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