ScienceIQ.com

What Makes a Frisbee Fly?

If you have ever been to the park or the beach, you've probably seen one of these plastic discs flying through the air. We're not talking about a UFO, we're talking about the Frisbee, more commonly known as the flying disc. What makes a Frisbee fly? Just like a bird's wing or the wing of an airplane, shape plays a large part in influencing the ...

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Frisbee
Chemistry

Fire Retardant Gels

Ultra-absorbent diapers, the kind that will hold massive amounts of liquids, have been used for years, without a second thought given to the materials within them. Let's face it; those materials ... Continue reading

FireRetardantGels
Geology

Plate Tectonics

In geologic terms, a plate is a large, rigid slab of solid rock. The word tectonics comes from the Greek root 'to build.' Putting these two words together, we get the term plate tectonics, which ... Continue reading

PlateTectonics
Geology

Igneous Rocks, Born of Fire

Rocks are naturally occurring solid mixtures of substances primarily made of minerals. There are three kinds of rock on earth - igneous, sedimentary, and metamorphic rock. Sedimentary rock forms from ... Continue reading

IgneousRocksBornofFire
Engineering

How We Use Crystals To Tell Time

Quartz clock operation is based on the piezoelectric property of quartz crystals. If you apply an electric field to the crystal, it changes its shape, and if you squeeze it or bend it, it generates an ... Continue reading

Crystals

California Condor

CaliforniaCondorArchaeological evidence indicates that condors have been revered by western Native Americans for thousands of years and played a major role in their legends and rituals. Condors were considered sacred and capable of providing communication with the supernatural world as well as supernatural powers. In more recent times, the California condor has become the subject of an intense and sometimes controversial effort to save the species from extinction. Faced with rapidly declining numbers, scientists began collecting wild-laid eggs and capturing free-flying birds to breed them in captivity with the goal of eventually restoring the condor to its rightful place in the California skies. California condors are the largest birds in North America. They may weigh up to 25 pounds and have wingspans of 9 1/2 feet.

California condors have bare heads and necks, dull gray-black feathers, and blunt claws. They have a triangle-shaped patch of white, visible only when airborne, that adorns the underside of their wings. California condors can soar on warm thermal updrafts for hours, reaching speeds of more than 55 miles per hour and altitudes of 15,000 feet. Normally, California condors do not become sexually mature until the age of 6 and may not start breeding until age 7 or 8. They nest in caves or clefts on cliffs that usually have nearby trees for roosting and a clear approach for easy take-offs and landings. Typically, an adult pair lays one egg every other year, with the fledgling being dependent upon its parents through the next breeding season.

Like all vultures, condors are carrion-eaters. They prefer large dead animals like deer, cattle, and sheep, but will also eat rodents and more rarely, fish. If a meal has been particularly big, they may have to spend hours on the ground or a low branch before they can take off again. Condors are fastidious birds -- after eating, they clean their heads and necks by rubbing them on grass, rocks, or tree branches. Condors also bathe frequently and spend hours preening and drying their feathers. Condors were probably never very numerous in North America. The species once ranged along the entire Pacific Coast from British Columbia to Baja California. For years, no one knew precisely how many California condors existed, although they have been considered to be a declining species since the 1890s. One estimate put their number at 100 in the early 1940s. Another indicated there were 50 to 60 in the early 1960s. By the late 1970s, the estimate had dropped to 25 to 30 birds.