Science for Beginners: A First Book in General Science for Intermediate Schools and Junior High Schools |
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Common terms and phrases
amount atoms baking baking soda body boiling bread burn called carbon dioxid cents chemical action chemist chlorin coal color compounds contains copper crystals dish dissolved distance earth electric elements energy evaporating evaporating dish Exercise 9 experiment fact feldspar flame flame test flour force friction gases glass gluten hand heat hold hydrochloric acid hydrogen inches iron kind learned lever lift light lime limestone limewater liquid litmus paper machine magnet match material matter metal method mineral molecules motion move needle nitrogen Notice object oxid oxygen particles passes pendulum phosphorus piece plants pole potassium potassium chlorate potatoes pounds prism produced quartz rays rocks scientist soap soda sodium soil solid solution starch stone storm substance sugar sulfuric acid surface temperature test tube thermometer tion tricity vibration waves weight wind wire wood yeast zinc
Popular passages
Page 257 - The evaporation of the water takes up heat, and (3) If heat is required, must the object which furnishes the heat become colder? (4) Does salt water freeze at a lower temperature than water that contains no salt? Exercise 7. Place a small, tightly corked vial of sweetened cream (water may be used for a " make believe " sweetened cream) in the midst of the dissolving ice and salt. What happens? What would you have if you should do this on a large scale ? If you should find the vial broken, how would...
Page 112 - ... chemistry. Some one has said that the state of civilization at which a nation has arrived may be measured by the amount of soap consumed. In England there are manufactured over 50 pounds per year for each man, woman, and child. In America the rate is very nearly as high. Before any conclusion is reached by putting these statements together, it should be noted that England sends a large amount of her soap to America, and that Germany, France, and Holland do the same. History of soap and soap making....
Page 350 - A tool is but the extension of a man's hand, and a machine is but a complex tool. And he that invents a machine augments the power of a man and the well-being of mankind.
Page 132 - ... furnish heat and to give energy to the muscles, while the proteins are the foods that are by dissolving potassium iodid in water and then dissolving the iodin in this solution.. Two parts of iodin and 15 parts of potassium iodid to 100 parts of water will make a solution of the right strength.
Page 178 - ... foods. Raw starch is not easily digested, and hence potatoes and other vegetables and green fruits should be thoroughly cooked. In ripe fruits most of the starch has been changed to sugar, which, because it is readily soluble, is easily digested without cooking. A mealy boiled potato is, in fact, near akin to a lump of sugar; for the potato, like all forms of starchy food, must be turned into a kind of sugar before it can be absorbed into the system. Color of the potato. Another important thing...
Page 28 - I am the daughter of earth and water, And the nursling of the sky ; I pass through the pores of ocean and shores ; I change, but I cannot die...
Page 228 - ... any of the examples of motion which were studied in the last chapter. The waves of the sea, the light that comes to our eyes, the sound that strikes our ears, and the waves that carry the wireless telegraph messages across the sea are all the result of motion of this kind. The pendulum and its vibration. A pendulum consists of a weight so suspended as to move freely (Fig. 138). The distance from the point of suspension to the center of the weight is the length of the pendulum. Let us study the...
Page 174 - ... of the living forms of this little kingdom of life ; or hand it to the botanist, well trained in the lower orders of plants, and see how many of the living forms which these few handfuls of dirt contain he can classify. Present this miniature farm to the chemist and the physicist, and let them puzzle over it. Call in the farmer, and ask him what plants will thrive best in it; or keep the soil warm and moist for a time, and have the gardener say of the tiny plants that appear as by magic which...
Page 2 - Knowledge gained and unified by exact observation and correct thinking, especially as methodically formulated and arranged in a rational system/
Page 254 - FIG. 156. 254 -wo' 212'they are marked. The two scales most commonly employed are the Fahrenheit and centigrade.* Exercise 4. Test the graduation of your thermometer, as follows : Place several coarse pieces of ice in a dish containing pure water and allow it to stand for a few minutes. Stir the ice in the water thoroughly to make the temperature the same in all its parts. Now place the thermometer in the water and note the temperature. If you are using a centigrade thermometer, the temperature should...