Earth Science Quiz 51 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Carbon dioxide levels are rising in the atmosphere over the past 200 years due to

Correct Answer: A) Burning fossil fuels.

2. What is a minimum number of times an experiment should be conducted?

Correct Answer: C) 3.

3. Which of the following describes a habitable Earth?

Correct Answer: A) Has a weak magnetic field.

4. The weathering of landforms depends on various factors. Which area would MOST likely have the fastest rate of chemical weathering?

Correct Answer: B) Warm and moist regions.

5. Name the major gas in the atmosphere of the Earth.

Correct Answer: A) Nitrogen.

6. What are the two types of Destructive forces?

Correct Answer: B) Weathering / Erosion.

7. The largest among the four subsystems

Correct Answer: B) Geosphere.

8. Equator is a/an ..... line around the Earth midway between the poles. It is 0-degree latitude.

Correct Answer: D) Imaginary.

9. What is the primary means through which the Sun warms Earth?

Correct Answer: D) Transfer of energy by electromagnetic waves.

10. Where is the point at which the first movement occurs during an earthquake?

Correct Answer: B) Focus.

11. The second layer of the earth goes down 1800 miles. It is called the

Correct Answer: D) Mantle.

12. A well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses.

Correct Answer: B) Theory.

13. Which is most directly responsible for building up a river delta?

Correct Answer: C) Subsidence.

14. The second softest mineral according to the Mohs scale of hardness is the

Correct Answer: D) Gypsum.

15. Oceans cover approximately ..... percent of Earth's surface.

Correct Answer: C) 70.

16. Which of the following best suits the definition of a mineral?

Correct Answer: C) Naturally occurring and crystalline.

17. Most of the stars on a Hertzsprung-Russell Diagram fall under which category?

Correct Answer: A) Main-sequence stars.

18. He proposed the Theory of Continental Drift.

Correct Answer: B) Alfred Wegener.

19. A factor in an experiment that can be changed.

Correct Answer: A) Variable.

20. ..... are formed of masses of water droplets and ice crystals.

Correct Answer: C) Clouds.