Which of the following best describes a lunar eclipse? Also, calculate longitude and explain the International Date Line and the hydrological cycle.

A lunar eclipse occurs when the Earth passes directly between the Sun and the Moon, casting a shadow on the Moon.

The correct option is C.

$$\boxed{\text{C}}$$

First, calculate the time difference between the local time and GMT.
Time difference = GMT - Local Time
Time difference = 7 pm - 4 pm = 3 hours.

Since GMT (7 pm) is ahead of the local time (4 pm), the place is to the west of the Prime Meridian.
Each hour of time difference corresponds to $15^\circ$ of longitude.
Longitude = Time difference $\times 15^\circ/\text{hour}$
Longitude = $3 \text{ hours} \times 15^\circ/\text{hour} = 45^\circ$.

Since the local time is behind GMT, the longitude is West.

The correct option is A.

$$\boxed{\text{A}}$$

The International Date Line (IDL) is a line on the Earth's surface that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. When crossing the IDL from West to East, you are moving backward in time, which means you gain a day.

The correct option is A.

$$\boxed{\text{A}}$$

Let's evaluate each statement concerning the hydrological cycle:

• A. Water moves continuously from the earth surface to the atmosphere and back to the earth surface. This is a correct description of the water cycle.
• B. Water is taken from the earth's surface to the atmosphere by precipitation. This statement is incorrect. Precipitation is the process where water falls from the atmosphere to the Earth's surface. Evaporation and transpiration are the processes that take water from the surface to the atmosphere.
• C. Water vapour is emitted from plant leaves by a process called transpiration. This is a correct description of transpiration.
• D. Water is taken from the earth's surface to the atmosphere by evaporation from the surface of lakes, rivers, stream and ocean. This is a correct description of evaporation.

The odd statement is B.

The correct option is B.

$$\boxed{\text{B}}$$

Evapotranspiration is the sum of evaporation from the land surface and transpiration from plants. Therefore, it represents the loss of water by both processes.

The correct option is C.

$$\boxed{\text{C}}$$