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5 Topic
Energy in Cells
| Question | Answer |
|---|---|
| chemical reaction | when atoms or molecules are combined and new substances are produced and energy is released or absorbed in the process |
| chemical formula | the abbreviated way of writing the name of a substance (ex. water is H2O) to show what elements are in it and how many atoms of each |
| chemical energy | energy stored in bonds of atoms or molecules |
| chemical equation | the abbreviated way of writing a chemical reaction |
| products | the substances at the end of a chemical reaction (the right side of a chemical equation) |
| energy | the ability to do work, comes in different forms: heat, light, motion, chemical, etc |
| calorie | a measurement of energy in the form of heat given off (as when something is burned or when energy is released from food) |
| metabolism | all the chemical reactions that take place in a living organism |
| autotrophs | organisms that make food for themselves (ety: auto = self, troph = feeding), also called producers (adjective = autotrophic) |
| heterotrophs | organisms that must eat to get energy (ety: hetero = other, troph =feeding), also called consumers (adjective = heterotrophic) |
| photosynthesis | chemical reaction that takes place in the chloroplasts of producers to produce sugars as a food source (ety: photo = light, synthesis = making food from) |
| chlorophyll | the pigment in plants that gives them their green color and which is used in photosynthesis |
| respiration | chemical reaction that takes place in the mitochondria of both consumers and producers which releases the energy trapped in sugars (ety: “breathing” of cells as they take in oxygen) |
| -> | the “yields” sign in a chemical equation...points to what new substances will be made in the reaction |
| ∆ | the “delta” sign in a chemical equation…means “change in” whatever is being talked about |
| chemical bonds | connection that holds atoms together to form molecules; the connection is made when atoms share or steal electrons |
Created by:
deirdrek827
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