a system that uses the earth's layers of sedimentary rock and preserved fossils to determine major evolutionary events
What is geologic time scale
100
the change in the inherited traits in a population of organisms through successive generations.
What is evolution
100
known as a population pyramid; a graphical illustration that shows the distribution of various age groups in a human population.
What is age structure diagrams
100
energy form of the conversion of sunlight into electricity, either directly using photovoltaics , or indirectly using concentrated solar power
What is solar energy
100
Types of agriculture
What is conventional, till, sustainable and low or no till
200
states that the earth's outermost layer is made up of large and small plates that drift. The theory builds on the model of continental drift.
What is the theory of plate tectonics
200
when some individuals of a population have genetically based traits that increase their chances of survival, and their ability
to produce offspring with the same traits. (This is key to evolution.)
What is natural selection
200
a branch of ecology and environmental science that deals with characterizing the makeup, growth, and impact of populations of organisms on the environment.
What is population ecology
200
the rate at which work is performed or energy is converted
What is power
200
a large increase in crop production in developing countries achieved by the use of fertilizers, pesticides, and high-yield crop varieties that began in the 1940's.
What is the green revolution
300
the large scale movement of waters in the ocean basins. Winds drive surface circulation, and the cooling and sinking of waters in the polar regions drive deep circulation.
What is ocean circulation
300
the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems.
What is biodiversity
300
The number living organisms, or crops that a region can support without environmental degradation.
Carrying capacity is determined by density-dependent and density-independent factors
What is carrying capacity
300
states that the total amount of energy in the universe is constant. This means that all of the energy has to end up somewhere, either in the original form or in a different from
What is the 1st law of thermodynamics
300
the deliberate modification of the characteristics of an organism by manipulating its genetic material. It's used on plants to modify their tolerance to herbicides and insects.
What is genetic engineering
400
refers to reducing the usage of water and recycling of waste water for different purposes such as cleaning, manufacturing, and agricultural irrigation.
What is water conservation
400
species that play roles affecting many other organisms in an ecosystem
What is keystone species
400
Strategies for sustainability
What is family planning, improved status of women, economic growth, and limited use of resources.
400
A barrier, typically of concrete, constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity or as a water supply
What is a dam
400
the removal of a forest or stand of trees where the land is thereafter converted to a non-forest use
What is deforestation
500
The different layers of the atmosphere
What is the troposphere, stratosphere, mesosphere, thermosphere and exosphere
500
an organisms role within the community including all physical, chemical, and biological conditions an organism needs to live and reproduce.
What is ecological niche
500
The change that typically takes place, as a country develops, in the birth and death rates of its population, both of which tend eventually to fall as per capita income rises.
What is demographic transition
500
a liquid fuel obtained from coal, natural gas, oil shale, or biomass. It may also refer to fuels derived from other solids such as plastics or rubber waste.
What is synfuel
500
an artificial application of water to the soil to assist in growing crops, and maintaining landscapes