Origin and Evolution of Earth - Practice Test 5

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

1. Q1.The Andes Mountains were formed by the subduction of:

   • A.Nazca Plate under South American Plate✓ Correct Answer
   • B.Pacific under Asian
   • C.Indian under Eurasian
   • D.African under European

   Explanation: The Andes are formed by the Nazca oceanic plate subducting beneath the South American continental plate.

2. Q2.The San Andreas Fault is an example of:

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

   Explanation: It is a transform fault where the Pacific and North American plates slide past each other.

3. Q3.Which period is called the 'Age of Coal'?

   • A.Carboniferous✓ Correct Answer
   • B.Permian
   • C.Jurassic
   • D.Devonian

   Explanation: The Carboniferous period had extensive coal-forming swamps.

4. Q4.The extinction of trilobites occurred at the end of:

   • A.Permian✓ Correct Answer
   • B.Cambrian
   • C.Cretaceous
   • D.Silurian

   Explanation: The Permian-Triassic extinction event wiped out trilobites.

5. Q5.Which of these is the oldest Era?

   • A.Precambrian✓ Correct Answer
   • B.Paleozoic
   • C.Mesozoic
   • D.Cenozoic

   Explanation: Precambrian is actually a Supereon/time span, encompassing the oldest eras (Archean, Proterozoic).

6. Q6.The 'Iron Catastrophe' refers to:

   • A.Sinking of iron to Earth's core✓ Correct Answer
   • B.Meteor shower
   • C.Volcanic eruption
   • D.Rusting of surface

   Explanation: It refers to the geological event where heavy iron sank to the center to form the core.

7. Q7.Continental Crust is also known as:

   • A.Sial✓ Correct Answer
   • B.Sima
   • C.Nife
   • D.Mantle

   Explanation: Continental crust is felsic (Si + Al), hence Sial.

8. Q8.Oceanic Crust is also known as:

   • A.Sima✓ Correct Answer
   • B.Sial
   • C.Nife
   • D.Asthenosphere

   Explanation: Oceanic crust is mafic (Si + Ma), hence Sima.

9. Q9.Which epoch is known as the 'Age of Man'?

   • A.Holocene✓ Correct Answer
   • B.Pleistocene
   • C.Pliocene
   • D.Miocene

   Explanation: The Holocene allows for the growth of human civilization.

10. Q10.The study of the age of rocks is called:

    • A.Geochronology✓ Correct Answer
    • B.Petrology
    • C.Lithology
    • D.Paleontology

    Explanation: Geochronology is the science of dating rock formations.

11. Q11.Which radioactive element is commonly used to date the age of the Earth?

    • A.Uranium✓ Correct Answer
    • B.Carbon-14
    • C.Potassium
    • D.Radon

    Explanation: Uranium-Lead dating is used for old rocks and Earth's age. Carbon-14 is for recent organic remains.

12. Q12.The inner core is solid due to:

    • A.High Pressure✓ Correct Answer
    • B.High Temperature
    • C.Composition
    • D.Magnetism

    Explanation: Despite high temperature, immense pressure keeps the inner core solid.

13. Q13.The movement of the Earth's plates is driven by heat from:

    • A.Radioactive decay in the mantle/core✓ Correct Answer
    • B.Solar energy
    • C.Friction of rotation
    • D.Ocean currents

    Explanation: Internal heat from radioactive decay creates convection currents.

14. Q14.The boundary where new crust is generated is:

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

    Explanation: New crust forms at divergent boundaries (e.g., mid-ocean ridges).

15. Q15.The boundary where crust is destroyed/recycled is:

    • A.Convergent (Subduction)✓ Correct Answer
    • B.Divergent
    • C.Transform
    • D.Passive

    Explanation: Crust is destroyed at subduction zones (convergent boundaries).

16. Q16.Who is known as the 'Father of Continental Drift'?

    • A.Alfred Wegener✓ Correct Answer
    • B.Harry Hess
    • C.Charles Darwin
    • D.Einstein

    Explanation: Alfred Wegener formulated the theory.

17. Q17.Which supercontinent existed in the Southern Hemisphere?

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

    Explanation: Gondwanaland was the southern supercontinent.

18. Q18.Which mountain range separates Europe and Asia, formed by collision?

    • A.Ural Mountains✓ Correct Answer
    • B.Himalayas
    • C.Andes
    • D.Rockies

    Explanation: The Ural Mountains formed by the collision of continents, creating Laurasia.

19. Q19.The earliest life forms on Earth were:

    • A.Microbes/Bacteria✓ Correct Answer
    • B.Fish
    • C.Reptiles
    • D.Plants

    Explanation: Single-celled microbes (prokaryotes) were the first life forms.

20. Q20.The evolution of the atmosphere from primordial to present is called:

    • A.Atmospheric Evolution✓ Correct Answer
    • B.Degassing and Differentiation
    • C.Oxidation
    • D.Precipitation

    Explanation: It involves the transition from H/He to N/O2 rich atmosphere.