Earthly Basics
These vast bodies of water cover approximately 70% of Earth’s crust and are all connected.
What are oceans?
In a scientific experiment, this variable is the factor being altered by the researcher and is plotted on the x-axis.
What is the independent variable
The World Bank classifies countries with a GNI per capita of more than $13,205 as this category.
What is a High-Income Country (HIC)
According to the 10% rule, this is the amount of energy that is not passed to the next trophic level, but instead lost as heat or waste.
What is 90%
This core principle involves meeting the needs of the present without compromising the ability of future generations to meet their own.
What is sustainability
This layer of the atmosphere is known as the "weather zone" because it is where clouds and storms form.
What is the troposphere?
This statistical tool uses the capture-mark-recapture technique to estimate the size of a mobile population
What is the Lincoln Index
A population pyramid with a wide base and concave sides, indicating high birth and death rates, is typical of this country group.
What is a Low-Income Country (LIC)
This global agreement protects over 35,000 species of animals and plants from the threats of international trade.
What is CITES
This term describes the reliable availability of energy at an affordable price while considering environmental impacts.
What is energy security
This percentage represents the amount of Earth's total water supply that is found in oceans and seas as salt water.
What is 97.5%
This type of sampling is used when there is a gradual change across a habitat, such as from a forest edge to its center.
What is a belt transect (or systematic sampling)?
This ratio measures the dependent portion of a population (ages 0–14 and 65+) compared to the economically active workforce (ages 15–64).
What is the dependency ratio
This biological process occurs when a community changes from a simple to a complex community on newly formed land with no previous soil.
What is primary succession
This landmark international agreement was signed to phase out CFCs and other substances that deplete the stratosphere.
What is the Montreal Protocol
This specific temperature marks the point at which water vapor in the air begins to condense into liquid droplets.
What is the dew point
This term refers to numerical data, such as measurements of rainfall or temperature, that can be analyzed using statistics.
What is quantitative data
This type of national policy encourages couples to have children to combat a shrinking or aging population.
What is a pronatalist policy
This conservation model includes a strictly protected core area, a buffer zone for research, and a transition area for sustainable human activity.
What is the Biosphere Reserve Model
This geo-engineering strategy involves spraying particles into the atmosphere to mimic the cooling effect of volcanic eruptions.
What are stratospheric aerosols
This reservoir contains approximately 68.7% of Earth's total freshwater supply.
What are ice sheets and glaciers
This index calculates biodiversity on a scale of 0 to 1, with 1 representing very high diversity.
What is Simpson’s Index
This organization advocates for sustainable development and produced the influential "Limits to Growth" report in 1972.
What is the Club of Rome
This term describes a species that is found in only one specific geographic location and nowhere else on Earth.
What is an endemic species
This waste disposal method can produce heat and electricity but is criticized for releasing toxic gases and greenhouse emissions.
What is incineration