Maritime polar air mass is described as <span>a. cold and humid air mass that affects the US. These air masses came from northern Pacific and north-western Atlantic regions. Because of the moisture they carry, they can also bring clouds and precipitation.</span>
        
             
        
        
        
D. Made of ash and pieces of rock rich in silica.
Should be your answer!
 
        
                    
             
        
        
        
Answer:
Nutrient 
Explanation:
Ecology can be defined as the scientific study of the relationship between living organisms such as plants and animals in relation to their physical and biological environment. 
Nutrient inputs to the system come from weathering of rocks, from windblown dust, and from precipitation, which can carry material great distances. Various amount of nutrients are transported or transfered from terrestrial ecosystems through erosion and then deposited in aquatic ecosystems such as oceans, seas, and associated lowlands.
Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.
Weathering can be defined as the physical and chemical breakdown of rock into smaller pieces called sediment. Weathering can be classified into two categories namely;
I. Physical weathering : it is the process of breaking rocks into pieces without affecting its chemical composition e.g temperature, abrasion and frost action.
II. Chemical weathering : it is the process of breaking rocks into pieces by chemical action which leads to changes in its chemical composition e.g carbonation, hydration, plant acid and oxidation.
 
        
             
        
        
        
Hi lovely! Here are your scientific questions that are testable: 
Does the type of liquid affect how fast an ice cube melts? 
Does changing the temperature of water affect the buoyancy of an egg?
Does the thickness of the wire affect the power of the circuit?
Hope I helped!
        
             
        
        
        
The expirement is saying show the circle of water 
1.the water mocules move apart so it is a gas 
2. when the water mocules build  up in the cloud  and the water relese
3. the rain freezes then meltes and starts all over to 1