OLQHS 7th grade science Review and Reinforce
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Created by:
jenniferd511 Plus on October 24, 2011
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Classes:
OLQHS 7th Graders! 2011-2012, study buddies, Warriors, OLQH 7th grade, 7 th grade study buddies
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20 terms
Terms | Definitions |
|---|---|
 Magnification | Condition when objects appear larger than they really are. |
| Resolution | Ability to distinguish details on an object. |
| Electron | __________________microscopes use beams of electrons to produce magnified images. |
| Robert Hooke | First person to observe cells. |
| Microscopes | Instruments that can magnify very small objects and make them look larger. |
| Cells | Basic unit of structure and function in living things. |
| cell theory | A widely accepted explanation of the relationship between cells and living things. |
| tissue | A group of similar cells that work together to perform a function. |
| chloroplast | An organelle that uses light to make food in plants. |
| ribosome | An organelle that makes proteins. |
| nucleus | The control center of the cell. |
| mitochondria | An organelle that breaks down food to make energy. |
| organ | A group of tissues that function together. |
| multicellular | Made up of many cells. |
| interphase | First stage of the cell cycle. This stage last the longest, and DNA replication occurs. |
| mitosis | Stage of the cell cycle during which the cell's nucleus divides. |
| cell cycle | Regular sequence of growth and division that cells undergo. |
| cytokinesis | Final stage of the cell cycle. During this stage of the cell cycle the cell membrame pinches the cell into two. |
| replication | Process in which DNA is copied. |
| chromosome | Doubled rod of condensed chromatin. |
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