Science

Refine Search

What do you call plants that don't have chlorophyll?

Broomrape and the Dodders simply don’t make chlorophyll by nature. Without chlorophyll in their tissues, they cannot make their own food. They live as parasites, stealing their food from other plant hosts.\nBroomrape attaches itself to the roots of clover plants, whereas the Dodders survive by living on clover, hop and nettles.\nBecause chlorophyll is what gives plants their color, plants without chlorophyll are usually not green. Instead, plants with chlorosis are often yellowish white or pale yellow.

Continue Reading

What is a formula unit?

For example, sodium chloride, more commonly known as table salt, can be expressed by the formula unit NaCl. Regardless of how many ions of sodium chloride are being used in a chemical equation, the formula unit for sodium chloride is the simplified expression of one sodium atom to one chlorine atom.

Continue Reading

How long is a year on the sun?

Scientists refer to the time it takes for the solar system to make a complete revolution around the center of the Milky Way galaxy as a galactic year. Estimates for the length of a galactic year range from 225 to 250 million terrestrial years. The sun also rotates. Based on the observation of sunspots, scientists have determined that the sun rotates once every 27 terrestrial days at its equator.

Continue Reading

What are some interesting facts about limestone?

Limestone is a type of sedimentary rock that originates in bodies of water where shells and bones of dead marine organisms accumulate. Over millions of years, pressure compresses the sediment into rock. Due to the presence of limestone in Michigan, Indiana, and Illinois, scientists believe these areas were once underwater. Limestone was used by the ancient Egyptians to build pyramids.

Continue Reading

What is the scientific name of a sunflower?

The seeds of the sunflower are often used for oil production as well as food, and the sunflower is an alternative crop in the Great Plains areas of the United States. The sunflower has two differing types of flowers: ray and disk. The ray flowers surround the edges of the plant, whereas the disk flowers are contained within the flower's center. The common sunflower was declared the Kansas state flower in 1903 due to its abundance in the area.

Continue Reading

What type of reaction links monomers to make polymers?

Monomers are structural units that serve as the fundamental building blocks of large-sized molecules called polymers. When monomers are covalently bonded, the polymerization process can be classified into three types: addition reaction, condensation polymerization and ring-opening polymerization. The polymers formed from this process are characterized by a soft, rubbery texture or a rigid consistency, which is comparable to cured epoxy. The synthesis of polymers may also result from the noncovalent linking of monomers in the form of hydrogen bonds, dipole-dipole interactions and London forces.

Continue Reading

What kind of shape do table salt ions form?

Table salt typically consists of quite small crystal cubes, but very large salt crystals are sometimes found in salt mines. No matter the size of the crystal, sodium chloride always breaks into cubes when struck by a hammer or other hard object. Due to ionic bonding, sodium chloride always has the exact same cubic crystal structure and the same properties, because sodium and chlorine can only bond in one way. The chemical formula for sodium chloride is NaCl.\nThe most common type of salt deposit is known as halite or rock salt, which occurs naturally in various places around the world. It rang..

Continue Reading

What minerals are used to make glass?

Glass is an amorphous, brittle substance that is similar to a "frozen liquid." It is characterized by an absence of long-range order, a substantial number of vacant sites and the lack of atomic planes.Glass is generally made from liquefied sand that is allowed to cool rapidly. Lime and soda are often mixed with the sand to change the internal structure of the glass. Other compounds such as aluminum oxide, magnesium oxide, boron oxide and lead oxide are also used as additives, which directly influence the properties and the type of glass formed.

Continue Reading

Why does predicted vital capacity vary with height?

Age, sex, height, weight and even race all play a factor into what a person's vital capacity is. These values are normally compared to already complied lists that the techs who administer the tests have access, too. This shows what a person of a certain set of factors should approximately have as test results. Since some minorities can differ from this information, their results may show up abnormal.

Continue Reading

What are osteocyte organelles?

Osteocytes are eukaryotic cells with the characteristics and organelles of other eukaryotic cells. Among these is the nucleus that contains genetic material. Although they have genetic material, osteocytes do not undergo mitosis because, according to How Stuff Works, osteocytes are old, retired osteoblasts. They continue to function but at a reduced level. Osteocytes have a life of 25 years before they are replaced by other osteocytes.\nThe mitochondria in osteocytes is another organelle. This one produces the energy that propels the cell. The endoplasmic reticulum organelle is involved in pro..

Continue Reading
Showing 8641 to 8650 of 10000 (1000 Pages)