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Quiz Chapter 9: Earth

10 questions · Form 1 Science Bab 9: Earth

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which sphere of the Earth encompasses all living organisms, including plants, animals, and microorganisms?

  1. Atmosphere
  2. Hydrosphere
  3. Biosphere
  4. Geosphere
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Answer: C

The Biosphere is the global ecological system integrating all living beings and their relationships.

2. Which geological process involves the movement and deposition of eroded rock materials by wind, water, or ice?

  1. Transport and Deposition
  2. Metamorphism
  3. Magma Intrusions
  4. Radioactive Decay
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Answer: A

Eroded materials are carried (transported) by agents like rivers and wind before settling (deposition) elsewhere.

3. What atmospheric layer contains the ozone layer that absorbs harmful ultraviolet (UV) radiation from the sun?

  1. Troposphere
  2. Stratosphere
  3. Mesosphere
  4. Exosphere
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Answer: B

The Stratosphere contains high concentrations of ozone ($O_3$) that shield Earth from solar UV radiation.

4. In which atmospheric layer do meteors burn up upon entering Earth's atmosphere due to friction?

  1. Troposphere
  2. Mesosphere
  3. Thermosphere
  4. Exosphere
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Answer: B

The Mesosphere is the middle atmospheric layer where friction causes most meteoroids to burn up.

5. Why are fossils predominantly found in Sedimentary rocks rather than Igneous rocks?

  1. Sedimentary rocks form under high heat that preserves bones
  2. Igneous rocks form from high-temperature molten rock that melts organic remains
  3. Sedimentary rocks only form deep inside Earth's core
  4. Igneous rocks are too soft to hold fossils
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Answer: B

Extremely high temperatures of liquid magma during Igneous rock formation destroy organic remains, whereas Sedimentary rocks accumulate gently over time.

6. Which rock type is formed from the cooling and solidification of molten magma or lava?

  1. Sedimentary Rock
  2. Metamorphic Rock
  3. Igneous Rock
  4. Fossiliferous Rock
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Answer: C

Igneous rocks (like granite and basalt) form when magma inside Earth or lava on the surface cools and crystallizes.

7. How old is the Earth estimated to be based on radiometric dating of meteorites and ancient rocks?

  1. 1 million years
  2. 100 million years
  3. 2.5 billion years
  4. 4.5 billion years
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Answer: D

Geological evidence and radiometric dating estimate the Earth's age to be approximately 4.5 to 4.6 billion years.

8. Hydrothermal vents on the ocean floor release rich mineral fluids heated by what energy source?

  1. Solar light energy
  2. Geothermal heat energy
  3. Wind power
  4. Atmospheric pressure
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Answer: B

Hydrothermal vents are heated geothermally by underlying magma beneath the oceanic crust.

9. What happens during the process of weathering?

  1. Rocks are transported by river currents to the ocean
  2. Rocks are broken down into smaller fragments by physical, chemical, or biological agents
  3. Rock fragments settle and compress at the bottom of lakes
  4. Liquid lava cools on Earth's surface
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Answer: B

Weathering is the in-situ breakdown of rocks into smaller particles by rain, temperature changes, or organisms.

10. What drives the movement of tectonic plates in Earth's crust according to endogenic theory?

  1. Solar radiation on the crust
  2. Convection currents in the mantle
  3. Gravitational pull of the moon
  4. Oceanic surface tides
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Answer: B

Thermal convection currents in the semi-fluid asthenosphere/mantle drag tectonic plates along the surface.

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