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Science 7/8 Vocab for Final
All Vocab from Science 7/8
109
Science
7th Grade
06/11/2012

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Term
Element
Definition
Pure substance that can't be separated into simpiler substances by phisical/chemical means.
Term
Compound
Definition
Pure substance composed of 2 or more elements that are chemically combuned
Term
Mixture
Definition
Combination of 2 or more substances that are not chemically combined
Term
Solvent
Definition
The substane in which a solute is being dissolved to form a solution
Term
Solute
Definition
The substance that is dissolved to form a solution
Term
Heterogeneous
Definition
A combination of substances in which different compounds are easily observed
Term
Homogeneous
Definition
A combination of substances in which the appearence and properties are the same throughout
Term
Concentrated
Definition
A measure of the amount of solute is dissolved in a solvent
Term
Dilute
Definition
A measure of the amount of solute dissolved in a solvent, but less than concentrated
Term
Saturated
Definition
A solution that can hold of the solute that it can hold at a given time
Term
Matter
Definition
anything that has mass and volume
Term
Volume
Definition
The amount of space taken up, or occupied by an object
Term
Meniscus
Definition
The curve you see at the top at a liquid suface
Term
Cubic Centimeter
Definition

Cubic= Having 3 dimensions

Centimeter= Kind ofmeasurement

Term
Mass
Definition
the amount of matter something is made of
Term
Weight
Definition
A measure of gravitational force on an object
Term
Inertia
Definition
The tendency of all objects to resist any change in motion
Term
Density
Definition
Amount of volume or matter in a given space
Term
Physical Change
Definition
A change that affected 1 ore more physical  properties of a substance
Term
Chemical Change
Definition
Occors when 1 or more substances are changed into an entirely different subsatnce with totally different properties
Term
Ectotherm
Definition
Animal whose body does not produce much heat
Term
Endotherm
Definition
Animals that control and regulate their temperate by controlling its internal heat
Term
Swim Bladder
Definition
Internal gas-filled organ that helps a bony fish stabilize its body at different water temperatures
Term
Atrium/Atrai
Definition
Each of the 2 upper chambers of the heart that recieves blood that comes into the heart
Term
Ventical
Definition
A lower chamber in the heart that pumpsblood out to the lungs and body
Term
Placenta
Definition
A "cord" that becomes a links between the developing embryo and fetus and mother
Term
Mamary Gland
Definition
The organ that produces the milk with in wich mammals feed their young
Term
Gestation Period
Definition
The length of time between fertilization and the birth of the mammal
Term
Diaphram
Definition
A large dom-shaped muscle that plays an important role in breathing
Term
Radula
Definition
A flexible ribbon of teeth in mollusks
Term
Endoskeleton
Definition
An internal skeleton
Term
Exoskeleton
Definition
An outer skeleton
Term
Molting
Definition
The process of shedding an out grown exoskeleton
Term
Metemorphasis
Definition
A process in which an animal's body under-goes dramatic changes in form during its life cycle
Term
Antennae
Definition
An appendage on the head of some animals that conatian sense organs
Term
Thorax
Definition
Mid section were wings and legs are attatched
Term
Abdomen
Definition
The hind section of an arachnid that contains its reproductive organs and pats of the digestive track; the hind section of an insect
Term
Pupa
Definition
The 2nd stage of complete metamorphasis in which an insect is enclosed in a protective covering and gradually changing into an adult
Term
Nymph
Definition
A stage in gradual metamorphasis usually resembles the adult
Term
Water Vascular System
Definition
A system of fluid filled tubes in an echinoderms body
Term
Organ
Definition
A structure in the body that is composed of different kinds of tissue
Term
Vertabrate
Definition
An animal with a backbone
Term
Invertabrate
Definition
An animal with no backbone
Term
Asymmetry
Definition
Not symmetrical
Term
Radial Symmetry
Definition
The quality of having many lines of symmetry that all pass though a center point
Term
Bilateral Symmetry
Definition
Line symmetry, quality of being divisible by 2 halves that are mirror images
Term
Cnidarian
Definition
Animals whose sting cells are used to capture their prey and defend themsevles, and who its take their food into a hollow central cavity
Term
polyp
Definition
The cnidarian body plan characterized by a raise like shape in which is usually adapted for life attached to an underwater surface
Term
Medusa
Definition
The cnidarian body plan characterizedby a bowl shape and which is adapted for a free-swimming life
Term
Regeneration
Definition
The ability of an organism to re-grow body parts
Term
Xylem
Definition
Vascular tissue though which water and nutrients move in some plants
Term
Phloem
Definition
Vascular tissue though which food move in some plants
Term
Germination
Definition
The early growth stage of trh embryo plant in a seed
Term
Cotyledon
Definition
A seed leaf that stores food
Term
Embryo
Definition
The young plant that developes from a zygote
Term
Pollination
Definition
Transfer of pollen from the male reproductive structures to the female reproductive structures in a plant
Term
Tropism
Definition
The growth response of a plant toward or away from a stimulus
Term
Transpiration
Definition
The process by which water is lost through the plants leaves
Term
Gymnosperm
Definition
A plant that produces seeds that are not encolsed by a protective covering
Term
Angiosperm
Definition
A plant that produces seeds that are encolsed by a protective covering
Term
Cuticle
Definition
A waxy, water proof layer that covers the leaves of most plants help hold in water
Term
Tissue
Definition
A bunch of cell with the same function
Term
Adaptation
Definition
A characteristic that helps an organism survive in its enviroment and reproduce
Term
Fertilization
Definition
The joining of sperm cells and egg cells
Term
Zygote
Definition
A fertilized egg produced by the joining of a sprem and egg cells
Term
Gamete
Definition
A sperm or egg cell
Term
Vascular Tissue
Definition
An internal system of tube like structures
Term
Rhiziod
Definition
A thin, root like structure that anchors a moss and absorbs water and nurtreints for the plants
Term
Spore
Definition
A tiny cell that is able to grow into a new organism
Term
Frond
Definition
A leaf of a fern plant
Term
Zygote
Definition
A fertilized egg produced by the joining of a sprem and egg cells
Term
Gamete
Definition
A sperm or egg cell
Term
Vascular Tissue
Definition
An internal system of tube like structures
Term
Rhiziod
Definition
A thin, root like structure that anchors a moss and absorbs water and nurtreints for the plants
Term
Spore
Definition
A tiny cell that is able to grow into a new organism
Term
Frond
Definition
A leaf of a fern plant
Term
Pseudopod
Definition
"Flase foot" or temporary bulge of the cell membrane used for feeding and movement in some protozoan
Term
Contractile Vacuole
Definition
The cell structure that collects exrta water from the cytoplasm and then expecls it from the cell
Term
Algae
Definition
A plant-like protist
Term
Protozoan
Definition
An animal-plant protist
Term
Alagal Bloom
Definition
A rapid growth of population
Term
Red Tide
Definition
An algal bloom that occors in salt water
Term
Eutrophication
Definition
the build up of nutrients in fresh water lakes/ponds that leads up to an increase in growth of algae
Term
Hyphae
Definition
One of many branching thread like tube that make up the body of a fungus
Term
Fruiting Bodies
Definition
The repropuctive hyphae of a fungus
Term
Budding
Definition
A form of asexual reproduction in which a new organism grows out the body of a parent
Term
Prokaryote
Definition
An organism without a nucleus
Term
Eukaryote
Definition
An organism with a nucleus
Term
Taxonomy
Definition
The scientific study on how living things are classified
Term
Species
Definition
A group of animals that can produce a fertile off spring
Term
Bacteriophage
Definition
The virus that infects bacteria
Term
Binary Fission
Definition
The asexual way for bacteria to reproduce
Term
Conjugation
Definition
The sexual way for bacteria to reproduce
Term
Antibiotic
Definition
A chemical that kills bacteria
Term
Vaccine
Definition
A substance that contains a dead or weekend virus
Term
Flagellum
Definition
A long, whip like structure that helps a unicellular organism move
Term
Cell
Definition
The basic unit opf structure and function in living things
Term
Autotrophic
Definition
An organism that can make its own food
Term
Heterothrophic
Definition
An organism that cannot make its own food
Term
Stmota
Definition
The small openings under the leaves ehich takes in CO2 and relases O2
Term
Diffusion
Definition
The Movemonet of molecules from a high to low concentration
Term
Passive Transport
Definition
The process in the cell membrane that doesn't require energy
Term
Osmosis
Definition
The movement of water molecules form a high to low concentration
Term
Active Transport
Definition
The process in the cell membrane that require energy
Term
Photosynthesis
Definition
Process by which oranisms capture light energy and use it make to food from CO2 and H2O
Term
Semi-Permeable
Definition
Holes in the cells membrane that allow certian material in and out while keeping some materials out
Term
Cellular Respiration
Definition
The process in which cells break dowm food molecules to release the energy they contain
Term
Organic Compound
Definition
A compound containing carbon exept CO and CO2
Term
Mitosis
Definition
the stage in cell division where the cells nucleus divides into 2 nuclei and 1 copy of of the DNA is distributed in each new daughter cell
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