Lesson 1.2.1
1.2.1 How important are water and carbon to life on Earth? Quiz: OCR Geography, Unit 2
20 questions
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Lesson 1.2.1, How important are water and carbon to life on Earth?: 20 multiple choice questions for the OCR Geography (H481), Unit 2: Earth's Life Support Systems, written with Revision Ninja.
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The 20 questions
-
What type of system is the Earth's hydrological cycle on a global scale?
- Cascading system
- Isolated system
- Open system
- Closed system
-
Which carbon store contains the vast majority of Earth's total carbon?
- Terrestrial biosphere
- Sedimentary rocks
- Atmosphere
- Oceans
-
What proportion of Earth's total water is stored in the oceans?
- 50 per cent
- 70 per cent
- 97 per cent
- 85 per cent
-
Which process describes the loss of ice and snow from a glacier through melting?
- Accumulation
- Sublimation
- Ablation
- Percolation
-
What is the main gas released into the atmosphere during terrestrial plant respiration?
- Oxygen
- Carbon dioxide
- Water vapour
- Methane
-
Which process transfers water directly from plant leaves into the atmosphere as vapour?
- Evaporation
- Percolation
- Infiltration
- Transpiration
-
Which form of chemical weathering specifically involves atmospheric carbon dioxide dissolved in rainwater?
- Hydrolysis
- Chelation
- Carbonation
- Oxidation
-
What term describes water held on the leaves and stems of vegetation after precipitation?
- Surface store
- Throughfall
- Interception store
- Stemflow
-
Heavy rain falls on saturated ground, preventing infiltration. Which pathway will water predominantly follow?
- Percolation
- Throughflow
- Overland flow
- Groundwater flow
-
Sunlight triggers green plants to absorb atmospheric carbon dioxide. Which carbon process is occurring?
- Respiration
- Combustion
- Decomposition
- Photosynthesis
-
A forest fire burns trees rapidly, releasing stored carbon into the atmosphere. What process is this?
- Decomposition
- Combustion
- Weathering
- Sequestration
-
Water moves vertically downwards from the soil layer deep into the underlying permeable rock. What process is this?
- Stemflow
- Throughflow
- Percolation
- Infiltration
-
Dead plant material breaks down, transferring carbon from biomass into soil organic matter. Which process drives this?
- Decomposition
- Combustion
- Respiration
- Nitrification
-
Rainwater flows horizontally through unsaturated soil towards a river channel. What hydrological flow is occurring?
- Throughflow
- Percolation
- Baseflow
- Overland flow
-
Phytoplankton in the ocean surface absorb dissolved carbon dioxide. Which ocean carbon pump is operating?
- Physical pump
- Solubility pump
- Carbonate pump
- Biological pump
-
Water drops form on cold grass overnight as air cools to its dew point. Which process occurs?
- Sublimation
- Condensation
- Transpiration
- Evaporation
-
Which freshwater store contains the largest volume of liquid freshwater on Earth?
- Groundwater
- Rivers
- Lakes
- Atmosphere
-
In a localized drainage basin, why is the water cycle classified as an open system?
- Closed boundary
- Zero losses
- Inputs and outputs
- Static storage
-
Dissolved carbon dioxide in cold ocean water sinks in high latitudes. Which pump powers this transfer?
- Biological pump
- Solubility pump
- Carbonate pump
- Terrestrial pump
-
Which carbon store has the fastest turnover rate, exchanging carbon over days to years?
- Sedimentary rock store
- Deep ocean store
- Fossil fuel store
- Atmospheric store
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