Earth Science Trivia Questions and Answers

25 questions on Earth Science, each with the answer and a short explanation. Part of the Science set in Rapid Fire Trivia, which holds 2,000 questions across 5 topics.

All 25 questions, with answers

1. 1Water falling from clouds as rain, snow, or hail is called what?

   AnswerPrecipitation

   Precipitation returns condensed atmospheric water to Earth’s surface in several liquid or frozen forms.

2. 2Which rock type commonly forms in visible layers from accumulated sediment?

   AnswerSedimentary rock

   Sedimentary rocks form as deposited particles or chemical materials become compacted and cemented together.

3. 3What slope deposit consists of loose angular rock fragments accumulated below a cliff?

   AnswerTalus

   Weathered fragments fall under gravity and collect as a steep apron, also called scree.

4. 4Which term describes precipitation that evaporates before reaching the ground?

   AnswerVirga

   Virga appears as streaks below clouds when falling rain or snow enters sufficiently dry air.

5. 5What term describes ground that remains frozen for at least two consecutive years?

   AnswerPermafrost

   Permafrost occurs widely at high latitudes and can contain soil, rock, and ground ice.

6. 6Which narrow rotating funnel can extend from a thunderstorm to the ground?

   AnswerTornado

   A tornado is a violently rotating column of air connected to a convective storm.

7. 7Which coastal opening forms when waves cut completely through a rocky headland?

   AnswerSea arch

   Continued erosion along fractures can connect caves from opposite sides of a headland.

8. 8Which weather condition forms when tiny water droplets near the ground reduce visibility?

   AnswerFog

   Fog is essentially a cloud whose suspended droplets form at ground level.

9. 9Which compass direction does the Sun appear to rise from most days?

   AnswerEast

   Earth’s eastward rotation makes the Sun appear to rise in the eastern sky.

10. 10Moving weathered material to a new location is called what?

    AnswerErosion

    Erosion transports loosened material through water, wind, ice, or gravity after weathering breaks it down.

11. 11Approximately what fraction of Earth’s surface is covered by ocean?

    AnswerAbout 71 percent

    The global ocean covers a little over seven-tenths of Earth’s surface and dominates its climate system.

12. 12Which mineral is the main ingredient in limestone?

    AnswerCalcite

    Most limestone consists largely of calcium carbonate in the mineral calcite within Earth’s natural systems.

13. 13Which frozen precipitation consists of layered balls of ice from thunderstorms?

    AnswerHail

    Strong updrafts repeatedly lift ice through supercooled water before hailstones fall within Earth’s natural systems.

14. 14Where does hail normally form?

    AnswerInside strong thunderstorm clouds

    Powerful updrafts carry ice through supercooled water, building layered hailstones before they fall.

15. 15What isolated pillar of coastal rock can remain after waves erode a headland?

    AnswerSea stack

    Wave erosion can enlarge caves into arches and eventually leave a detached column offshore.

16. 16Which instrument measures wind speed?

    AnswerAnemometer

    Cup, propeller, and sonic anemometers measure air movement using different physical methods.

17. 17What process carries loose material downhill under gravity without a transporting river or glacier?

    AnswerMass wasting

    Landslides, rockfalls, and soil creep are forms of gravity-driven mass wasting over slopes and cliffs.

18. 18Which natural opening allows groundwater to flow out at Earth’s surface?

    AnswerSpring

    A spring forms where the water table intersects the ground or pressure forces water outward.

19. 19Which landform rises high above surrounding terrain and usually has steep slopes?

    AnswerMountain

    Mountains form through uplift, folding, faulting, volcanism, or combinations of these processes.

20. 20Preserved remains or traces of ancient life are called what?

    AnswerFossils

    Fossils include bones, shells, footprints, burrows, and chemical evidence left by past organisms.

21. 21Which dark organic component of soil forms from decomposed plant and animal material?

    AnswerHumus

    Humus improves soil structure, nutrient retention, biological activity, and the soil’s ability to hold water.

22. 22What process carries water downward from the ground surface into soil?

    AnswerInfiltration

    Infiltration begins groundwater recharge as water enters pores in soil and rock.

23. 23Which gas makes up most of Earth’s atmosphere by volume?

    AnswerNitrogen

    Nitrogen accounts for roughly 78 percent of dry air near Earth’s surface.

24. 24Convection within which broad Earth layer helps drive tectonic plate motion?

    AnswerMantle

    Slow mantle circulation transfers heat and contributes to forces moving the plates above.

25. 25Which atmospheric gas is essential for most human respiration?

    AnswerOxygen

    Oxygen supports aerobic cellular respiration, releasing usable energy from food molecules inside cells.