Identify the main inputs into the hydrological cycle.

1. A system of numbered squares formed by vertical and horizontal lines drawn on the map represents C. Grid references.
Grid references are used to pinpoint locations on a map using a coordinate system.

2. A collection of symbols used to represent both natural and human features found on a map is called C. Conventional signs.
Conventional signs are standardized symbols used on maps to depict various features.

3. When enlarging a map twice its original size, what happens to the new scale? B. It is multiplied by two.
If a map is enlarged twice, the features appear twice as big. This means that 1 cm on the enlarged map represents half the actual distance it represented on the original map. For example, if the original scale was $1:100$, the new scale would be $1:50$. As a fraction, $\frac{1}{50}$ is twice $\frac{1}{100}$, so the scale is multiplied by two.

4. An indication of industrial function on a map is: A. Works.
"Works" on a map typically refers to industrial sites or factories.

5. Which colour is used to identify water body on a map? C. Blue.
Conventionally, water bodies like rivers, lakes, and oceans are depicted in blue on maps.

6. The most convincing proof to show the spherical shape of the earth is? D. Aerial photographs.
Modern aerial photographs, especially those taken from high altitudes or space (satellite