SCS 7th Grade Science-Section 1 What is Life?
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Created by:
msflemming on September 7, 2011
Description:
Students may use these cards to study and review science vocabulary for this unit
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21 terms
Terms | Definitions |
|---|---|
 organisms | Any living thing |
| cell | The smallest/basic unit of structure and function within an organism. |
| microscope | A tool that uses lenses to magnify small objects |
| Unicellular | "uni" means one or single. A single-celled organism Example- bacteria |
| Multicellular | "Multi" means many. Organisms composed of many different cells. Example - A human body |
| water | The most abundant chemical in cells |
| carbohydrates | A cell's main source of energy |
| proteins and lipids | The building materials of cells |
| nucleic acids | Genetic material that gives chemical instructions about how each cell should function. |
| stimulus (stimuli) | A change in an organism's surroundings that cause it to react. Something that causes a cell to react Example- loud noise, light, explosion, roller coasters. |
| response | An action or change in behavior based on a stimulus. Example- You experience fear and scream when someone jumps out at you. |
| development | The process of change that occurs during an organism's life to produce a more complex organism. |
| reproduction | The ability to produce offspring that are similar to the parents |
| spontaneous generation | The incorrect idea that living things can be produced from nonliving sources. |
| controlled experiment | an experiment in which a scientist carries out tests changing only one variable at a time |
| autotroph | "auto"-means self "troph"-means feeder organisms that make their own food in orderto cary out their cell's functions. Example- plants |
| heterotroph | "hetero" -means other "troph"- means feeder organisms that get their energy from eating food produced by other sources. Example humans and animals. |
| living space | a place/space where an organism gets food water and shelter in order to survive. |
| homeostasis | maintaining or keeping a stable internal condition within a cell so that it can survive and be healthy |
| Louis Pasteur | Scientist of the 1800's that proved that proved spontaneous generation was false. He experimented with mold growing on beef broth. |
| Francesco Redi | Scientist of the 1600's that proved spontaneous generation was false. He experimented with maggots growing on raw meat. |
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