4th Grade Science Lessons 1 - 5
Created by ftbrady
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scientist who studies life
biologists
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a living thing
organism
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the smallest unit of an organism
cell
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thin layer around the outside of a cell that allow some substances to enter and leave the cell
cell membrane
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gel-like material inside the cell membrane
cytoplasm
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cell structure that controls many of the functions of animal and plant cells
nucleus
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cell structures that convert food to energy
mitochondria
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cell structures that stores food and other nutrients or waste products
vacuoles
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rigid structure that surrounds the cell membrane and helps the plant cell keep its shape
cell wall
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the cell wall of a plant cell is mostly made of this
cellulose
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structures in a plant cell that use light to produce food for the plant
chloroplasts
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what 2 structures do plant cells have that animal cells do not
cell walls & chloroplasts
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grow, reproduce, respond to their environment, consume, made of one or more cells
5 characteristics of organisms