Earth MCQ Question and Answer | Geography MCQ Question

On January 3, Earth reaches perihelion, its closest point to the Sun in its yearly orbit around our star.

Mohorovicic Discontinuity lies between Crust & Mantle, the word 'discontinuity' used here represents the (region) where seismic waves change velocity.

While longitudes are imaginary lines running from north to south pole and parallel to prime meridian. In total they are 360 in number. Longitudes are 360 and latitudes are 181.

The antipodal position of a place located at 35° south and 80° west is 35° north and 100° East.

International Date Line follows the meridian of 180° longitude down the middle of the Pacific Ocean for some time. In the north the date line turns to the east through the Bering Strait and then west past the Aleutian Islands in order to keep Alaska and Russia on opposite sides of the line.

The Earth's crust is composed of different types of rocks and minerals. The Earth's crust and upper mantle are collectively known as the lithosphere. This lithosphere is divided into tectonic plates, which float on the semi-fluid asthenosphere below.

The term 'Sima' stands for "silica + magnesium," referring to the composition of the rocks in the Earth's crust and uppermost mantle. Silicates rich in magnesium are denser and heavier than those rich in other elements like aluminum. These heavier silicates, or 'Sima', are most abundant in the ocean floors, which are part of the Earth's crust.

The ocean floors are primarily composed of basaltic rocks, which are rich in magnesium and iron. These rocks make up the oceanic crust. Basalt is formed through volcanic activity at mid-ocean ridges and is a type of 'Sima' material.

In contrast, the continental crust is composed of lighter silicates known as 'Sial', which stands for "silica + aluminum." These lighter silicates are less dense and make up the landmasses and continental areas.

So, the correct answer, 'Option D: Ocean floors', reflects the abundance of 'Sima' (silica + magnesium) in the composition of oceanic crust, making it the most suitable option.

The process of water getting evaporated from the surface of leaves is known as Transpiration.

The correct sequence of the following in the context of the age of the earth since its origin are Protozoic, Palaeozoic, Mesozoic and Cenozoic.

On the 21st of June, 2021 just before 5 p.m. AEST, Australians will bid farewell to the shortest day for the year.

The International Date Line (IDL) is an important concept in geography that helps define where one calendar day ends and the next begins. Let's analyze the given options:

Statement 1: It is a longitude of 180°.
Correct. The International Date Line is often positioned along the 180° meridian of longitude.

Statement 2: It is determined by 180° longitude but is not a straight line.
Correct. This statement is accurate. The International Date Line is not a straight line due to adjustments made to avoid dividing land areas and nations.

Statement 3: It is a Greenwich meridian helping in fixing time and date.
Incorrect. The International Date Line is not a Greenwich meridian. It serves a distinct purpose of separating different calendar days.

Statement 4: It solves the problem of time and date among the World's nations.
Correct. The International Date Line indeed helps address the challenge of coordinating time and date differences across the world, ensuring a systematic transition from one day to another.

Based on the explanations provided, the correct options are E: 1, 2, and 4. The International Date Line is a longitude of 180°, determined by 180° longitude but not a straight line, and it helps solve the problem of time and date coordination among different nations.