Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and atmosphere.
Biosphere
100
Process in which chemical energy is used to produce carbohydrates?
Chemosynthesis
100
What´s a food chain?
Series of steps in which organisms transfer energy bye eating and being eaten.
100
Which cycles are powered by the flow of energy?
Biogeochemical cycles
100
What is the original source of energy in most ecosystems?
Sunlight.
200
A scientific study of interactions among organisms and their physical environment.
Ecology
200
What are primary producers?
The first producers of energy-rich compound that are later used by other organisms.
200
What´s a food web?
Network of all the food chains in an ecosystem.
200
What are nutrients for?
To build tissues and carry out life functions.
200
Which organism feeds only from plants?
Herbivore.
300
What are some biotic factors?
Animals, plants, mushrooms, and bacteria.
300
Process that captures light energy and uses it to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches?
Photosynthesis
300
Define trophic level.
Each step in a food chain or food web.
300
How is the nutrient whose supply limits productivity called?
Limiting Nutrient.
300
Which organisms obtain nutrients by breaking down dead and decaying plants and animals?
Decomposers.
400
Name 6 abiotic factors.
Sunlight, heat, precipitation, humidity, wind or water currents, soil type, etc.
400
What are autotrophs?
Organism that captures energy from sunlight or chemicals and convert it into forms that living cells can use.
400
What shows the relative amount of energy or matter?
The Ecological pyramid
400
Define denitrification.
When bacteria obtain energy from energy by converting nitrates into nitrogen gas, which is released into the atmosphere.
400
A snake that eats a frog that has eaten an insect that fed on a plant is a…
Third-level consumer.
500
What are the 3 methods used in ecological studies today?
a. Observation
b. Experimentation
c. Modeling
500
Define the word 'consumers'.
Organisms that rely on other organisms for energy and nutrients.
500
What are the 3 types of pyramids?
a. Pyramids of energy
b. Pyramids of biomass
c. Pyramid of numbers
500
The Phosphorous cycle forms part of which vital molecules?
DNA & RNA.
500
Only 10% pf the energy stored in an organism can be passed to the next trophic level. Some other is used for the organism´s life processes. What happens to the rest?