cambium
a layer of cells in plants that separates the xylem and the phloem
cancer
a disease in which harmful cells multiply without stopping
canines
the long, pointy teeth next to the front teeth
capillary
a tiny blood vessel
carbohydrate
a group of chemical compounds made from carbon, oxygen, and hydrogen
cardiovascular system
another name for the circulatory system, which transports materials throughout the body
cecum
the first, shortest part of the large intestine
cell
the smallest unit of living matter that can carry out the basic processes of life
cell membrane
the layer around the outside of a cell
cell wall
an additional layer around the outside of plant cells
cellular respiration
the life process in which energy is released from food (sugar) inside a cell
chemical
a substance obtained by or used in a chemical process
chemical change
a change that causes a new kind of matter to form with different properties
chemical formula
a way to write a compound's name using symbols
chemical reaction
a change that creates a new kind of matter (product) with different properties from the original matter (reactant)
chlorophyll
a green chemical that plants use for photosynthesis
chloroplast
green structures inside plant cells that turn sunlight into food
Chordata
a phylum of animals that have a supporting rod that runs most of the length of the body for at least part of their lives
circulatory system
the organ system that moves blood through the body
class
a smaller group within a phylum of similar organisms
classify
to place similar materials together in a group
climate
the average weather patterns of a region
collecting duct
a tube connected to nephrons within the kidney
colon
the widest and longest part of the large intestine
comet
a piece of ice mixed with rocks, dust, and gases moving through space
communicate
to share information
compound
a substance formed by the chemical combination of two or more elements held together by chemical bonds that cannot be separated by physical means
condensation
the process in which matter changes state from gas to liquid
condensing point
the particular temperature at which a substance changes state from gas to liquid
conduct
to transfer heat or electricity from one place to another
conductivity
the degree to which heat or electricity flows through a substance
conservation
the act or policy of saving or protecting something
contaminate
to make dirty or impure
convection
the transfer of heat through the movement of a gas or liquid
Coriolis effect
in the northern hemisphere, counterclockwise movement caused by Earth's rotation
corrosion
the gradual weakening and wearing away of something, usually due to a chemical reaction
current
an ongoing movement in one direction
cyclone
a storm with a low pressure closure and a circular pattern of winds
cytoplasm
the gel-like substance that fills a cell