ScienceIQ.com

Eating Disorders

Eating is controlled by many factors, including appetite, food availability, family, peer, and cultural practices, and attempts at voluntary control. Dieting to a body weight leaner than needed for health is highly promoted by current fashion trends, sales campaigns for special foods, and in some activities and professions. Eating disorders involve ...

Continue reading...

EatingDisorders
Chemistry

How Sublime

Show of hands. How many of you can't resist playing with dry ice? Dry ice is carbon dioxide frozen to -109.3 degrees F (-78.5 C). Throw a piece in water and it bubbles and boils. Expose a piece to air ... Continue reading

DryIce
Chemistry

The Melting Point

Physical properties of a material fall into two categories: intrinsic properties determined by the structure of the particular molecule, and bulk properties characteristic of quantities of molecules ... Continue reading

TheMeltingPoint
Biology

The Rapid Movement of the Soybean Rust Pathogen

Soybean rust, caused by the fungus Phakopsora pachyrhizi, results in soybean yield losses of up to 80%. Rust diseases are named for the orange powdery spores produced in leaf pustules. They are easily ... Continue reading

SoybeanRustPathogen
Biology

Will That Be One Hump or Two?

Camels are highly adaptive to their environments. Often called the ships of the desert, they have been domesticated by humans for thousands of years, as beasts of burden and as transportation. What ... Continue reading

Humps

Is the Dead Sea really dead?

IstheDeadSeareallydeadThe Dead Sea is located on the boundary between Israel and Jordan at a lowest point on earth, at 400 meters (1,320 feet) below sea level. All waters from the region, including the biggest source, the Jordan River, flow into the Dead Sea where there are hardly any outflows short of ground based sink holes and evaporation. This makes it the saltiest and most mineral-laden sea in the world.

The salt concentration is so great, (about one third of salt per weight of water), that fish introduced into the sea by the Jordan River die almost instantly. Only bacteria and halophytes (plants that grow in salty soils) survive. White salt crystals form at the bottom and on the edges of the sea. This high salinity, and hence high density of the water, makes the Dead Sea one of the greatest swimming pools in the world. Even if you don’t know how to swim, don’t worry, you will be able to effortlessly float in the Dead Sea.

The latest measurements indicate that Dead Sea may be in trouble. Namely, the surface level of the water is retreating by 3 feet (90 cm) each year. Many believe that the problem lies in insufficient volume of water flowing into it from the Jordan River due to its overuse by the urban areas. Will the Dead Sea one day be called the Dry Sea? Time will tell.