Science

Refine Search

How many pounds is 78 kilograms?

Both kilograms and pounds are used to measure the mass, also known as the weight, of an object. Pounds are most often used in the United States, but kilograms are commonly used in most other countries around the world. To convert pounds to kilograms, users should take the number of pounds and divide that number by 2.2046. One kilogram is also equal to 1,000 grams or one metric ton. One pound is equal to 16 ounces, 453.592 grams or 0.000453592 metric tons.

Continue Reading

What is clay made of?

Clay is formed from the weathering and erosion of rocks from the mineral group feldspar and is made of particles with a grain size of less than 4 micrometers. Clay is common and can be found all over the world. When wet, most clays can be molded and formed into shapes. When exposed to very high temperatures, clay can become as hard as stone. Clay is used to make various things such as bricks and pottery.

Continue Reading

What is the difference between the Kelvin and Celsius temperature scales?

For conversion, 0 degrees Kelvin is -273.15 degrees Celsius. Unlike temperature changes measured with the non-metric Fahrenheit scale, a 1-degree rise on the Celsius scale is identical to a 1-degree rise on the Kelvin scale.\nThe Kelvin scale is primarily seen in precise or academic measurements relating to the physical sciences. It is generally used in coordination with Celsius.

Continue Reading

What is HRSD?

HRSD collects household and business wastewater from 17 counties and cities and treats it to be reused or disposed. The water that it reclaims for reuse is not pure enough to drink. However, it is safe enough for many other activities, such as watering lawns and washing cars. HRSD promotes water reuse as a way to save money, reduce pollution and conserve drinking water.

Continue Reading

What is the enzyme in saliva?

One major function of salivary amylase is to break down some of the starch found in food and change it into a simple sugar called maltose. It also aids in protecting the general health of the mouth by helping to break down food particles caught in the teeth and preventing tooth decay. Another of its purposes is to help maintain the pH of the mouth within the basic range.

Continue Reading

How fast does the Earth orbit the sun?

In addition to the incredible speed Earth is traveling through space, the blue planet is rotating at an approximate 1,000 miles per hour at the equator and near zero at the poles. It is difficult to recognize the speed at which an object is moving unless one has a visual reference, so people do not notice how fast Earth is traveling. Gravity holds people and objects down so that they remain on Earth while it orbits.

Continue Reading

What kind of wave is light?

There are two broad categories of waves, electromagnetic and mechanical waves. Mechanical waves require the presence of particles, such as atoms and molecules, in order to transfer energy from one point to another. Electromagnetic waves, on the other hand, do not require the presence of a medium with particles in order to transfer energy.\nLight is the visible part of the electromagnetic spectrum, which comprises a range of different wavelengths of electromagnetic waves, most of which are not visible to the human eye. These invisible electromagnetic waves include X-rays, gamma rays, and infrar..

Continue Reading

What causes a drought?

Unusual warming or cooling of sea surface temperatures can create a change in air temperature. This change of air temperature can affect the location of convection currents responsible for weather patterns, shifting warmer air over previously cooler locations. Heated air pulls moisture from the soil, allowing it to form clouds and return to the Earth as rain when it enters the cooler upper atmosphere. If weather patterns shift enough to create an area with little rainfall over a period of time, there is not enough moisture in the soil to draw up into the air to create clouds once the weather p..

Continue Reading

What are some interesting earthworm facts for kids?

While there are more than 6,000 species of earthworms found around the world, the three species most common in the United States are the night crawler, anglerworm and rain worm. Night crawlers are an invasive species that leave the ground at night, while rain worms exit to crawl on sidewalks after a storm. Anglerworms are popular for fishing.\nIn the United States, earthworms range in size from 1/2 inch to 14 inches in length. However, in the tropics, some species of earthworms reach almost 10 feet in length. One earthworm found in South Africa, was 22 feet long. The normal lifespan of an eart..

Continue Reading

What are the five causes of microevolution?

It is possible for humans to observe microevolution in a population if the changes in allele frequencies cause major phenotypic divergence from the original population. For example, dog breeding, a type of artificial selection, has created major morphological and behavioral divergence in dogs. This has led to the large number and diverse set of dog breeds observed as pets.\nSelective pressure that leads to microevolution can also be seen in nature. This is known as natural selection. Natural selection occurs when an individual or group of individuals inherit an allele that provides a survival ..

Continue Reading
Showing 9141 to 9150 of 10000 (1000 Pages)