Origin and Evolution of Earth - Practice Test 3

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.Pangaea split into two parts called:

   • A.North America and South America
   • B.Laurasia and Gondwanaland✓ Correct Answer
   • C.Europe and Africa
   • D.Asia and Australia

   Explanation: Pangaea split into northern Laurasia (Angaraland) and southern Gondwanaland.

2. Q2.India was a part of which ancient landmass?

   • A.Laurasia
   • B.Gondwanaland✓ Correct Answer
   • C.Angaraland
   • D.Eurasia

   Explanation: India, along with Australia, Africa, South America, and Antarctica, was part of Gondwanaland.

3. Q3.The sea situated between Laurasia and Gondwanaland was:

   • A.Tethys Sea✓ Correct Answer
   • B.Red Sea
   • C.Mediterranean Sea
   • D.Caspian Sea

   Explanation: The Tethys Sea separated the two landmasses.

4. Q4.Who proposed the 'Sea Floor Spreading' theory?

   • A.Alfred Wegener
   • B.Harry Hess✓ Correct Answer
   • C.McKenzie
   • D.Parker

   Explanation: Harry Hess proposed the theory of Sea Floor Spreading in 1960.

5. Q5.The concept of 'Plate Tectonics' became prominent in:

   • A.1912
   • B.1967✓ Correct Answer
   • C.1990
   • D.1850

   Explanation: Plate Tectonics was established as a unified theory around 1967 (McKenzie, Parker, Morgan).

6. Q6.Which of the following is a Major Plate?

   • A.Nazca Plate
   • B.Pacific Plate✓ Correct Answer
   • C.Arabian Plate
   • D.Philippine Plate

   Explanation: The Pacific Plate is the largest major tectonic plate.

7. Q7.The movement of plates is caused by:

   • A.Rotation of Earth
   • B.Convection currents in the Mantle✓ Correct Answer
   • C.Gravitational force
   • D.Ocean tides

   Explanation: Thermal convection currents in the magma (asthenosphere) drive plate movement.

8. Q8.When two plates move towards each other, it is called a:

   • A.Divergent Boundary
   • B.Convergent Boundary✓ Correct Answer
   • C.Transform Boundary
   • D.Constructive Boundary

   Explanation: Convergent boundaries occur where plates collide.

9. Q9.Mid-Atlantic Ridge is an example of:

   • A.Convergent Boundary
   • B.Divergent Boundary✓ Correct Answer
   • C.Transform Boundary
   • D.Subduction Zone

   Explanation: It is a divergent boundary where plates move apart, creating new crust.

10. Q10.The Himalayas were formed at which type of plate boundary?

    • A.Ocean-Ocean Convergence
    • B.Continent-Continent Convergence✓ Correct Answer
    • C.Divergent
    • D.Transform

    Explanation: Himalayas resulted from the collision of the Indian (continental) and Eurasian (continental) plates.

11. Q11.What is the 'Ring of Fire'?

    • A.Belt of volcanoes in the Atlantic
    • B.Belt of volcanoes and earthquakes around the Pacific✓ Correct Answer
    • C.Forest fire zone
    • D.Hot desert belt

    Explanation: It is the circum-Pacific belt active with volcanoes and earthquakes.

12. Q12.The molten rock material inside the earth is called:

    • A.Lava
    • B.Magma✓ Correct Answer
    • C.Ash
    • D.Cinder

    Explanation: It is called Magma when underground and Lava when it erupts onto the surface.

13. Q13.The release of gases from the interior of the earth is known as:

    • A.Ionization
    • B.Degassing✓ Correct Answer
    • C.Condensation
    • D.Evaporation

    Explanation: Degassing is the process responsible for the formation of the early atmosphere.

14. Q14.Water on Earth originated primarily from:

    • A.Chemical reaction in air
    • B.Comets and meteorites
    • C.Volcanic outgassing
    • D.Both 2 and 3✓ Correct Answer

    Explanation: Water came from volcanic degassing and icy comets/meteoroids impacting Earth.

15. Q15.Life on Earth appeared approximately how many years ago?

    • A.4.6 billion years
    • B.3.8 billion years✓ Correct Answer
    • C.1 billion years
    • D.500 million years

    Explanation: Life is estimated to have begun around 3.5 to 3.8 billion years ago.

16. Q16.The process of Photosynthesis contributed to:

    • A.Cooling the earth
    • B.Formation of Core
    • C.Accumulation of Oxygen in atmosphere✓ Correct Answer
    • D.Formation of Moon

    Explanation: Photosynthesis by early cyanobacteria released oxygen, transforming the atmosphere (Great Oxidation Event).

17. Q17.Fossils are found in which type of rocks?

    • A.Igneous
    • B.Sedimentary✓ Correct Answer
    • C.Metamorphic
    • D.Granite

    Explanation: Fossils are preserved in sedimentary rocks where layers accumulate.

18. Q18.Which waves provide information about the interior of the Earth?

    • A.Sound waves
    • B.Seismic waves✓ Correct Answer
    • C.Light waves
    • D.Radio waves

    Explanation: Seismic waves (P and S waves) generated by earthquakes help map the interior.

19. Q19.Which seismic waves cannot travel through liquid?

    • A.P-waves
    • B.S-waves✓ Correct Answer
    • C.L-waves
    • D.All of them

    Explanation: S-waves (Secondary waves) cannot pass through liquids, proving the Outer Core is liquid.

20. Q20.Which is the fastest seismic wave?

    • A.P-waves✓ Correct Answer
    • B.S-waves
    • C.Surface waves
    • D.Rayleigh waves

    Explanation: P-waves (Primary waves) arrive first and travel fastest.