Science

Refine Search

What is the difference between propane and butane gas?

Butane and propane are both odorless, colorless gases. Compressing the gases converts them into a liquid that is easily stored and transported in pressurized tanks. In rural areas, residents often use a mixture of the two gases, known as liquefied petroleum gas, as fuel for heating and cooking. Campers use small canisters of LP gas to operate stoves, lights and grills. The design of some automobiles allows them to operate using LP gas as a fuel. In the United States, LP gas is at least 90 percent propane with the remaining 10 percent composed of butane, ethylene and propylene. Manufacturers ad..

Continue Reading

What are some facts about marble?

Marble can be made from dynamic metamorphism, which happens with the movement of the Earth. It can also form from heat and pressure affecting large areas that may be the size of mountain ranges or from the effect of magma on the surrounding limestone.\nBesides calcite, marble can have accessory minerals, such as graphite and pyrite. It can contain accidental minerals, such as quartz, mica, chlorite, diopside, plagioclase and talc. Marble can come in a wide variety of colors and be full of veins and clouds, with a grain that ranges from fine to very coarse.\nMarble is prized as a building stone..

Continue Reading

How does temperature affect the rate of dissolving?

Using cocoa powder and placing it in a cup with boiling water can demonstrate temperature's effect on a solid's rate of dissolving, or its solubility in water. A second cup containing cold water and cocoa powder is used for comparison of solubility rates. The comparison demonstrates that the cocoa powder poured into a cup of boiling water dissolves more quickly than the powder placed in cold water.An example of the effects of temperature on gas dissolving in a liquid is opening a cold soda can and leaving it out at room temperature. After a time, the soda tastes flat due to a decreas..

Continue Reading

Why is light so important to us?

Light kick-starts food chains, both on land and in the sea. It acts as a catalyst during photosynthesis in plants, and it provides sustenance for the survival of plankton in the oceans. Both these forms of herbal life go on to provide nutrition to many species, including human beings.\nLight is the most important tool of guidance. Humans need light to see and go about daily activities. The invention of fire was man's attempt to substitute the light of the day while he fights the darkness of the night. Today, technological advancements allow people to exploit other beneficial uses of light..

Continue Reading

What are the pros and cons of whale hunting?

Whales listed as endangered or vulnerable include blue whales, gray whales, fin whales, North Pacific right whales, sei whales and sperm whales. Whales are killed with harpoons that explode inside their bodies, sometimes taking hours to kill them. Some scientists point out that whales have the large brains and brain cells present only in species with high intelligence. Economists state that whale watching is a billion dollar industry that brings in far more revenue than whale hunting, explains Whale and Dolphin Conservation.\nThough in 1986 the International Whaling Commission imposed a ban on..

Continue Reading

How much does the largest mammal weigh?

The blue whale is found in all oceans of the world, spending the summertime near the poles and in winter swimming to the equator. Blue whales communicate through pulses, groans and moans, able to be heard by other whales at a distance of up to 1,000 miles. An endangered species, the blue whale's future is compromised by the hunting done by man in the early-to-mid 20th century.

Continue Reading

How can calcium be reduced in the air?

Some of the most common sources of dietary calcium include dairy products, nuts, beans, some green leafy vegetables and lentils. Insufficient dietary calcium can lead to osteoporosis, while excess dietary calcium can lead to kidney stones.\nCalcium compounds are the primary cause of scale build-up on bathroom fixtures, in pipes and in hot water heaters. Many professionals recommend that homeowners use water softeners or periodically drain their hot water heaters to mitigate these problems.\nCalcium, the fifth most abundant element in the Earth's crust, is an alkaline earth metal, most com..

Continue Reading

How do chloroplasts move?

The amount of actin in a given cell determines how far the chloroplasts in that cell can move. Limited actin threads mean less responsive chloroplasts and thus leaves that appear less vibrantly green and that process the energy from light less effectively. Strong, lengthy actin threads haul chloroplasts around the inside of the cell so that they are always in the optimal position for shelter or for absorption.Actin growth is encouraged by certain proteins that occur naturally inside the cells of certain plants. These fibers then promote the plant's health and ensure its survival in unpred..

Continue Reading

What are the abiotic factors of the temperate deciduous forest?

All of the living and nonliving parts of an ecosystem have an effect on each other. In the temperate deciduous forest, the amount of sunlight available affects plant growth. If plants do not receive enough sunlight, they will die off or fail to thrive, leaving less food available for the animals in the ecosystem.\n\nThe climate of the temperate deciduous forest is another important abiotic factor affecting living organisms. Plant growth and animal survival are both affected when an ecosystem's temperature is too high or too low. Soil pH, water quality and the amount of rainfall the temper..

Continue Reading

What is the largest nebula?

Standard models of galaxy formation predict the growth of immense filaments of gas and dust between galaxies. Usually, this gas is difficult or impossible to see, as it does not produce light of its own. In the case of UM287, however, the intense light of its internal quasar renders its extensive structure visible.

Continue Reading
Showing 1871 to 1880 of 10000 (1000 Pages)