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Where are prevailing westerlies located?

These winds are referred to as westerlies because they originate in the west and blow toward the east. The winds are often stronger in the Southern Hemisphere because there is less land in the middle latitudes to slow them down. Land can cause wind to amplify, or become more oriented toward the north and south, and slow the westerlies. The area known as the Roaring Forties, or between 40 and 50 degrees in latitude, can often have the strongest westerly winds.

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Is oxygen an element?

Oxygen is classified as a nonmetal on the periodic table. At room temperature, it is found as a diatomic element in the form of O2, which is a gaseous compound. The element was first discovered in 1774 by Joseph Priestly and Carl Willhem Scheele. Both scientists discovered the element independently around the same time period; however, only Priestly is typically given credit by the scientific community for the discovery.

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What is space tourism?

As of February 2015, fewer than 10 space tourists have successfully traveled into outer space, each paying more than $10 million for the privilege of being shuttled to locations such as the International Space Station. Private companies are working on research and development to bring the price of space travel down, though it will likely never be very accessible to most of the public. \n\nSpace tourism suffered a major setback when a shuttle belonging to Virgin Galactic, a division of the same company that runs Virgin Airlines, crashed during a test flight in 2014, highlighting the inherent da..

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When does divergent evolution occur?

Divergent evolution occurs due to habitat changes, alterations in a primary food source, interbreeding or any change that dramatically alters the way in which a species survives. This occurs for any species, including different plants and animals. Both artificial selection and natural selection produce divergent species. One example of divergence includes the emergence of humans from its ape ancestors as a response to the need of bipedal stature.

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What are some types of lung capacity experiments?

Begin by placing a strip of masking tape from the bottom to the top of the jug, according to the Science Museum of Minnesota. Fill the jug with water in increments of 250 milliliters. Mark the jug to reflect each increment, such as 250 milliliters and 500 milliliters, until it is full. Fill the plastic tub with 58 centimeters of water. Cover the opening to the jug, placing it upside down in the tub without letting any water escape, and hold it upright. Insert the vinyl tubing into the jug to a depth of about 810 centimeters. Insert the straw into the dry end of the tubing, instructs the Scienc..

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What is a non-living organism?

Non-living things are divided up into two groups: those that have never been living such as stones and gold, and those that were once living things, such as coal. Coal was formed when trees died, and sank into the ground. Accordingly, coal is a non-living organism that was once living.

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What is the Lewis structure of XeO4?

Each line represents a pair of bonded electrons. Each dot represents a valent electron, which is an electron in the outer shell of the atom. Counting each dot as one electron and each line as two electrons, the total number of electrons represented in the Lewis structure should equal the total amount of valence electrons in the molecule.

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How do parabolic dunes form?

In places where sand cover is thin and the wind blows in a constant direction, barchan dunes are the most common type observed. Barchan dunes require free-flowing sand to form and are therefore not as common as parabolic dunes. To form a classic parabola, the sand in a dune must be at least somewhat held in place by living vegetation.\nAs the wind blows over a sandscape, grains begin to accumulate in a ridge. In places where wind patterns are complex, star dunes form. If wind is comparatively steady, however, a vegetated area may erode into a cup-shaped depression. Sand from inside this depres..

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Why do plants produce their own food?

The process by which plants turn carbon dioxide, sunlight and water into glucose is photosynthesis. Photosynthesis occurs in the leaves of the plant. Chlorophyll, a green pigment in the leaves, helps the plant absorb sunlight. Meanwhile the roots pull water and nutrients from the soil and send it to the leaves through tissues called xylem. The undersides of the leaves have tiny pores called stomata through which the plant breathes in carbon dioxide.\nOnce the water, carbon dioxide and sunlight reach the leaves, a chemical reaction results. The sunlight powers the process of photosynthesis, spl..

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When is a good time for space station sightings?

At SpotTheStation.NASA.gov, visitors can sign up for free email or text message alerts that give several hours' notice from when the space station is scheduled to be visible from a location. This service only notifies subscribers when the space station is going to be high enough in the sky to see for a long period of time. Depending on the location, sighting opportunities can emerge anywhere from twice a week to once a month.

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