Happy Birthday Mom! | October 9th, 2014
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| 1742644219 | How many different elements are there in a water molecule? | two | 0 | |
| 1742644220 | The chemical properties of matter come mostly from its | electrons | 1 | |
| 1742644221 | Compared to the mass of a hydrogen atom, the mass of an oxygen atom is | 16 times as great | 2 | |
| 1742644222 | The air in this room has | mass, weight, and energy | 3 | |
| 1742644223 | In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of | orbital electrons | 4 | |
| 1742644224 | Which of the following is not a compound? | air | 5 | |
| 1742644225 | There are only little over ... different kinds of atoms that combine to form all substances. | 100 | 6 | |
| 1742644226 | Molecules are the ... subdivision of matter that still retains chemical properties of a substance. | smallest | 7 | |
| 1742644227 | Which of these atoms has the most mass? | uranium | 8 | |
| 1742644228 | Which of the following are electrically neutral? | neutrons | 9 | |
| 1742644229 | In an electrically neutral atom the number of electrons is equal to the number of ... in the nucleus. | protons | 10 | |
| 1742644230 | A positive ion has more ... than electrons. | protons | 11 | |
| 1742644231 | Strip electrons from an atom and the atom becomes a ... ion. | positive | 12 | |
| 1742644232 | When a chocolate bar is cut in half, its density is ... | unchanged | 13 | |
| 1742644233 | Which has the greater density, a lake full of water or a cup full of lake water? | both are the same | 14 | |
| 1742644234 | If a loaf of bread is compressed, its density... | increases | 15 | |
| 1742644235 | If the mass of an object were to double while its volume remains the same, its density would ... | double | 16 | |
| 1742644236 | An iron block is placed in a furnace where it is heated and consequently expands. In the expanded condition, its density is ... | less | 17 | |
| 1742644237 | When a load is placed on the middle of a horizontal beam supported at each end, the bottom part of the beam undergoes | tension | 18 | |
| 1742644238 | The strength of a rope depends on its | thickness | 19 | |
| 1742644239 | Compared to the volume of a kilogram of feathers, the volume of a kilogram of lead is | less | 20 | |
| 1742644240 | Water pressure is greatest against the ... of the submerged object. | bottom | 21 | |
| 1742644241 | A dam is thicker at the bottom than at the top partly because water pressure is ... with increasing depth. | greater | 22 | |
| 1742644242 | The pressure in a liquid depends on liquid | depth and density | 23 | |
| 1742644243 | Pumice is a volcanic rock that floats. Its density is ... than the density of water. | less | 24 | |
| 1742644244 | The reason that buoyant force acts upward on a submerged object is that upward pressure against the bottom is ... than downward pressure against the top of the submerged object. | greater | 25 | |
| 1742644245 | A completely submerged object always displaces its own ... of fluid. | volume | 26 | |
| 1742644246 | When an object is partly or wholly immersed in a liquid, it is buoyed up by a force ... to the weight of liquid displaced. | equal | 27 | |
| 1742644247 | Which of the following is not a mixture? | none lolwot | 28 | |
| 1742644248 | The buoyant force on an object is least when the object is ... submerged. | partly | 29 | |
| 1742644249 | The reason a life jacket helps you float is the density of both you and the jacket together is ... than your density alone. | less | 30 | |
| 1742644250 | A lobster crawls onto a bathroom scale submerged at the bottom of the ocean. Compared to its weight above the surface, the lobster will have an apparent weight under water that is | less | 31 | |
| 1742644251 | A rock suspended by a string weighs 5 N out of water and 3 N when submerged. What is the buoyant force on the rock? | 2N | 32 | |
| 1742644252 | An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, one concludes the density of salt water ... the density of egg. | exceeds | 33 | |
| 1742644253 | Ice cubes submerged at the bottom of a liquid indicate that the liquid is ... dense than ice. | less | 34 | |
| 1742644254 | When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the high-density water of the Dead Sea, the buoyant force that acts on you is ... to your weight. | equal | 35 | |
| 1742644255 | When a boat sails from fresh water to salt water, the boat will float ... in the water. | higher | 36 | |
| 1742644256 | When an ice cube in a glass of water melts, the water level | stays the same | 37 | |
| 1742644257 | Atmospheric molecules do not fly off into outer space because of | earth's gravitation | 38 | |
| 1742644258 | A balloon is buoyed up with a force equal to the ... of air it displaces. | weight | 39 | |
| 1742644259 | A 500N blimp hovers in the air. The buoyant force acting on it is | 500N | 40 | |
| 1742644260 | The air in this room has | mass, weight, and energy | 41 | |
| 1742644261 | Airplane flight best illustrates | Bernoulli's principle | 42 | |
| 1742644262 | When gas in a container is squeezed to half its volume, its density ... | doubles | 43 | |
| 1742644263 | An umbrella tends to move upwards on a windy day principally because air pressure is ... over the curved top surface. | reduced | 44 | |
| 1742644264 | In a vacuum, an object has no | buoyant force | 45 | |
| 1742644265 | When you touch a cold piece of ice with your finger, energy flows from your ... to the ice. | finger | 46 | |
| 1742644266 | Which of the following normally warms up fastest when heat is applied? | iron | 47 | |
| 1742644267 | The fact that a thermometer "takes its own temperature" illustrates | thermal equilibrium | 48 | |
| 1742644268 | Before ice can form on a lake, all the water in the lake must be cooled to | anything equal to or greater than 1 | 49 | |
| 1742644269 | Ice tends to form first at the ... of bodies of water | surface | 50 | |
| 1742644270 | Consider a sample of ice at 0 degrees C. If the temperature is decreased, the volume of the ice | decreases | 51 | |
| 1742644271 | Consider a sample of water at 0 degrees C. If the temperature is slightly increased, the volume of the water | decreases | 52 | |
| 1742644272 | When water at 4 degrees C is heated it expands. When water at 4 degrees C is cooled, it | expands | 53 | |
| 1742644273 | The fact that desert sand is very hot in the day and very cold at night is evidence that sand has a ... specific heat. | low | 54 | |
| 1742644274 | Pour a liter of water at 40 degrees C into a liter of water at 20 degrees C and the final temperature of the two becomes | at or about 30 degrees C | 55 | |
| 1742644275 | If the specific heat of water were lower than it is, ponds in the cold of winter would be ... likely to freeze | more | 56 | |
| 1742644276 | Evaporation is a cooling process because the ... energetic molecules are able to escape the liquid. | more | 57 | |
| 1742644277 | Steam burns are more damaging than burns caused by boiling water because steam | gives up additional energy when it condenses and has more energy per kilogram than boiling water. | 58 | |
| 1742644278 | When a gas is changed to a liquid state, the gas | releases energy | 59 | |
| 1742644279 | When a solid is changed to a liquid state, the solid | absorbs energy | 60 | |
| 1742644280 | When liquids change to a solid state, they | release energy | 61 | |
| 1742644281 | Which could burn the most? | 100 g of steam at 100 degrees C | 62 | |
| 1742644282 | When heat is added to boiling water, its temperature | does not change | 63 | |
| 1742644283 | For increased atmospheric pressure, the boiling temperature of a liquid | goes up | 64 | |
| 1742644284 | Near the top of a mountain, water in an open pot boils at a ... temperature than at sea level. | lower | 65 | |
| 1742644285 | Suppose you walk on red-hot coals with bare feet. If bits of the coals do not stick to your feet, it would be best if your feet are | wet | 66 | |
| 1742644286 | Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up | faster | 67 | |
| 1742644287 | Food cooked in boiling water at a mountain top cooks slower than when cooked at sea level. If the temperature under the pot of boiling water is increased, the food will cook no differently than it did before the ... | increase | 68 | |
| 1742644288 | Melting snow ... the surrounding air | cools | 69 | |
| 1742644289 | When water vapor condenses on the inside of a window, the room becomes slightly | warmer | 70 | |
| 1742644290 | Ice is put in a cooler to cool the contents. To speed up the cooling process, the ice can be | covered with salt | 71 | |
| 1742644291 | Two equal-sized buckets are filled to the top with water. One of the buckets has a piece of wood floating in it, making its total weight ... to the weight of the other bucket | equal | 72 | |
| 1742644292 | Heat energy is measured in units of | joules and calories | 73 | |
| 1742644293 | When an iron ring is heated, the hole becomes | larger | 74 |
