Terms : Hide Images
| 4734490725 | Matter | Anything that has mass and takes up space | 0 | |
| 4734491726 | Elements | A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions. | 1 | |
| 4734491979 | Compounds | 2 or more elements chemically combined | 2 | |
| 4734491980 | Atoms | Building blocks of matter | 3 | |
| 4734491981 | Protons | Positively charged particles | 4 | |
| 4734492179 | Neutrons | Neutrally charged particles | 5 | |
| 4734492180 | Electrons | Negatively charged particles | 6 | |
| 4734492377 | Atomic number | The number of protons in the nucleus of an atom | 7 | |
| 4734492378 | Mass number | the sum of the number of neutrons and protons in an atomic nucleus | 8 | |
| 4734492379 | Isotopes | Atoms of the same element having different masses because they contain different numbers of neutrons. | 9 | |
| 4734492514 | Ion | An atom or group of atoms that has a positive or negative charge. | 10 | |
| 4734492515 | pH | a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline. The pH is equal to -log10 c, where c is the hydrogen ion concentration in moles per liter. | 11 | |
| 4734492822 | Organic compounds | compounds that contain carbon | 12 | |
| 4734492975 | Inorganic compounds | Compounds that do not contain carbon | 13 | |
| 4734492976 | Hydrocarbons | Compounds composed of only carbon and hydrogen | 14 | |
| 4734493207 | Physical change | A change in a substance that does not involve a change in the identity of the substance | 15 | |
| 4734493357 | Chemical change | A change in matter that produces one or more new substances | 16 | |
| 4734493358 | Concentration | A measurement of how much solute exists within a certain volume of solvent | 17 | |
| 4734493660 | Natural | existing in or caused by nature; not made or caused by humankind. | 18 | |
| 4734493661 | Synthetic | Made or put together by people; something artificial | 19 | |
| 4734493662 | Kinetic Energy | Energy of motion | 20 | |
| 4734494089 | Potential Energy | Stored Energy | 21 | |
| 4734494090 | Radioactive decay | A spontaneous process in which unstable nuclei lose energy by emitting radiation | 22 | |
| 4734494393 | Fission | A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy. | 23 | |
| 4734494394 | Fusion | Creation of energy by joining the nuclei of two hydrogen atoms to form helium. | 24 | |
| 4734494395 | Half-life | The time required for one half of the atoms of a radioisotope to emit radiation an decay products | 25 | |
| 4734494631 | Law of conservation of matter | Matter is not created nor destroyed in any chemical or physical change | 26 | |
| 4734494935 | 1st Law of Thermodynamics | Energy cannot be created or destroyed | 27 | |
| 4734495138 | 2nd Law of Thermodynamics | Every energy transfer or transformation increases the entropy of the universe. | 28 | |
| 4734495396 | Euaryotic | 2 Classifications of Cells | 29 | |
| 4734495397 | prokaryotic | No nucleus | 30 | |
| 4734495546 | gene | A segment of DNA on a chromosome that codes for a specific trait | 31 | |
| 4734495547 | trait | A characteristic that an organism can pass on to its offspring through its genes. | 32 | |
| 4734495548 | chromosome | A threadlike, gene-carrying structure found in the nucleus. Each chromosome consists of one very long DNA molecule and associated proteins. | 33 | |
| 4734496254 | species | A group of similar organisms that can breed and produce fertile offspring. | 34 | |
| 4734496255 | population | A group of individuals that belong to the same species and live in the same area | 35 | |
| 4734496502 | community | A group of interdependent organisms inhabiting the same region and interacting with each other | 36 | |
| 4734496503 | ecosystem | A biological community of interacting organisms and their physical environment. | 37 | |
| 4734496507 | producers/autotrophs | Make their own food | 38 | |
| 4734497065 | Consumers | An organism that obtains energy and nutrients by feeding on other organisms or their remains. | 39 | |
| 4734497416 | heterotrophs | An organism that obtains organic food molecules by eating other organisms or their by-products. | 40 | |
| 4734497417 | decomposers | Break down organic matter | 41 | |
| 4734497418 | photosynthesis | Conversion of light energy from the sun into chemical energy. 6CO2 + 6H2O + light --> C6H12O6 + 6O2 | 42 | |
| 4734497751 | cellular respiration | Process that releases energy by breaking down glucose and other food molecules in the presence of oxygen | 43 | |
| 4734497752 | aerobic | Process that requires oxygen | 44 | |
| 4734498108 | anaerobic | Describes a process that does not require oxygen. | 45 | |
| 4734498109 | adaptation | A trait that helps an organism survive and reproduce | 46 | |
| 4734498110 | mutation | A change in a gene or chromosome. | 47 | |
| 4734498308 | biodiversity | The amount of biological or living diversity per unit area. It includes the concepts of species diversity, habitat diversity and genetic diversity. | 48 | |
| 4734498746 | extinction | A term that typically describes a species that no longer has any known living individuals. | 49 | |
| 4734498747 | atmosphere | A mixture of gases that surrounds a planet or moon. | 50 | |
| 4734499102 | lithosphere | A rigid layer made up of the uppermost part of the mantle and the crust. | 51 | |
| 4734499103 | hydrosphere | All the water at and near the surface of the earth, 97% of which is in oceans | 52 | |
| 4734499297 | plate tectonics | A theory stating that the earth's surface is broken into plates that move. | 53 | |
| 4734499298 | weathering | The breaking down of rocks and other materials on the Earth's surface. | 54 | |
| 4734499748 | climate | Overall weather in an area over a long period of time | 55 | |
| 4734499749 | weather | The condition of Earth's atmosphere at a particular time and place. | 56 | |
| 4734499750 | climate change | Change in the statistical properties of the climate system when considered over periods of decades | 57 | |
| 4734500081 | rocks | A naturally formed aggregate, or mixture, of minerals; have varied chemical compositions | 58 | |
| 4734500932 | minerals | Inorganic compounds essential for normal metabolism, growth and development, and regulation of cell activity. | 59 |
