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Final Exam
final exam
| Question | Answer |
|---|---|
| what is the formula for density? | mass ÷ volume |
| Particles in a ________ move faster than liquids and solids | gas |
| Particles in a ________ move slower than liquids and gasses | solid |
| a bond formed when atoms are sharing electrons | covalent bonds |
| how many electrons are needed in the outer energy level (valence electrons) for atoms to be stable | 8 |
| What would the correct product be after the equation was balanced? ____Ca + ___ O2 ___ CaO | 2Ca + O2 2CaO |
| a substance that increases the rate of a chemical reacion | catalyst |
| a fundamental principle of science stating that mass cannot be created nor destroyed | law of conservation of mass |
| what are signs of chemical reactions? | color changes, temperature change, change in smell |
| chemical reaction that gives off heat energy | exothermic reactions |
| a change in the position of an object compared to another object | motion |
| mph ; m/s ; km/min | label for speed |
| the change in velocity caused by a gravitational force | acceleration due to gravity |
| change in speed over a certain time | acceleration |
| speed in a given direction | velocity |
| What is the acceleration of a 10 kg object with a force of 200 N? | 20 m/s^2 |
| formula for Newton’s 2nd Law | Acceleration= force divided by mass |
| every action there's an equal and opposite reaction | Newton’s 3rd Law |
| the more _______ an object has, the greater the speed and acceleration | mass |
| energy that stays constant | law of conservation of energy |
| simple machine used to split objects apart or hold them in place | wedge |
| machine consisting of two or more machines working as one | compound machine |
| Power is measured in ________? | watts |
| Waves travel as long as they have _____? | energy |
| The slower the wave, the _____ the wavelength | longer |
| frequency of a sound wave using the formula | frequency = speed/wavelength |
| height or strength of a wave | amplitude |
| 1/2 (mass) x velocity 2 | formula to calculate kinetic energy |
| electric circuit in which all the electric parts are on one line from positive to negative terminal | series circuit |
| an electric circuit with multiple paths through which current can flow | parallel circuit |
| materials that do not allow electrons to flow easily | insulator |
| electricity made by a moving magnet or coil | alternating circuit |
Created by:
hunter cormier
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