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WES Qtr. 1 Science

Matter and Cells

TermDefinition
solid matter that has a definite volume and a definite shape
liquid matter that has a definite volume, but no definite shape; takes the shape of the container that it is in
gas matter that does not have a definite shape or a definite volume
solid particles are very close together-packed tightly
liquid particles are not as close together and can flow over and under other particles
gas particles are further apart, bounce off each other, and move very fast
physical change cutting, bending, and wetting matter are ways to cause this type of change
chemical change when matter burns, oxidizes, or is dissolved in an acid, this type of change occurs and the change is permanent
mixture a combination of two or more substances that keep their identity
solution a "special mixture" that has the same composition throughout
nucleus center of the atom
proton positive charge; found in the nucleus
neutron no charge; found in the nucleus
electron negative charge; move very fast around the nucleus in an orbit called the electron cloud
Cell Membrane surround the cell and controls what enters and leaves it
Cell Wall surrounds and provides support for plant cells
Chloroplast uses energy from the sunlight to make food; only in plant cells
Cytoplasm jelly-like substance that holds organelles in place
Mitochondria Powerhouse of the cell; releases energy the cell needs to work
Nucleus brain of the cell; directs the cell's activities
Vacuole stores water, nutrients, and wastes
mass amount of matter in an object
volume amount of space an object takes up
microscope helps us see VERY small objects
stopwatch helps us measure elapsed time in minutes and seconds
ruler helps us measure length in cm and mm
temperature measures the energy of motion of the particles in matter
Boiling Point 100 degrees Celsius and 212 degrees Fahrenheit
Freezing Point 0 degrees Celsius and 32 degrees Fahrenheit
Dmitri Mendeleev person who arranged the periodic table by atomic weight and similar properties
element a pure substance that cannot be broken down into any other substance; recognized by a symbol on the periodic table
atom smallest bit of matter
compound two or more elements combined
molecule smallest part of a compound
Created by: lkcasteel