Science

Refine Search

Why are planets round?

As these particles of dust and gas clumped together, they continued to attract matter and grow larger until there was no longer any further material to attract. These growing planets swept up any debris like giant vacuum cleaners. Their round shapes were caused by gravity that pulled in an equal direction to the center of these large masses. Any protrusions were pulled back into the center creating the shape of a ball.\nBefore the invention of the telescope, scientists used careful observations and the naked eye to record the sky. The first visible planets observed were Saturn, Jupiter, Mars, ..

Continue Reading

Where can you find significant quantities of acetic acid?

Acetic acid is produced organically through fermentation and synthetically from methanol. Glacial acetic acid is a clear, colorless liquid. However, it crystallizes at temperatures below 62 degrees Fahrenheit. Skin contact with pure acetic acid can cause redness, pain, blisters and burns. Eye contact can cause redness, pain and blindness. Breathing in fumes from acetic acid can bring on headaches, dizziness, sore throats, breathing problems and coughing. If swallowed, it causes nausea, vomiting and dental erosion.\nUse of acetic acid in food, drugs and personal care products is regulated by th..

Continue Reading

What is mycelium?

Soil and other types of substrate often contain large colonies of mycelium. This vegetative state of fungi reproduces asexually, releasing spores at certain periods of its life cycle to form additional fruiting bodies. Mycelium give fungi the ability to take in nutrients from the environment using facilitated transfusion and active transport. Mycelium is extremely important to both terrestrial and aquatic environments due to its role in plant decomposition.

Continue Reading

How are clouds formed?

Cloud formation involves a series of processes that cause water droplets or ice crystals in the atmosphere to form into clouds. Cooling of air is a part of these processes. Warm air is capable of holding more water vapor than cool air, which means that extra water vapor starts to condense into liquid water droplets when air starts to cool.\nWater vapor typically needs a condensation nuclei, such as dust and pollen. Eventually, water vapor condenses upon these condensation nuclei to form a cloud. The droplets that comprise a cloud are extremely tiny, and they are light enough to float in the ai..

Continue Reading

What is green waste disposal?

Green waste is relatively clean and will not take up large amounts of space in area landfills. The biodegradable materials assist in extending the life of local landfills and improve incinerator performance during energy recovery.\nWaste Management, a leading recycler and waste management company, asks consumers to place grass clippings, weeds, pruned branches and leaves into 96-gallon green waste carts. Long branches should be cut into lengths of 4 feet or less.\nGreen and eco-friendly waste disposal techniques reduce the greenhouse gases that lead to global warming. They also reduce landfill..

Continue Reading

What countries have flags on the moon?

In addition to the manned U.S. moon landings, there have been unmanned landings by the former Soviet Union, China, Japan, India and the European Space Agency. These craft all carried emblems of their countries of origin. For example, the Indian craft was painted with the Indian flag and was intentionally crashed into the lunar surface at the conclusion of its mission, in essence putting India's flag on the moon. As for the American cloth flags, Buzz Aldrin witnessed the first flag planted being knocked over by the rocket blast carrying him and Neil Armstrong off the lunar surface. As of 2..

Continue Reading

How does a hydra move?

The educational website Biology Corner says hydras are a type of cnidarians, a phylum of tentacled, stinging water-dwelling life forms that includes sea anemones and jellyfish. The hydra lives in freshwater ponds, eating tiny organisms like brine shrimp that come a little too close to the tentacles. It grows up to a half-inch in length, but it only grows when it is attached to a plant or the pond bottom. Some hydras reproduce asexually through budding, while other hydras produce eggs or sperm. Fertilized eggs fall to the lake bottom, where they lie dormant until conditions are appropriate for ..

Continue Reading

Are hazel eyes dominant or recessive?

All humans inherits from their parents two alleles, or forms of genes, that govern eye color. The HERC2 gene has two alleles, brown and blue. The other genes for eye color, the gey and bey2 genes, work together to dictate the different shades. Each person's eye color depends on which two alleles they inherit.\nThe brown HERC2 allele is dominant overall, so anyone that inherits a brown HERC2 allele will have brown eyes, no matter what the other allele is. The combination of bey2 and gey make brown, green, hazel or blue eyes. These different alleles dictate how much melanin to make, and mor..

Continue Reading

Where is glycogen stored in the body?

Although the amount of glycogen stored in muscles is only about 1 percent of their mass, muscle tissue contains about twice the amount of glycogen that the liver does because the amount of muscle mass in the body surpasses the mass of the liver.\nGlucose, a major source of bodily fuel, is stored in the form of glycogen. Excess glucose can be converted into glycogen, the storage form of glucose in animals. When the body senses a need for more glucose, the hormone glucagon is released and acts on the liver to convert glycogen back to glucose for use.

Continue Reading

Why is photosynthesis important to humans?

Photosynthesis is a process that occurs in plants. Plants use the energy they receive from sunlight to convert water and carbon dioxide into glucose. Plants use this glucose to create their own energy, storing excess glucose in plant tissues for later use. Oxygen is released as a waste product of this process.\nHumans breathe in oxygen and eat the glucose stored in the plants. They convert these chemicals into energy, carbon dioxide and water in a process called respiration. The carbon dioxide and water are released back into the atmosphere, providing plants with the necessary ingredients for ..

Continue Reading
Showing 1751 to 1760 of 10000 (1000 Pages)