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48 Cards in this Set

  • Front
  • Back
Name each steps of Scientific Methods
Observations, Form a question, make a hypothesis, design an experiment, Analyze results and make conclusions.
An explanations for a problem that can be formally tested through experimentations.
Developed through obserrvations or previou experiments.
Usually an if/then statements.
Designing an experiment
Test a hypothesis by collecting information under controlled conditions.
Controll group
all conditions kept normal
Experimental group
All conditions kept the same as the controll except for the single condition being tested.
Independent Variables
Condition that is changed: affects the out come
Dependent variables
Changes in this condtion depends on changes in the independent variables.
Written descriptions
Circular graphs
Use to show portions at a whole, how a specific froup fits into a large group.
bar Graphy
Shows relationships between groups when they do not affect each others
Line Graphy
Used to show continuing data or how one variables affects another
Data lends suppoort for or agains the hypothesis.
Hypothesiss that is supported overtime by many investigations
Facts of nature generally know to be true
Metric System
based on Measurements of ?
basic units of Volume?
Basic units of Length?
basic units of Mass?
10, Litter, Metter, Gram
Amount of space an objects takes up
A measurement of the amount of matter in a object
Study of interactions of organisms and their physical environment
Organisms that live in a particular place
Physical location of community
Self Sustaining collection of organisms and their physical environment
Diversity of Ecosystem
measure of number of species living in ecosystem and how common each species is.
he ability of an ecosystem to resist change in the face of disturbances.
Carrying Capacity
The number of one species that an environment can support
LImiting Factor
Any biotic or abiotic factor that restricts the existance, numbers, or reproduction of a population
Density-dependent Factors
Have an increasing effect as the populations increases
Density-independent Factors
Affect all populations, regardless of their density
Take in energy, store in complex molecules. Includes plants, alge, and some bacteria
All other organisms which obtain energy by consuming other organisms
Special consumers obtaining energy by consuming organic wastes, dead bodies. Includes fungi and some bacteria.
Trophic Level
A group of organisms whose energy sources are the same number of steps away from the sun
1st tropic level
2nd trophic level
Organis that eat plants (herbivore( Primary Consumer
3rd Trophic Level
Animals that eat herbivores(carnivores) Secondary Consumers
4th trophic level
Animals that feed on carnivores (Teritory Consumers
Only ? of energy is passed on
All ecosystem must contain ?
Food web
A complex network of feeding relationships in ecosystem
Food Chain
Path of energy through trophic levels. One part of a food web; the specific sequence in which organisms obtain energy.
Nitrogen Cycle
Nitrogen is necessary to ?
to make proteins, nucleic acids
Nitrogen enters the food chain when plands obsorb it from soil
Bacteria play an important role in releasing nitrogen from dead organisms to be reused
Water vapor in atmosphere condenses, falls to the earth's surface as precipitation. Seeps in to soil. And becomes ground water remaining water is heated by the sun to reenter the atmospher by evaporation
Living Cycle __Water Cycle__++++_))(*^$@*$&^@
taken up by plant roots, moves into the atmosphere by transpiration (evaporation from leaves)
Carbon Cycles
Carbon dioxide in air is used by plants during photosynthesis. Consumers obtain carbon acompounds from plants, break them down by cellular respiration, and release carbon dioxide into an atmosphere.
Phosphorous Cycle
Phosphorus is needed in ATP and DNA
Usually found in soil and rocks and dissolve in water to form phosphorus ions.
Two or more species evolve in response to each other
One organisms feed on another