2. How do you explain the relationship between the UV Index and latitude? (In other words, why does UV intensity change with latitude?) The answer has to do with the angle of Earth relative to the sun. Latitudes at the equator receive direct sunlight year-round.

Why does UV intensity change with latitude quizlet?

As UV increases so does the darkness of skin color as you go higher up the latitude scale, UV exposure decreases thus darker skin is not needed. UV increases closer to the equator and decreases closer to the poles.

Why does intensity change with latitude?

Sun light falls almost vertically in equator. But as latitude increases the angle of inclination change and so same light is spread on large area.So intensity reduces.

What is the relationship between the UV index and latitude?

LATITUDE affects UV radiation, which is strongest at the equator and declines toward the poles. ALTITUDE affects UV radiation; UV increases about 2% for every 1,000-foot increase in elevation due to thinner mountain air.

What affects UV intensity?

Factors affecting the UV Index, such as the sun elevation, total amount of ozone in the atmosphere, cloud cover, reflection from snow and local pollution, are also discussed. Information about it can be useful for helping people avoid excessive levels of UV radiation.

Does the amount of UV light reaching the Earth vary in a predictable manner if so describe the pattern you observe quizlet?

pattern you observe. It does vary in a predictable manner. It varies based on the orientation relative to the sun: the closer to the equator, the more UV radiation.

When you travel north from the equator what generally happens to the intensity of UV light?

If you travel north from the equator, what generally happens to the intensity of ultraviolet light? The intensity decreases. You just studied 5 terms!

What changes the sun’s intensity at different latitudes?

The angle of incoming solar radiation influences seasonal temperatures of locations at different latitudes. At higher latitudes, the angle of solar radiation is smaller, causing energy to be spread over a larger area of the surface and cooler temperatures.

What is the relationship between latitude and the intensity of light hitting the Earth?

1. The intensity of insolation increases, as the angle of insolation gets closer to 90 degrees. 2. The intensity of insolation decreases with an increase in latitude.

Is the sun more intense at higher latitudes?

The sun’s rays strike Earth’s surface most directly at the equator. This focuses the rays on a small area. The lowest latitudes get the most energy from the sun. The highest latitudes get the least.

Does UV destroy folate?

Ultraviolet radiation can, however, destroy folate. Folate is important for the rapid growth of cells, especially during pregnancy where its deficiency can cause neural tube defects.

How does skin color correlate with UVB rays?

Stronger UV radiation is correlated with darker skin color. Data suggest that variation in human skin melanin production arose as different populations adapted biologically to different solar conditions around the world.

What causes skin to tan?

The increase in skin pigment, called melanin, which causes the tan color change in your skin is a sign of damage. Why it happens: Once skin is exposed to UV radiation, it increases the production of melanin in an attempt to protect the skin from further damage.

What factors increase or decrease UV exposure in different areas?

Seven factors affecting solar UV radiation

• Solar elevation. Where the sun sits in the sky determines the level of UV radiation reaching us.
• Ozone.
• Cloud cover.
• Ground surface reflectivity.
• Altitude.
• Aerosols and pollutants.
• Direct and diffuse UV.

How does elevation affect UV radiation levels?

At high elevations, the atmosphere thins and is less able to absorb U.V. radiation. With every 1000-foot increase in height, according to the National Institutes of Health, U.V. levels increase by about 4%.

Does UV Index affect tanning?

It is important to remember that, in practice, no UV index is truly good for tanning. The NHS warns that a “healthy tan” does not really exist, spending long periods of time in direct sunlight is not recommended, no matter the UV index value, as any tan can increase the risk of developing skin cancer.