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g7 Segment 2
7th grade STEMscopes CA Segment 2 (all scopes)
| Question | Answer |
|---|---|
| Atom | The smallest particle of an element; made of electrons, protons, and neutrons |
| Bulk Quantities | Large amounts |
| Carbon | A naturally occurring element of Earth; an essential building block of organic compounds |
| Carbon Dioxide | A gas that is a natural component of the atmosphere; produced by cells during cellular respiration and used by plants and other organisms for photosynthesis |
| Cellular Respiration | The process of obtaining energy from the breaking of chemical bonds in nutrients |
| Chemical Change | A change that involves one substance being pulled apart or combined with another substance to form a completely different substance or substances |
| Chemical Equation | Chemical formulas and symbols written to represent a reaction |
| Chemical Formula | A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of a substance |
| Chemical Process | Method or means of changing one or more chemicals or chemical compounds |
| Chemical Property | A characteristic that can be observed or measured only when atoms rearrange during a chemical change |
| Chemical Reaction | The process by which one or more substances change to produce on or more different substances |
| Chloroplast | A membrane-bound organelle in plants that is the site of photosynthesis |
| Coefficient | A number placed in front of a chemical symbol or formula that represents the number of molecules |
| Compound | A new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a chemical reaction |
| Conservation of Matter | The law that says matter is neither created nor destroyed in ordinary chemical or physical processes |
| Conserve | To prevent the loss of something |
| Cycle | A repeated sequence of events |
| Endothermic Reaction | A chemical reaction in which heat is absorbed |
| Energy | The ability of a system to do work; required for changes to happen within a system |
| Exothermic Reaction | A chemical reaction in which heat is released |
| Glucose | A sugar composed of six carbon atoms that is the preferred energy source for most cells; produced by photosynthesis |
| Igneous Rock | Rock formed when lava or magma cools, forms crystals, and solidifies |
| Law of Conservation of Matter | Scientific law stating that the mass of all reactants must equal the mass of all products; matter is neither created nor destroyed |
| Mass | A measure of how much matter is present in a substance |
| Matter | Anything that has volume and mass |
| Matter Cycle | The movement of elements or molecules through a repeated sequence of events |
| Metamorphic Rock | Rock formed deep underground due to heat and pressure |
| Microorganism | An organism that is too small to be seen with the naked eye |
| Molecule | The simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically |
| Oxygen | A gas produced by plants during photosynthesis that animals use for respiration |
| Photosynthesis | A chemical reaction during which plants convert radiant energy from the Sun to chemical energy; the reaction converts carbon dioxide and water into sugar (glucose) and oxygen |
| Physical Change | A change to a substance that occurs without forming a new substance, such as a change in size or state of matter |
| Physical Property | A characteristic that can be observed or measured without changing the substance |
| Phytoplankton | Microscopic plants that live in aquatic environments and perform photosynthesis |
| Precipitate | An insoluble solid formed from a chemical reaction |
| Product | A substance produced during a chemical reaction |
| Properties | Physical and chemical characteristics of matter used to describe or identify a substance |
| Pure Substance | A single substance, either an element or a compound, with definite composition and properties |
| Reactant | A substance that takes part in and undergoes change during a chemical reaction |
| Rock Cycle | The cycle through which Earth’s rocks change from one type into another over time due to various Earth processes; creates changes in mineral compositions and physical structures |
| Sedimentary Rock | Rock formed when particles of other rocks are deposited in layers and cemented together |
| Subscript | A number written below and to the right of a chemical symbol that shows the number of a specific type of atom present |
| Synthetic Materials | Materials made from one or more natural substances that undergo a chemical process |
| System | A group of interacting, interrelated, or interdependent elements forming a complex whole |
| Thermal Energy | The total kinetic (motion) energy of the tiny particles that make up matter; the faster the particles move, the warmer the matter becomes |
Created by:
ncraft13
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