Science Source General Science

Thermal expansion of gas. Experiment showing how gas expands with increasing temperature, a phenomenon known as Charles' Law. The experiment consists...

Knife and fork balanced on a match and hung on a cup rim. The head of the match is in the center of gravity of the system.

Sinusoidal waveform from tuning fork.

Sinusoidal waveform from tuning fork.

Neon (Ne) gas light.

Pith balls are small, lightweight objects that pick up electric charges well. Charged pith balls demonstrate Coulomb's law.

Strips of litmus paper illustrates the pH of an orange, which is acidic, and Drano, which is basic.

Triple beam balance, used to weigh.

Iodine sublimation. Iodine at room temperature is a black solid. Gentle heating results in the formation of a purple gas. This solid-gas transition is...

Sodium metal reacting with water.

Copper Penny reacting with nitric acid (HNO3).

Pile of sulfur.

Moth balls.

Water boiling.

Items made from Silicon (Si), lead (Pb), and tin (Sn).

Elements: Silicon (Si), tin (Sn), bromine (Br), and copper (Cu).

Dry ice blowing up a balloon. Image 1 of 6 in a series. The full series includes images 2m2208, 2s1834, 2s1833, 2m2214, 2s1832, and 2m2210.

Dry ice blowing up a balloon. Image 2 of 6 in a series. The full series includes images 2m2208, 2s1834, 2s1833, 2m2214, 2s1832, and 2m2210.

Dry ice blowing up a balloon. Image 5 of 6 in a series. The full series includes images 2m2208, 2s1834, 2s1833, 2m2214, 2s1832, and 2m2210.

Light emission from excited Argon (Ar) gases.

Light emission from excited neon (Ne) gases.

Magnesium ribbon burning.

Bromine (Br2) gas emission from a lamp.

Light emitting Carbon Dioxide (CO2).

Hydrochloric acid (HCl) and Ammonium hydroxide (NH3) reacting.

Computer generated molecular model of the poisonous nerve agent Tabun or GA (Ethyl N,N-dimethylphosphoramidocyanidate). This agent is used in chemical...

Household items with basic pHs: Drano, ammonia, dish soap and oven cleaner.

Magnesium metal reacts with oxygen to form magnesium oxide.

Three metal bars: steel, copper and aluminum.

Sodium acetate heat pad reacting (3 of 5). Sodium acetate is solid at 130 degrees F, but will exist as a liquid at a much lower temperature and is ext...

Sodium acetate heat pad reacting (4 of 5). Sodium acetate is solid at 130 degrees F, but will exist as a liquid at a much lower temperature and is ext...

Sodium acetate heat pad reacting (3 of 5). Sodium acetate is solid at 130 degrees F, but will exist as a liquid at a much lower temperature and is ext...

Sodium acetate heat pad reacting (2 of 5). Sodium acetate is solid at 130 degrees F, but will exist as a liquid at a much lower temperature and is ext...

Sodium acetate heat pad reacting (1 of 5). Sodium acetate is solid at 130 degrees F, but will exist as a liquid at a much lower temperature and is ext...

The carbon family consists of the five elements that make up Group 14 of the periodic table. Pictured are graphite (an allotrope of carbon), silicon,...

Copper reacting with nitric acid.

Portable pH meter.

Forms of graphite.

Titration of an acid in aqueous solution with a base. In this case the acid is hydrochloric acid (HCL), with phenolphthalein as an indicator, and the...

Conductivity of copper (II) sulfate. Bulb lights.

The bulb is connected to a battery and two electrodes, forming an incomplete circuit. Because the pure water does not conduct electricity, current doe...

Magnesium metal and hydrochloric acid react to fill up a balloon.

Barium flame.

Balancing a drill and a piece of wood.

Conductivity of copper (II) nitrate.

Zinc reacting in Hydrochloric Acid.

NaCl crystals in solution.

Salt crystals in solution.

Equilibrium of bromine. Image 4 of 4 in a series. Bromine is an element in which the liquid form easily vaporizes at room temperature. Bromine is a me...

Equilibrium of bromine. Image 3 of 4 in a series. Bromine is an element in which the liquid form easily vaporizes at room temperature. Bromine is a me...