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6th grade science vocab.
chapters 1-14 glencoe science
58
Science
05/19/2010

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Term
science
Definition
the process of trying to understand the world around you; a set steps that can be followed to help find out about something or to solve a problem
Term
organism
Definition
a living thing that has all five traits of life. It responds, moves, shows organization, reproduces, grows and develops.
Term
hypothesis
Definition
a statement about a problem that can be tested.
Term
species
Definition
a group of organisms that can bread with one another and produce healthy offspring.
Term
cell
Definition
the smallest unit of life in a living thing; take in materials and release energy and waste products.
Term
asexual reproduction
Definition
a type of reproduction in which an organism produces a new organism from one parent and all the DNA of the new organism comes from that one parent.
Term
sexual reproduciton
Definition
a type of reproduction in which a new organism is produced from 2 parents whose DNA combines to produce the new individual with its own DNA.
Term
embryo
Definition
a fertilized egg that has begun dividing into more cells.
Term
meiosis
Definition
the process of sex cell formation during which the chromosome number in each sex cell becomes half the number found in other body cells.
Term
mitosis
Definition
the process of nuclear division that results in 2 nuclei containing identical information.
Term
ecosystem
Definition
the working unit made up of organisms interacting with each other and non living factors.
Term
community
Definition
all the populations living in the area that depend on each other for food, shelter, and other assorted needs.
Term
habitat
Definition
the place in which an organism lives out its life and where resources such as food, space, and shelter are shared among the different species.
Term
biosphere
Definition
the part of earth in which organisms can live; includes the top most layer of earth's crust, the surrounding atmosphere, and all the rivers, lakes, and oceans.
Term
consumer
Definition
an organism that eats other organisms.
Term
producer
Definition
an organism, such as a plant, that is able to use energy from the sun to make its own food.
Term
decomposer
Definition
organism, such as bacteria or fungi, that feed on dead organisms or the waste material of other organisms.
Term
population
Definition
a group of the same organisms living in the same place at the same time.
Term
atom
Definition
an extremely small particle that is the basic unit of matter; it is composed of mainly protons, neutrons, and electrons.
Term
matter
Definition
anything that has mass and takes up space. ex: air - its basic unit is the atom.
Term
electrons
Definition
negatively charged particles that is the lightest of the 3 main particles found in an atom and that forms a cloud around the nucleus.
Term
neutron
Definition
a particle without a charge and is found in the nucleus of an atom.
Term
proton
Definition
positively charged particle located in the nucleus of an atom.
Term
element
Definition
natural or synthetic matter that is made up of only one type of atom. their are 112 known elements for example gold, aluminum, and oxygen
Term
compound
Definition
a form of matter made by combining 2 or more different kinds of elements.
Term
chemical change
Definition
the change of materials into other new materials with different properties.
Term
physical change
Definition
a change in shape, size, form, or state of matter that can be observed without changing the identity of matter.
Term
chemical property
Definition
a characteristic of a substance that permits its change to a new substance. example: the ability to burn and the ability to react with oxygen.
Term
physical property
Definition
a characteristic of matter that can be observed by the senses. examples: shape, size, taste, texture, and form
Term
inertia
Definition
resistance to a change in motion.
Term
mass
Definition
the amount of matter in an object.
Term
friction
Definition
the push or pull that opposes motion when 2 touching surfaces are sliding on each other.
Term
force
Definition
a push or pull. examples: gravity and friction
Term
gravity
Definition
a pull that every object exerts on every other object and that pulls all things towards earth in the same way.
Term
incline plane
Definition
a simple machine with a sloped surface that makes it easier to move objects. ex: a moving van ramp
Term
lever
Definition
a simple machine made from a bar or rod that is free to rotate around a fulcrum. ex: fishing rods and seesaws
Term
pulley
Definition
a simple composed of a surface with a chain or rope going around it and that can be either fixed or movable.
Term
screw
Definition
an incline plane wrapped around a rod. this simple machine makes it easier to hold objects together.
Term
wedge
Definition
an incline plane with one or two sloping sides. ex: knives or chisels
Term
wheel and axel
Definition
a simple machine that is made with 2 wheels of different sizes that are connected and turn together. ex: door knobs and fishing reels.
Term
work
Definition
exerting a force on an object over a distance in the same direction as the objects motion.
Term
potential energy
Definition
the energy that is stored that comes from position or condition. can be transformed into kinetic energy when something acts to release the stored energy.
Term
kinetic energy
Definition
the energy that comes from motion of an object and that depends on the objects mass and speed.
Term
thermal energy
Definition
the amount of kinetic and potential energy in the atoms that make up a material can be transferred from one place to another through conduction, radiation, and convection.
Term
heat
Definition
thermal energy that is transferred from a warmer object to a cooler object.
Term
conduction
Definition
the transfer of kinetic energy from a faster moving molecule to a slower moving molecule that isn't moving place to place but is moving in place.
Term
convection
Definition
the transfer of thermal energy by the moving of molecules from one place to another in a liquid or gas; the type of transfer of thermal energy that produces weather.
Term
radiation
Definition
the energy that travels by waves in all directions from its source.
Term
electrical energy
Definition
the energy of charges in motion
Term
magnetic field
Definition
the area around a magnet in which magnetic forces act.
Term
circuit
Definition
an unbroken closed path that electrons travel on to do work.
Term
static electricity
Definition
a form of potential electrical energy caused by the build up or lose of electrons
Term
constellation
Definition
a group of stars such as the big dipper that forms a pattern in the sky; that may be named after a real or imaginary animal, person, or object.
Term
rotation
Definition
the spinning of earth on its imaginary axis which occurs every 24 hours and causes day and night.
Term
eclipse
Definition
an event that happens when the moon passes between the sun and the earth or the earth passes between the sun and the moon.
Term
revolution
Definition
the movement of earth in a regular curved path around the sun which takes one year to complete.
Term
satellite
Definition
a space craft launched into space to gather information and send it back to earth.
Term
solar system
Definition
the 9 planets and numerous other objects, such as astroids, that circle the sun.