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6th Science 1st quarter exam
6th Science 1st quarter exam
52
Science
6th Grade
09/30/2013

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Term
vaccine
Definition
a preparation of the dead or weakend bacteria or viruses that produces immunity to a disease
Term
virus
Definition
a tiny disease-causing life form consisting of genetic material wrapped inside a capsule of protein
Term
toxin
Definition
a poison produced by an organism
Term
symbiosis
Definition
a relationship between two organisms in which at least one organism benefits
Term
moneran
Definition
any of mostly one-celled organisms in which the cell does not have a nucleus
Term
immune system
Definition
the body's system that defends the body against pathogens
Term
fission
Definition
a method of asexual reproduction in which a parent cell divides to form two new cells
Term
communicable disease
Definition
a disease that can be passed from one individual to another
Term
blue-green bacteria
Definition
monerans that contain chlorophyll
Term
bacteria
Definition
monerans that feed on dead organic matter or on living things
Term
antibody
Definition
a protein produced in the blood that destroys or weakens bacteria and other pathogens
Term
antibiotic
Definition
a substance, produced by microbes or fungi, that can destroy bacteria or stop their growth.
Term
What is ethanol and what are some of its uses?
Definition
Ethanol is a kind of alcohol used to make medicines, food products, and various other items.
Term
Why is ethanol a good source of fuel?
Definition
BecauseĀ  ethanol is unlimited and oils wont last forever.
Term
How are diatoms and other algae important to the ocean environment?
Definition
Diatoms makeup a large part of the ocean plankton. Algae provide oxygen, which all living things depend on.
Term
What might our environment be like if there were no fungi?
Definition
Fungi grow and feed on organic matter. As they feed they break down matter and return nutrients to the soil. Without this process the Earth would be covered with a great deal of waste.
Term
fungus
Definition
any of a large group of organisms that feed on dead organisms or that are parasitic
Term
fermentation
Definition
a chemical change in which an organism breaks down sugar to produce carbon dioxide and alcohol or lactic acid
Term
cell membrane
Definition
the structure that surronds and encloses a cell and controls the movement of substances into and out of the cell
Term
multicellular
Definition
made up of more than one cell
Term
protist
Definition
any of a large group of mostly single-celled, microscopic organisms
Term
the structure that surrounds and encloses a cell and controls the movement of substances into and out of the cell
Definition
cell membrane
Term
a theory that states that cells are the basic units of structure and function of all living things
Definition
cell theory
Term
the process in cells which oxygen is used to release stored energy by breaking down sugar molecules
Definition
cell respiration
Term
a tiny green organelle that contains chlorophyll and is found in plant cells and some protist cells
Definition
chloroplast
Term
a threadlike structure in the nucleus of a cell; it carries the genes that determine the traits an offspring inherits from its parent or parents
Definition
chromosome
Term
the watery gell inside a cell
Definition
cytoplasm
Term
a chemical change in which organisms breaks down sugar to produce carbon dioxide and alcohol or lactic acid
Definition
fermentation
Term
cell organelles in which energy is release from food
Definition
mitochondria
Term
the development of cells into different and specialized cell types
Definition
cell differentiation
Term
the structue that surrounds and enclose the nucleus and controls what substances move into and out of the nucleus
Definition
nuclear membrane
Term
a group of organs that work together to perform one or more functions
Definition
organ system
Term
the process by which green plants and other producers use light energy to make food
Definition
photosynthesis
Term
a group of similar, specialized cells working together to carry out the same function
Definition
tissue
Term
the basic unit that makes up all living things
Definition
cell
Term
the rigid structure surrounding the cells of plants, monerans, and some protist
Definition
cell wall
Term
the tendency of substances to move from an area of greater concentration to an area of lesser concentration
Definition
diffusion
Term
the process in which one cell divides to form two identical new cells
Definition
mitosis
Term
the dense, central part of an atom
Definition
nucleus
Term
a part of a multicellular organism made up of a group of tissues that work together to perform a certain function
Definition
organ
Term
the diffusin of water through a membrane
Definition
osmosis
Term
a structure in the cytoplasm in which food and other substances are stored
Definition
vacuole
Term
Explain cell differentiation
Definition
As an organism grows its cells develop into different and specialized cells. Each type of cell has a structure that makes it specialized for a special task.
Term
How does the lack of sunlight affect food supply?
Definition
Sunlight is necessary for photosynthesis in green plants and other producers.
Term
Know the difference between an animal cell and a plant cell.
Definition
A plant cell is a cell that is a structural and functional unit of a plant. A animal cell is an organism whose cells contain complex structures enclosed within membranes.
Term
any of various plantlike protists
Definition
algae
Term
a microscopic, one-celled algae with a glasslike cell wall
Definition
diatom
Term
a kind of alcohol used to make medicines, food products, and various other items
Definition
ethanol
Term
organisms, generally microscopic in size, that float or drift in the ocean
Definition
plankton
Term
protist that have animal-like traits
Definition
protozoan
Term
an organism that lives on dead or decaying matter
Definition
saprophyte
Term
a reproductive cell that can develop into a new organism
Definition
spore
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