Science Source General Science

Meteorite, Allende. Type III Carbonaceous chondrite, magnification 25x. Polarized light micrograph of a section through a chondrule from a stony meteo...

Meteorite, Allende. Type III Carbonaceous chondrite, magnification 25x. Polarized light micrograph of a section through a chondrule from a stony meteo...

Meteorite, Allende. Type III Carbonaceous chondrite, magnification 25x. Polarized light micrograph of a section through a chondrule from a stony meteo...

Meteorite, Allende. Type III Carbonaceous chondrite, magnification 25x. Polarized light micrograph of a section through a chondrule from a stony meteo...

Human Cerebellum; 10x bright field.

Electrolysis of water using a Hoffman apparatus. Electrolysis uses an electrical current to decompose molecules of water. Reactions at the two electro...

A universal indicator changes color in test tubes filled with solutions of varying pH values.

An analytical balance, an instrument that measures mass to a high degree of precision, accounting for small factors such as dust and airflow.

An analytical balance, an instrument that measures mass to a high degree of precision, accounting for small factors such as dust and airflow.

Items containing transition metals: paint (titanium), wiring, copper plumbing, structural steel (iron), and gold.

The elements copper, sulfur, aluminum and mercury.

Calcium.

Consumer products made of aluminum.

Consumer products made of aluminum.

Water boils in a tea kettle, demonstrating physical changes in matter. Water (a liquid) is converted to steam (a gas) when it reaches its boiling poin...

Flame test - strontium chloride. A flame test is used to detect the presence of certain metal ions, based on each element's characteristic emission sp...

Flame test - sodium carbonate.

Carbon.

Bottle of sulfuric acid (H2SO4).

Bottle of nitric acid (HNO3). This is a strong acid, which means that it is highly dissociated in aqueous solution. Acids are chemicals that ionize in...

The back of an old rusted car.

Dry ice subliming.

Dry ice forms carbon dioxide bubbles when dropped in water.

Dry ice forms carbon dioxide bubbles when dropped in water.

Dry ice forms carbon dioxide bubbles when dropped in water.

Dry ice forms carbon dioxide bubbles when dropped in water.

Dry ice forms carbon dioxide bubbles when dropped in water.

Dry ice forms carbon dioxide bubbles when dropped in water.

Scale weighing a human hair (.0008 grams).

Mandelbrot abstract. Fractal geometry is used to derive complex shapes as are often found in nature. Complex patterns are produced by a series of repe...

Kinetic energy and momentum: "Slinky" toy "walks" down stairs.

Seen through diffraction grating (an optical component with a regular pattern which splits light into several beams traveling in different directions)...

Doughnut. One-third of life size. See 3c8130 and 3c8131 for others in the series.

Doughnut. Magnification: 1x. See 3c8130 and 3c8132 for others in the series.

Doughnut. Magnification: 5x. See 3c8131 and 3c8132 for others in the series.

Normal lens (left) vs. Pinhole lens (right). The pinhole lens has poor resolution (diffraction limited), but greater depth of field.

In pigment, mixing the additive primary colors red and green yields a brownish-black.

Mixing three additive primary colors (RGB) in light gives white at overlaps of three, and complementary (YMC) at overlaps of 2.

A Slinky toy walks down the stairs, a demonstration of kinetic energy and momentum.

Computer-generated model of aspartame (Nutrasweet), a synthetic sugar substitute.

Block of iron.

A 1928 penny with a bronze core, and a 1993 penny with a zinc core.

Projected additive primary colors (red, green, blue) produce white and shadow in subtractive colors (cyan, magenta, yellow).

Magnifying glass with prism shadow.

Titanium ingot. 8.5 ton ingot is cooled after molding in a plasma cold hearth.

Oil is poured into one jar, already half filled with water, and antifreeze is poured into another. The antifreeze dissolves; the oil does not.

Parts of a bomb calorimeter, a constant-volume calorimeter used to measure the heat of combustion of a particular reaction.

Arsenic, tin, gallium and germanium.

Different types of batteries.

The elements zinc and mercury. Both are transition metals.