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Science Study Guide
| Question | Answer |
|---|---|
| What is the density of a substance whose mass is 52 grams and whose volume is 16 mL? | 3.25 g/mL |
| Definition of a solid | the state of matter that has a defined shape and volume with molecules that are closely packed and vibrate in place |
| Definition of a liquid | a state of matter with a defined volume but no defined shape and whose molecules roll past each other |
| Speed of a solid | Particles in solids move slower than liquids and gasses |
| Speed of a liquid | move about and slide past each other |
| Speed of a gas | Particles in a gas move faster than liquids and solids |
| Definition of covalent bonds | a chemical link between two atoms that share electrons |
| How many electrons are needed in the outer energy level (valence electrons) for atoms to be stable ? | 8 valence electrons |
| Definition of a catalyst | substance that increases the rate of a chemical reaction by lowering the amount of energy needed for the reaction to occur, but is not changed by the reaction |
| Definition of law of conservation of mass | a fundamental principle of science stating that mass cannot be created or destroyed in a closed system through ordinary chemical or physical means |
| What are the signs of chemical reaction? | Bubbles of Gas Precipitate Forms Color Changes Temperature Change Light Emitted Change in Smell/Taste |
| Definition of Exothermic Reactions | chemical reaction that gives off heat energy |
| What are the characteristics of acids and bases? | Acids - Sour to taste , harmful Bases - Slimmy |
| Definition of Motion | a change in the position of an object compared to another object |
| What is the label for speed? | m/s , mph , km/min |
| What is acceleration due to gravity? | the change in velocity caused by a gravitational force |
| Definition of acceleration | a change in velocity over time |
| Definition of velocity | the speed and direction of moving objects |
| What is the formula for Newton's Second Law? | Force= mass X acceleration |
| Definition of Newton's Third Law? | A pair of force acting on the two interacting object |
| The more mass an object has, the greater the ___ and ______ | speed ; acceleration |
| Definition of law of conservation of energy | energy stays constant |
| Definition of a wedge | a simple machine that can be used to split objects apart, hold objects in place, or lift objects from the ground; consists of two inclined planes joined together |
| Definition of compound machine | A machine consisting of two or more simple machines operating together |
| What is power measured in? | Power is measured in watts |
| Waves travel as long as they have ____. | Energy |
| The slower the ___, the longer the ____ | wave ; wavelength |
| Formula for sound wave | f = V / λ (speed divided by wavelength) |
| Definition of amplitude | height or "strength" of a wave |
| Calculate Kinetic Energy | 1/2 half of your mass (divide by 2) Time velocity squared Multiply them together |
| Definition of series circuit | an electric circuit in which the current follows a single path without branching |
| Definition of parallel circuit | an electric circuit with multiple paths through which current can flow |
| Definition of an insulator | a material that does not readily conduct electricity or heat |
| Definition of alternating circuit | electricity made by moving a magnet or coli; flows in 2 directions |
Created by:
jalynn.davis
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