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Example Questions
Example Question #53 : Ecology
Which of the following best describes the overall impact of humans on the nitrogen cycle?
Depletion of nitrogen
Sequestered nitrogen
Increase in nitrogen
Slight decrease in nitrogen
Increase in nitrogen
Human activities such as chemical fertilizers, industrialization, and pollution significantly increase the amount of nitrogen that is biologically available in an ecosystem.
Example Question #52 : Ecology
Beyond bacteria, which of the following acts as an alternative method for nitrogen fixation?
Roots
Earthquake
Fertilizers
Lightening strike
Lightening strike
An alternative method of nitrogen fixation is a lightening strike; however, this is rare and soil-dwelling bacteria perform most of the Earth’s nitrogen fixation.
Example Question #53 : Ecology
Which of the following best represent stages of the water cycle?
Precipitation
Condensation
All of these
Evaporation
All of these
The correct answer is “all of these.” The water cycle can be broken down to three stages. The three stages of the water cycle are evaporation, condensation, and precipitation.
Example Question #54 : Ecology
Water exists in which of the following states of matter during the water cycle?
Solid, liquid, and gas
Gas and liquid
Solid and gas
Only solid
Solid, liquid, and gas
During the water cycle, water can take three forms: liquid, solid, and gas.
Example Question #22 : Understanding Eco Chemical Cycles
Which of the following is true regarding water on Earth?
The amount of water on Earth is far from constant
Water is sequestered in reserves
Climate has no impact on the water cycle
Water exists in two forms on Earth: solid and liquid
Water is sequestered in reserves
The water cycle describes the movement of water on Earth. The amount of water is relatively constant; however, it is subject to fluctuations based on climatic conditions. Water exists in three forms in the water cycle: solid, liquid, and gas. On Earth, water is sequestered in different reserves including ice, oceans, and the atmosphere.
Example Question #31 : Understanding Eco Chemical Cycles
Which of the following is required for water to change states within the water cycle?
Energy exchange
Ionization
Hydrolysis
None of these
Energy exchange
Energy is needed for water to enter different stages of the water cycle (condensation, precipitation, and evaporation). This leads to a change in temperature.
Example Question #61 : Ecology
Which of the following describes the precipitation stage of the water cycle?
Flow of water from surface into the ground
Condensed water vapor falling to Earth
Conversion of liquid water to gaseous water
Runoff produced by melting snow
Condensed water vapor falling to Earth
The precipitation stage of the water cycle is when condensed water vapor falls to Earth. Precipitation exists in various forms that include rain, snow, and hail.
Example Question #31 : Understanding Eco Chemical Cycles
Which of the following is not a type of precipitation?
Runoff
Rain
Sleet
Snow
Runoff
Precipitation is when condensed water vapor falls to Earth. Common types of precipitation include rain, sleet, and snow. In contrast, runoff is water flow across the Earth’s surface.
Example Question #31 : Understanding Eco Chemical Cycles
Which of the following impedes the precipitation stage of the water cycle?
Snowmelt
Interception
Infiltration
Runoff
Interception
In the precipitation stage of the water cycle, condensed water vapor falls to the Earth’s surface; however, a tree canopy, for instance, may block this precipitation, preventing the precipitation from reaching the Earth’s surface. The intercepted precipitation then evaporates back into the Earth’s atmosphere.
Example Question #61 : Ecology
Which of the following is an impact of snow precipitation?
Transpiration
Advection
Canopy interference
Snowmelt
Snowmelt
Snowmelt is a type of runoff that results from melting snow.
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