Scientists need to gather information that is based on direct observation rather than opinion or feelings.
Answer:
C. Rocks rich in calcium, potassium, and sodium, weather into fertile soil.
Explanation:
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.
Hence, the statement which is true is that, rocks rich in calcium, potassium, and sodium, weather into fertile soil because these nutrients (chemical elements) are responsible for determining the level of fertility of a soil.
Answer:
It's used for capturing, storing, checking and displaying data related to positions on the Earth's surface.
Explanation:
Geographic informations system (GIS) is a computer system to capture and store data related to the positions on the Earth's surface.