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Science 8 Exams
Physical science vocabulary words for Science
| Question | Answer |
|---|---|
| What refers to the different ways scientists study the natural world? | Scientific Inquiry |
| What are factors that can change in an experiment? | Variables |
| What is the variable that is changed in an experiment? | Manipulated Variable |
| What is the variable that is expected to change because of the manipulated variable? | Responding Variable |
| An investigation in which all variables except one remain the same is called a _________. | Controlled Experiment |
| Sharing ideas and conclusions with others through writing and speaking is _________. | Communicating |
| What is a statement that describes what scientists expect to happen every time under a particular set of conditions? | Scientific Law |
| What is a well-tested explanation for a wide range of observations? | Scientific theory |
| What is a way of changing the natural world to meet human needs or solve problems? | Technology |
| The process in which group members freely suggest any creative solutions that come to mind is ________. | Brainstorming |
| The process of analyzing a design problem and finding a way to fix it is called what? | Troubleshooting |
| A single kind of matter that is pure, meaning it always has a specific makeup- or composition- and a specific set of properties is __________. | Substance |
| When atoms combine, they for a _________ _______. | Chemical Bond |
| When you can see the different parts in a mixture, like Trail Mix, it is a __________ mixture. | Heterogeneous |
| When the substances in a mixture are so evenly mixed you can't see the different parts, it is a ____________ mixture. | Homogeneous |
| Any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance is what? | A physical change |
| The fact that matter is not created or destroyed in any chemical or physical change is called what? | The Law of Conservation of Mass |
| Any change that is ABSORBED is? | Endothermic change |
| Any change that is GIVING OFF energy? | Exothermic change |
| The energy of matter in motion is ________. | Kinectic Energy |
| The change from a liquid to a gas is called what? | Vaporization |
| This occurs when the surface particles of a solid gain enough energy that they form a gas. | Sublimation |
| When the pressure of a gas at constant temp. is increased, the volume of the gas decreases. This was _____________ Law. | Boyle's |
| When the temp. of a gas is increased at constant pressure, its volume decreases. When the temp. of a gas is decreased at constant pressure, its volume decreases. This was ___________ Law. | Charles's |
| An isotope is ___________________________________________________________________. | Atoms with the same number of protons and a different number of neutrons. |
| Horizontal rows in the periodic table are ___. | Periods |
| Verticle columns in the periodic table are ___. | Groups |
| This moves atomic nuclei faster and faster until they have reached very high speeds. | Particle Accelerators |
| An element that lacks most of the properties of a metal is ____. | nonmetal |
| This means "salt forming" | Halogens |
| This consists of high-energy waves, similar to X-Rays. | Gamma Radiation |
| Radioactive isotopes that can be followed through the steps of a chemical reaction or an industrial process are _______. | Tracers |
| Electrons that have the highest energy level and are held most losely are what? | Valence Electrons |
| This is an atom or group of atoms that has an electric charge. | An ion |
| Ions that are made of more than one atom are called ________________. | Polyatomic ions |
| The chemical bond formed when two atoms share electrons is called a ____________. | Covalent Bond |
| What is a compound that is composed of molecules? | Molecular Compound |
| An ___ is a mixture made of two or more elements that has the properties of a metal. | Alloy |
| A solid that forms from solution during a chemical reaction is called a ___________. | Precipitate |
| The substances you have at the beginning of an experiment are what? | Reactants |
| What is conservation of mass? | It states that during a chemical reaction, matter is not created or destroyed. |
| What is the material that increases the rate of a reaction by lowering the activation energy? | Catalyst |
| By bringing reactant molecules close together, this thing lowers the activation energy needed. | Enzymes |
| A material used to decrease the rate of a reaction is an ________. | inhibitor |
| What is combustion? | a rapid reaction between oxygen and a fuel. |
Created by:
rach1225
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