Science

Refine Search

What form of energy is stored in fossil fuels?

Fossil fuels include coal, oil and natural gas. They exist as nonrenewable resources, meaning once depleted, their reserves never replenish. Development of Earth's fossil fuels dates back millions of years. These fossils formed from the decomposing remains of plant and animal matter. Coal comes specifically from plant remains, while animal matter creates the other fossil fuels. The energy initially stored in these finite fuels classifies as light energy but undergoes transformations over time and with exposure to air and heat.Plants and animals initially comprising fossil fuels derived en..

Continue Reading

What are man-made disasters?

Emphasis on environmental responsibility has contributed to increased public awareness of man-made disasters. Global warming is widely viewed as a man-made disaster resulting from the use of chemicals that cause an increase in airborne pollutants. Excessive harvesting of trees for manufacturing has contributed to reduced oxygen levels and a shortage of trees in some parts of the world.

Continue Reading

What things are made out of copper?

Copper has been used for thousands of years, and it exists as a pure element in a variety of forms. Pure copper has a reddish color, while oxidized copper has a turquoise color. The properties of copper are conductivity, malleability and resistance, and this metal provides the lowest electrical resistance next to silver. It is also very ductile and easily drawn into thin wires.\nCopper ores are much more abundant than native copper and are the major source of copper worldwide.\nCopper is used in numerous alloys, such as brass and bronze. When combined with other metals, this transition metal i..

Continue Reading

What is earth leakage?

Earth leakage in uncontrolled amounts can be potentially dangerous. It can lead to a rise in voltage, damaging the conducting parts. To detect and control ground leakage, technicians rely on a device known as an earth leakage circuit breaker (ELCB). If a leak is detected, the ELCB automatically cuts of the power supply to the appliance. There are two major kinds of ELCBS: current earth leakage circuit breakers and voltage earth leakage circuit breakers.

Continue Reading

Does a fungus have a nucleus?

Most species of fungi are multicellular organisms. They are heterotrophs that must find their own food. Many fungi act as decomposers in their environment. They break down organic matter from organisms that are dead or dying and are considered to be the main source of decomposition for an ecosystem.Fungi feed by secreting an enzyme that digests their food and then absorbs the nutrients. This process is called extracellular digestion. To get to a food source, a fungus grows towards it.

Continue Reading

What are some tall-growing plants?

Hollyhocks are tall-growing herbaceous perennial plants that grow up to 8 feet in height and 2 feet in width with saucer-shaped blooms in various colors ranging from red to yellow and pink. Hollyhocks prefer well-drained soil and full sun to thrive.\nCommon rose mallow is a type of woody perennial flower that reaches heights of up to 10 feet and widths of 3 feet. The plant produces flowers up to 8 inches in width in crimson, white or pink colors. The blooms last from summer through fall. The plant requires full sun and moist soil.\nAlternate leaf butterfly bush is a fast-growing shrub that gro..

Continue Reading

What are some facts about Gregor Mendel?

Mendel was born on July 22, 1822 on his parent's farm in Austria. He lived in a rural environment until he was 11. Throughout his education, he awed scholars with his high level of aptitude for most subjects. Sadly, Mendel's education took longer than expected because he suffered from deep depression for long periods.\nMendel did not take over his father's farm as expected. Instead, he joined the Augustinian order at the St. Thomas Monastery in Brno to become a monk. Mendel failed his teaching certification exam in 1851. Nevertheless, the monastery offered him a secondary school..

Continue Reading

How does the circulatory system maintain homeostasis?

The circulation of blood is vital in maintaining homeostasis, which is the regulation of the internal conditions of the body, as described in scientist David Darling's Encyclopedia of Science. Blood carries food to cells and removes waste products.The circulatory system comprises the heart, veins, capillaries and arteries. The system moves oxygenated blood in a continuous and controlled way from the lungs and heart so that blood reaches every cell. Blood travels through a network of vessels that include capillaries that permeate every tissue of the body. Once depleted of oxygen, the blood..

Continue Reading

Is an Arctic fox a good pet?

The silver fox can reach 20 inches in height at the shoulder and weigh over 20 pounds. It is a capable jumper and digger. Owners of the silver fox are advised to have deep-set fences in order to prevent escape. Like other foxes, the silver fox is omnivorous. High-quality, grain-free dog food combined with occasional vegetables and fruits provides a balanced diet for the silver fox in captivity.

Continue Reading

What is the function of microvilli?

The HyperPhysics resource states that the microvilli play an especially crucial role in the human small intestine. Microvilli are attached to the collections of cells known as villi that extend from the tissue of the small intestine. They work to dramatically increase the amount of surface area available for the digestive process. The microvilli extend the surface area to such an extent that absorption can occur on an effective surface area of around 250 square meters. Any given cell can have either microvilli or cilia, which are larger slender extensions, attached to it.

Continue Reading
Showing 801 to 810 of 10000 (1000 Pages)