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Exam Review 1/2011

Mrs. Vaughan's 7th Grade Science First Semester Exam Review

The part of the experiment you change on purpose. Independent Variable
The part of the experiment that you measure. Dependent Variable
The parts of the experiment you don't change. Constants
The baseline or group that you compare the results of your experiment to. Control
A measurement using numbers. Quantitative Observations
A description of something, without using numbers. Qualitative Observations
The number of times you repeat an experiment with the same variable. Repeated Trials
The proper format for a hypothesis. An "if...then" statement.
The proper format for a title. "The Effect of the IV on the DV"
What is the basic unit of life? The cell
The organelle that controls all functions of the cell--the "control center" of the cell. Nucleus
The organelle that is the "powerhouse" of the cell. Mitochondria
A cell that does NOT contain a nucleus. Prokaryote
A cell that DOES contain a nucleus. Eukaryote
All of the living AND nonliving things in one area at one time. Ecosystem
Living parts of an ecosystem. Biotic Factors
Nonliving parts of an ecosystem. Abiotic Factors
An organism that produces its own food. Producer
Another word for a producer. Autotroph
An organism that consumes other organims for energy. Heterotroph
An organism that breaks down dead and decaying organisms. Decomposer
An organism that feeds on the remains of dead organisms. Scavenger
An organism's role in its environment or how it makes its living. Niche
One single organism Individual
A group of two or more organisms of the same species living in the same place at the same time. Population
A group of one or more different species living in the same place at the same time. Community
The place where an organims lives and that provides the things an organism needs. Habitat
At which level is there the most available energy in an energy pyramid? Producer Level
What are the producers in Mono Lake? Algae
Consumers that eat only plants. Primary Consumers
Consumers that eat primary consumers. Secondary Consumers
Consumers that eat secondary consumers. Tertiary Consumers
A consumer that eats both plants and animals. Omnivore
A consumer that eats only plants. Herbivore
A consumer that eats only meat. Carnivore
When a scientist actually looks and counts the organisms. Direct Observation
When a scientist counts tracks, nests, holes, etc. and estimates the number of organisms. Indirect Observation
When a scientist counts the number of organisms in a small fraction of the area and multiplies to estimate the total number. Sampling
How populations increase Birth or Immigration
How populations decrease Death or Emigration
A factor in an environment that prevents a population from increasing indefinitely. Limiting Factor
The struggle for organisms to survive in their environment when there is not enough food, water, or shelter. Competition
An interaction where one organism kills and eats another. Predation
The organism that does the killing in a predation relationship. Predator
The organism that is killed in a predation relationship. Prey
An interaction between two organisms in which at least one organism benefits. Symbiosis
A relationship in which one species benefits and the other species is neither helped nor harmed. Commensalism
An interaction between two species where both species benefit. Mutualism
An interaction where an organism lives on or in another organism and harms it but does not kill it. Parasitism
The organism which is living on or in another organism. Parasite
The organism that the parasite is living on or in. Host
A structure, function, or behavior that helps an organism to survive in its environment and reproduce. Adaptation
Physical feature of an organism that helps it to survive. Structural Adaptation
An organism's abiltiy to do somethin that helps it to survive in its environment. Functional Adaptation
The things an organism does to survive. Behavioral Adaptation
Organisms that belnd in well are better adapted for survival in that environment than organisms that are a different color. (Camouflage) Protective Coloration
A defenseless animal or plant looks like another animal or plant with qualities that cause predators to avoid it. Mimicry
A term for animals that have one body part that mimics another to increase survival during an attack. Self-Mimicry
Any GENERAL structure, charactristic or behavior of an organism. Feature
The SPECIFIC expression of a feature in an individual. Trait
The naming system for organisms in which each organism is given a two-part name--a genus and species name. Binomial Nomenclature
A series of paired statements that describe the physical characteristics of different organisms. Dichotomous Key
The scientific study of how living things are classified. Taxonomy
Created by: mountaingirl38