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Science Source General Science
979
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The elements magnesium and calcium. Both are alkaline earth metals.
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A fine mesh rests on water, demonstrating surface tension.
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Alkali metals. From left to right: Lithium (Li), sodium (Na) & potassium (K). These elemental metals are relatively soft and react rapidly with the wa...
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Color diagram (RBG light primary colors making white, cyan, yellow and magenta).
EN_90286235_0371
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Scene of a tree filled valley used to demonstrate normal color vision. This image is used in contrast to a similar image used to demonstrate color bli...
EN_90286235_0370
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Scene of a tree filled valley used to demonstrate "red blind" color blindness (protanopia). Color blindness is the lack of perceptual sensitivity to c...
EN_90286235_0369
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Scene of a tree filled valley used to demonstrate "green blind" color blindness (deuternopia). Color blindness is the lack of perceptual sensitivity t...
EN_90286235_0368
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Aluminum ingots.
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Rusty metal.
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Rusty metal.
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Titanium.
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Manganese.
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Pile of sulfur.
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A sample of selenium.
EN_90286235_0361
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A voltaic electrochemical cell. The left half-cell contains the anode, a zinc electrode immersed in a 0.050 M solution of Zn2+ ions. The right half-ce...
EN_90286235_0360
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Foam rubber; polyurethane foam. The air-filled matrix structure as shown here is created by manufacturing rubber with a foaming agent.
EN_90286235_0359
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Lead acid battery.
EN_90286235_0358
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Silicon.
EN_90286235_0357
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Chemical lab.
EN_90286235_0356
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A glass of ice water.
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Rusty truck.
EN_90286235_0354
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Water boiling in a beaker.
EN_90286235_0353
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Solubility demonstration. Spoonsful of sodium chloride are added to water. The mixture is in solution when the water can absorb all of the sodium chlo...
EN_90286235_0352
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Iron (111) Nitrate nonahyrdate.
EN_90286235_0351
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Iron (111) Nitrate nonahyrdate.
EN_90286235_0350
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A rose becomes hard and brittle after being dipped in liquid nitrogen. Part of a series including images 2V3268, 2Z0766, and 2Z0767.
EN_90286235_0349
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The pH of buffer remains constant no matter what the volume of the solution.
EN_90286235_0348
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A rose becomes hard and brittle after being dipped in liquid nitrogen. Part of a series including images 2V3268, 2Z0766, and 2Z0776.
EN_90286235_0347
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A rose becomes hard and brittle after being dipped in liquid nitrogen. Part of a series including images 2V3268, 2Z0767, and 2Z0776.
EN_90286235_0346
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The blue balloon contains low-density hydrogen, while the red balloon contains normal air.
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Acid-base titration. Demonstration of an acid-base titration using the indicator phenolphthalein. An alkaline solution is in the flask with a few drop...
EN_90286235_0344
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A balance weighing samples of brick and styrofoam.
EN_90286235_0343
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A balance weighing aluminium and copper.
EN_90286235_0342
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A propane flame boiling water.
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Water boiling over a propane flame.
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A handwarmer that uses the oxidation of iron as a source of heat. Image 1 of 2 in a series. See 2y9476 for the other in the series.
EN_90286235_0339
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A handwarmer that uses the oxidation of iron as a source of heat. Image 1 of 2 in a series. See 2y9477 for the other in the series.
EN_90286235_0338
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Water is warmed when a hotter object (a brass bar) is plunged into the water. Image 2 of 2 in a series. See 2y9420 for the other in the series.
EN_90286235_0337
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Phosphorus burns in Chlorine gas.
EN_90286235_0336
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Water is warmed when a hotter object (a brass bar) is plunged into the water. Image 1 of 2 in a series. See 2y9475 for the other in the series.
EN_90286235_0335
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A voltaic cell made by inserting zinc and copper electrodes into a watermelon. A potential of over 0.9 V is obtained.
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Group 4A elements: carbon, silicon, tin and lead.
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White precipitate of lead (II) chloride (PbCl2 - left) and potassium chromate (k2CrO4 - center) reacting to form lead chromate (PbCrO4 - right).
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The inside of an alkaline battery.
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The inside of a rechargeable nickel-cadmium battery.
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Rust on the Golden Gate bridge.
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Gold (Au), silver (Ag), and copper (Cu) that has been cast into small bunches (ingots) for further processing, easy shipping, or storage.
EN_90286235_0328
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Gold (Au) and silver (Ag) that has been cast into small bunches (ingots) for further processing, easy shipping, or storage.
EN_90286235_0327
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Transition metals, elements in the d-block of the periodic table.
EN_90286235_0326
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Filament in light bulb going from cold to white hot. Bulbs produce light from a filament, a fine tungsten wire which heats up and glows as an electric...
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