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Final Exam Review
T. EasterlingPhysical science Semester 1 review
| Question | Answer |
|---|---|
| items that let some light pass through and other light to bend are? | Translucent |
| Objects are colorless in the dark | because light has to strike the object, and then the object will reflect certain wavelengths. |
| When light hits a convex lens what causes the light to bend and change directions | refraction |
| Convex lenses do what? | gather light and focus it inward into 1 smaller point( like a magnifying glass) |
| Concave lenses do what? | gather light and spread it outward to make the beam wider(cover more area) ex: flashlight |
| If you use a thermos to keep soup warm by preventing what energy transfer? | thermal energy |
| when you get cold and put on the sweater, why do you feel warmer | the sweater is an insulator so keeps heat from escaping |
| Which container will make ice melt faster? An insulator or a conductor? | Conductor |
| As frequency and energy go up, what happens to the wavelength? | gets shorter/smaller |
| as frequency decreases the wavelength | increases |
| when an electromagnetic wave is inside a vacuum, what characteristic is not affected? Wave speed, wavelength, frequency, energy | wavespeed stays the same |
| list the energy conversions created when you plug in a lamp and turn it on | electrical energy is converted to light energy |
| why does a car "run out" of gas? | gasoline's chemical potential energy is converted to mechanical (kinetic) energy by the car |
| what happens when a piece of wood is burned completely | matter is converted to ash and gasses |
| in a car, chemical potential energy of gas is converted to kinetic energy to run the car- what is the excess energy given off as? | Heat and sound energy |
| what happens to a rock as it rolls down a mountain | kinetic energy increases and potential energy decreases |
| a pendulum has the most potential energy at what parts of it's swing | furthest left and furthest right. |
| elements in the same (family/period) have the most similar physical and chemical properties | family ( up and down columns) |
| a necklace is made up of an element that has 79 protons, what is the chemical symbol of this element | Au- gold |
| what type of matter cannot be broken down physically or chemically | elements |
| which side of the periodic table are the metals located | to the left of the zig zag line on the periodic table |
| what makes one element different than another? | the number of protons, electrons, and neutrons it has |
| water- H2O is considered a what? Element, compound, molecule | molecule |
| You have a salad, koolade, and some salt on your table, which one is a pure substance? | salt |
| you are given a clear liquid- you leave it alone for 3 days and when you return there is only a solid substance left in the bottom of the glass. What was the original sample? A pure substance, a mixture, filtration, or a precipitate | mixture |
| a solid is added to water...bubbles were produced- what type of reaction was produced? Chemical or physical? | a chemical reaction, a gas was produced |
| when heated, what happens to the particles of matter? Do they speed up or slow down | speed up |
| 2 grams of baking soda is added to a balloon, which is then placed over the top of a flask containing 3 grams of vinegar. The balloon is tipped over and the flask dropping the soda into the vinegar. What is the total mass of the solution created | 5 grams |
| 3 liquids of different colors are poured into the same glass beaker, after 1 minute- substance A is collected at he bottom of the beaker. What do we know about substance A? | It has a higher density than the other substances. |
| name the main characteristics of metals | shiny, malleable, conducts heat and electricity |
| what is density? | mass divided by volume |
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tknatt1
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