test on 12/21 Flashcards
(23 cards)
density
population size/ individuals per area
Ecology
the study of interactions between organisms and their biotic and abiotic environments.
biotic
living things
abiotic
non-living things
is soil biotic or abiotic?
Soil contains sand and rocks,
which are abiotic, but it also
contains a community of living
micro-organisms!
hierarchy of life
atom, molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biome, biosphere
autotroph
an organism capable of capturing energy from the sun (or chemicals) and using it to produce its own food.
Heterotroph:
an organism that gets food
from eating other living things.
inputs of photosynthesis
carbon dioxide, light energy, water
outputs of photosynthesis
sugar, oxygen
Trophic level:
a step in a food chain or food web.
10%
Only a small fraction of the energy from one trophic
level makes it to the next level up.
biomass
the total amount of living tissue within a given trophic level
Exponential growth:
when the larger the population gets, the
more quickly it grows. (j curve)
Density-dependent factors:
limits to population size that
depend on the density of the population.
density independent factors
limits to population size that do
not depend on the density of the population.
carrying capacity
the maximum number of individuals that an environment can support. (S curve)
the different biomes
- Freshwater/ Freshwater wetlands
- Marine
- Coral reef
- Estuaries
- Tundra
- Rainforest
- Savanna
- Taiga
- Temperate forest/Temperate grassland
- Desert
convection
movement of heat through fluids and gasses
conductor
movement of heat through a direct object
radiation
movement of heat through electromagnetic waves
conductor
good at heat transfer
insulator
bad at heat transfer
