Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

37 Cards in this Set

  • Front
  • Back
the part of Earth that supports life, including the top portion of Earth's crust, all the waters that cover Earth's surface, and the surrounding atmosphere
all the organisms living in an area and the nonliving features of their environment
the study of interactions that occur among organisms and their environment
all the organisms in an ecosystem that belong to the same species
all the populations in an ecosystem
the place in which an organism lives
takes place when more than one organism seeks the same resource at the same time. Competition limits population size.
limiting factor
anything that restricts the number of individuals in a population
carrying capacity
the largest number of individuals of one species that an ecosystem can support over time
an organism that uses an outside energy source, such as the Sun to make energy-rich molecules
an organism that cannot make its own energy-rich molecules
plant eater
animal that eats other animals
animal that eats plants and other animals
consumes waste and dead organisms
food chain
a simple model of the feeding relationships in an ecosystem
population density
the size of a population in a specific area
biotic potential
the highest rate at which a population would grow under ideal conditions (if no limiting factors restricted the growth of a population)
any close relationship between species
a symbiotic relationship in which both species benefit
a symbiotic relationship in which one organism benefits and the other is not affected
a symbiotic relationship in which one organism benefits but the other is harmed
how an organism survives, how it obtains food and shelter, how it finds a mate and cares for its young, and how it avoids danger (special adaptations may be part of an organism's niche)
a consumer that captures and eats other consumers
an organism captured by a predator
Living Earth relationship

Each organism lives in a habtitat. All of the organisms of the same species in an ecosystem make up a population. All the populations in an ecosystem make up a community. All of the communities, and the non-living features of their environment make up an ecosystem.
Elements affecting population size
limiting factors, carrying capacity, biotic potential, birth & death rates, movement
Predator/Prey relationship
Predator captures and eats prey. The presence of predators usually increases number of species that can live in an ecosystem by limiting size of prey populations, so that more food and other resources are available, reducing competition between species. (Rabbit/Fox lab)
a habitat must provide ...
food, shelter, temperature and moisture (eg. trees are woodpecker's hospital)
competition's effect on population
limits size
competition most intense
between members of same species
population size indicates...
whether population is healthy and growing
How to measure the size of a population
1. trap, mark & measure
2. sample count
elements that effect population size
1. limiting factors
2. carrying capacity
3. biotic potential
4. birth & death rates
5. movement of organisms into or out of an area
exponential growth
the larger a population becomes, the faster it grows
process used by producers which use the Sun and contain chlorophyll
process used by producers found near volcanic vents on ocean floor, which use mineral molecules as an energy source