Science

Refine Search

What is the ability to cause a change in or to move matter?

Objects that possess energy because of their ability to move have kinetic energy. Potential energy is the energy of a body or system based on its position or arrangement of particles. According to\nDictionary.com, the most important property of energy is that it is conserved, which means that the total energy of an isolated system does not change with time. This property is known as the law of conservation of energy. Even though energy does not change with time, it does change form, such as when it turns into a mass and back into energy again.

Continue Reading

What is the difference between a forest and a wood?

Like forests, woods are also areas in the wild, but they are much smaller. In a forest, natural sunlight barely comes through the canopy of trees, whereas sunlight is abundant in a wood. A wood has a dense growth of trees that is typically larger than a grove but smaller than a forest. Forests are either deciduous or evergreen in nature, and they are large areas where there are many animals. Trees in forests and woods grow thickly, with shrubs, underbrush and grasses flourishing between them. According to the U.S. National Vegetation Classification system, trees with overlapping crowns form 60..

Continue Reading

What is the tissue that lines the trachea?

Of the four tissue types inside the bodies of humans, the epithelial tissue is the most prolific. The other tissue types include connective tissue, muscle tissue and nervous tissue.Ciliated columnar epithelial cells line the tracheal, bronchial and the pulmonary systems in humans. It is also in the fallopian tubes in females. These epithelial cells have cilia. Cilia are hair-like protrusions on the rectangular shaped epithelial cell.

Continue Reading

What gases do we breathe in and out?

Earth's atmosphere at sea level is approximately 78 percent nitrogen gas by volume. The second most common gas is oxygen, which makes up 20 to 21 percent of the atmosphere by volume. Other gases are present in much lower proportions, with argon making up around 1 percent and carbon dioxide around 0.5 percent. Trace amounts of hydrogen, ozone, water vapor and noble gases such as helium and neon are also present.\nThe exact proportions of gases vary according to elevation, location and humidity. Areas with higher humidity have a greater proportion of water vapor. The proportion of oxygen de..

Continue Reading

What are examples of the use of distillation in current practices?

Distillation is a process used for centuries to refine a substance to a useful product. The impurities in the compound burn off in the process of purification. In water purification, water heats to the boiling point and the vapor collects for the pure mineral. In solar distillation of water, a simple still can heat the water placed in the sun. The vapor from the distillation will be mineral and salt-free.

Continue Reading

What is the hardest material on earth?

Carbon atoms like to form honeycombed sheets with each corner anchored by a carbon atom. Also, carbon is the only atom that can have four electrons in the second shell that surrounds the carbon nucleus. This allows carbon to create extremely symmetrical and stable crystalline structures. The only natural substance that can break apart the bonds carbon atoms make to form diamonds is another diamond.

Continue Reading

What material is used in plastic bags?

In this process, the polythene is molded to form a thin tube, where air is then injected inside to blow out a thin plastic-like sheet in the form of a bubble. A fan on top of the machine blows air on the created film to continuously cool the plastic and the tube is stretched out to create thin sheets. This can then be molded to create the shape of a plastic bag by a cutting and perforation process.

Continue Reading

Where can you buy Bentonite?

Natural health practitioners use bentonite to detoxify the skin and body. It can be applied as a paste to the skin or taken internally via a powder, drink mix or pill. Users of bentonite clay claim it treats eczema, psoriasis, digestive issues and dental problems.\nThe United States, France and Italy are the main locations where bentonite clay is harvested. The clay was named after the location of the largest deposit, Fort Benton, Wyoming.

Continue Reading

What does current balance mean?

At both SunTrust Bank and Santander Bank, all transactions, including cash deposits at a branch, cash withdrawals from an ATM, debit card purchases and any holds, only affect the available balance during a particular banking day, while the current balance remains unchanged. At SunTrust Bank, checks are processed nightly and do not affect the available balance, but at Santander Bank, check holds explicitly affect the available balance.

Continue Reading

What is a hypertonic environment?

When a cell is placed in a hypertonic environment, there are two ways the concentration of the solution inside the cell can be balanced with the concentration of the solution outside the cell. If the dissolved substance can pass through the cell membrane, then it moves from the area of higher concentration outside the cell to the area of lower concentration inside the cell until equilibrium is reached. If the dissolved substance can't pass through the cell membrane, then water moves from the inside of the cell to the outside of the cell until the concentrations are equal. This movement of..

Continue Reading
Showing 301 to 310 of 10000 (1000 Pages)