Terms : Hide Images
| 4834028495 | Mass | A measure of the amount of matter an object contains. |  | 0 |
| 4834029412 | Atom | The smallest particle that can contain the chemical properties of an element. |  | 1 |
| 4834030762 | Element | A substance composed of atoms that cannot be broken down into smaller, simpler components. |  | 2 |
| 4834032679 | Molecule | A particle that contains more than one atom. |  | 3 |
| 4834033314 | Compound | A molecule containing more than one element. |  | 4 |
| 4834033892 | Atomic number | The number of protons in the nucleus of a particular element. | | 5 |
| 4834034662 | Mass number | A measurement of the total number of protons and neutrons in an element. |  | 6 |
| 4834035752 | Isotopes | Atoms of the same element with different numbers of neutrons. |  | 7 |
| 4834036603 | Radioactive decay | The spontaneous release of material from the nucleus of radioactive isotopes. |  | 8 |
| 4834037704 | Half life | The time it takes for one-half of an original radioactive parent atom to decay. |  | 9 |
| 4834039102 | Covalent bond | The bond formed when elements share electrons. |  | 10 |
| 4834040937 | Ionic bond | A chemical bond between two ions of opposite charges. |  | 11 |
| 4834041942 | Hydrogen bond | A weak chemical bond that forms when hydrogen atoms that are covalently bonded to one atom are attracted to another atom on another molecule. |  | 12 |
| 4834045593 | Polar molecule | A molecule in which one side is more positive and the other side is more negative. |  | 13 |
| 4834047214 | Surface tension | A property of water that results from the cohesion of water molecules at the surface of a body of water and that creates a sort of skin on the water's surface. |  | 14 |
| 4834052278 | Capillary action | A property of water that occurs when adhesion of water molecules to a surface is stronger than cohesion between the molecules. |  | 15 |
| 4834053701 | Acid | A substance that contributes hydrogen ions to a solution. |  | 16 |
| 4836048497 | Base | A substance that contributes hydroxide ions to a solution. |  | 17 |
| 4836048858 | pH | The number that indicates the relative strength of acids and bases in a substance. |  | 18 |
| 4836050611 | Chemical reaction | A reaction that occurs when atoms separate from molecules or recombine with other molecules. |  | 19 |
| 4836054032 | Law of conservation of matter | A law of nature stating that matter cannot be created or destroyed; it can only change from. |  | 20 |
| 4836054894 | Inorganic compound | A compound that does not contain the element carbon or or contains carbon bound to elements other that hydrogen. |  | 21 |
| 4836056737 | Organic compound | A compound that contains carbon-carbon and carbon-hydrogen bonds. | 22 | |
| 4836057276 | Carbohydrate | A compound composed of carbon, hydrogen, and oxygen atoms. |  | 23 |
| 4836058583 | Protein | A critical component of living organism made up of a long chain of nitrogen-containing organic molecules known as amino acids. |  | 24 |
| 4836059677 | Nucleic acid | Organic compounds found in all living cells. |  | 25 |
| 4836060130 | DNA | Deoxyribonucleic acid. Carries the genetic code. |  | 26 |
| 4836061096 | RNA | Ribonucleic acid. Translates the code stored in DNA which makes possible the synthesis of proteins. |  | 27 |
| 4836062069 | Lipid | Organic molecule that does not mix with water. |  | 28 |
| 4836062734 | Cell | A highly organized living entity that contains all the 4 types of macromolecules and other substances in a watery solution, surrounded by a membrane. |  | 29 |
| 4836067047 | Energy | The ability to do work or transfer heat. |  | 30 |
| 4836067650 | Joule | The amount of energy used when 1-watt electrical device is turned on for 1 second. |  | 31 |
| 4836070062 | Power | The rate at which work is done. |  | 32 |
| 4836070506 | Electromagnetic radiation | A form of energy emitted by the sun that includes, but is not limited to visible light, ultraviolet light, and infrared energy. |  | 33 |
| 4836071243 | Photon | A massless packet of energy that carries electromagnetic radiation at the speed of light. |  | 34 |
| 4836071796 | Potential energy | Stores energy that has not been released. |  | 35 |
| 4836072281 | Chemical energy | Potential energy stored in chemical bonds. |  | 36 |
| 4836072657 | Kinetic energy | The energy of motion. |  | 37 |
| 4836073003 | Temperature | The measure of the average kinetic energy of a substance. |  | 38 |
| 4836073691 | First Law of Thermodynamics | States that energy can neither be created nor destroyed but can change from one form to another. |  | 39 |
| 4836075066 | Second Law of Thermodynamics | States that when energy is transformed, the quantity of energy remains the same, but its ability to do work diminishes. |  | 40 |
| 4836076387 | Energy efficiency | The ratio of the amount of energy expended in the form you want to the total amount of energy that is introduced into the system. |  | 41 |
| 4836077930 | Energy quality | The ease with which an energy source can be used for work. |  | 42 |
| 4836078932 | Entropy | Randomness in a system. |  | 43 |
| 4836079242 | Open system | A system in which exchanges of matter or energy occur across system boundaries. |  | 44 |
| 4836079781 | Closed system | A system in which matter and energy exchanges do not occur across boundaries. |  | 45 |
| 4836080431 | Input | An addition to a system. |  | 46 |
| 4836080636 | Output | A loss from a system. | | 47 |
| 4836080828 | Systems analysis | An analysis to determine inputs, outputs, and changes in a system under various conditions. |  | 48 |
| 4836081507 | Steady state | Inputs equal outputs so that the system is not changing over time. |  | 49 |
| 4836084326 | Negative feedback loop | When a system responds to a change by returning to its original state, or by decreasing the rate at which the change is occurring. |  | 50 |
| 4836085688 | Positive feedback loop | When a change in a system is amplified. |  | 51 |
| 4836086247 | Adaptive management plan | A plan that provides flexibility so that managers can modify it as changes occur. |  | 52 |
