The river situated along the border between the USA and Mexico is

A. the Rio Grande
B. the Amazon
C. the Mississippi
D. the Colorado
✅ The correct answer is option A.
Rio Grande, Spanish Río Grande del Norte, or (in Mexico) Río Bravo, or Río Bravo del Norte, fifth longest river of North America, and the 20th longest in the world, forming the border between the U.S. state of Texas and Mexico.

The northern portion of the western coastal plain is called

A. Konkan plain
B. Malabar coast
C. Coromendel coast
D. None of the above
✅ The correct answer is option A.
The region consists of three sections: the Northern part of the coast is called the Konkan (Mumbai-Goa), the central stretch is called the Kanara, while the southern stretch is referred to as the Malabar Coast.

The slow down slope movement of soil and sediment because of frost heaving and thawing is called

A. solifluction
B. gelifluction
C. frost creep
D. rockfall
✅ The correct answer is option C.
Frost creep is the slow downslope movement of soil and sediment because of frost heaving and thawing. The process begins with the freezing of the ground surface elevating particles at right angles to the slope.

The unit of the light year is used for measuring

A. speed of satellites
B. speed of ships
C. distance between bodies in the universe
D. speed of rockets
✅ The correct answer is option C.
A light year is a way of measuring distance. That doesn’t make much sense because “light year” contains the word “year,” which is normally a unit of time. Even so, light years measure distance. You are used to measuring distances in either inches/feet/miles or centimeters/meters/kilometers, depending on where you live.

The moon orbits the earth at a mean distance approximately

A. 0.384 million km
B. 149.6 million km
C. 579 million km
D. 227.9 million km
✅ The correct answer is option A.
The moon orbits Earth at a mean distance of just over 384,000km. The moon’s orbit around Earth is also slightly eccentric – at perigee (its closest distance to Earth), it’s a little over 362,500km from Earth, while at apogee (furthest from Earth), it is almost 405,500km away.