  The velocity of a falling object
Explanation:
   The positive X axis is towards right and positive Y axis is towards up, so North direction is positive
   A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.
   Any vector whose magnitude is greater than 1 is never be a negative vector.
   The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.