Science

Refine Search

What are a fox's natural predators?

The red fox is the most abundant of fox species. It lives everywhere in the Northern Hemisphere and has even spread into Australia in recent years. The red fox typically eats a varied diet consisting of birds, rodents, carrion and fruit. Their bodies are built for agility and speed and they hunt during the day.\nFoxes are the perfect size to be hunted by animals such as eagles, wolves and other medium-sized predators. Farmers consider foxes to be pests, but they are important in controlling crop-eating animals, such as rabbits and rodents.

Continue Reading

Is glycerin flammable?

A flammability rating of 1 means that glycerin must be preheated before it can ignite. It must be thoroughly heated and must be very hot to catch on fire. Although it does have such a low flammability rating, it is still a combustible liquid and can become ignited under the right conditions.\n\nDespite the fact that is both combustible and flammable, glycerin is not known to be harmful to humans. It is water soluble and is not difficult to eliminate if it were to get on clothing or skin. Although it is not harmful in its own state, glycerin can cause irritation to skin and eyes and can be fata..

Continue Reading

What are the physical and chemical properties of vinegar?

The properties of vinegar, especially its physical qualities, vary depending on the type and amount of minerals, vitamins, fiber and organic compound used for its production. These elements produce slight variations in color, level of acidity, and nutritional value. The chemical formula of vinegar is one of its basic chemical properties. Chemical formula refers to the chemical composition of acetic acid since vinegar is essentially a dilute solution of this acid. A single molecule of acetic acid contains two carbon, four hydrogen and two oxygen atoms. Density is a physical property, defined as..

Continue Reading

What is a day planner?

Day planners allow the user to track deadlines, appointments, meetings and other important dates. The to-do section of the planner serves as a running list of tasks to complete.\nHard-copy planners come in a variety of sizes, from small books that fit in a pocket to full-size books similar to notebooks. Day planners typically come with a spiral binding along the edge to allow the book to open up completely.\nSome day planners include a section in the front for contact and reference information. The book covers at least one year, with sections for each month. The beginning of each monthly sched..

Continue Reading

How do you tell if something is real crystal?

Crystal can be recognized by its shining silver hue, compared to the clean transparency of glass. Crystal also tends to have rounder and smoother cuts than glass. Glassware rarely contains lead, whereas crystal contains at least 24 percent. Typical glassware is made from around 50 percent sand, which explains why crystal is more durable than glass.

Continue Reading

How does chromatography work?

For a chromatographic analysis, two phases are used to determine the behavior of the compounds that form a mixture. As the stationary phase remains immobile, the mobile phase transports the sample that needs to be analyzed. A compound that has a high affinity for the stationary phase takes longer to leave the system, while a compound that has a high affinity for the mobile phase is flushed through very quickly. Sometimes, analytical instruments are paired with chromatography to provide accurate, highly detailed results.\nThere are several chromatographic methods that are used to identify and s..

Continue Reading

What is the definition of "kingdom" in biology?

At one time, only five kingdoms existed, with the Archaebacteria and Eubacteria being placed in one kingdom: Monera. This single kingdom exhibited so much diversity that it has since warranted division into two kingdoms.\nThe Archaebacteria are bacteria that live in inhospitable regions of the world, such as hot thermal vents. The Eubacteria consists of the other types of bacteria, many of which have contact with humans. The protists are single-celled organisms that can usually move on their own. The fungi consist of organisms that are single celled, have cell walls and obtain their food throu..

Continue Reading

What two colors mix together to make brown?

Brown is considered a tertiary color because it can be made by mixing a primary color (red) with a secondary color (green). The three primary colors are red, yellow and blue, and the three secondary colors are orange, green and purple. Because neither black nor white is on the color wheel, the method of mixing black and orange may be less desirable.

Continue Reading

How many electrons are there in a sulfide ion?

Ions are formed when an atom of an element gains or loses electrons, creating a mismatch between the number of electrons and the number of protons. Since electrons carry a negative charge, having more electrons than usual gives an atom an overall negative charge. Sulfide's charge makes it a strong base, as it can easily recombine with hydrogen to take in a proton and balance its electronegativity. Bases in general are molecules that easily donate electrons, and sulfide has two to offer, making it rather reactive.

Continue Reading

Why do liquids have different viscosities?

Viscosity is defined as resistance in the flow of a liquid. Liquids with molecules that are large, oval or disc-like and have tighter molecular links have higher viscosities (that is, are thicker and flow more slowly) than those with small and spherical molecules that are not tightly linked. High temperature decreases the viscosity of liquids, because an increase in temperature decreases the force of attraction between molecules.

Continue Reading
Showing 8141 to 8150 of 10000 (1000 Pages)