Which color of visible light has the shortest wavelength?

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Presentation transcript:

Which color of visible light has the shortest wavelength? (3) yellow (2) green (4) red (1) violet

Earth’s atmosphere & Energy TO SUN TO YOU

Earth’s atmosphere is composed of gases

Which pie graph correctly shows the percentage of elements by volume in Earth’s troposphere?

Most energy hitting the atmosphere is Solar Radiation

Energy is transferred from the Sun to Earth mainly by (1) molecular collisions (2) density currents (3) electromagnetic waves (4) red shifts

Earth’s atmosphere is opaque to some solar energy. is transparent to some energy. traps some energy. This depends upon the condition of the atmosphere and the wavelength of energy. atmosphere

Which color do you NOT wear on a hot sunny day in July? Which type of land surface will most likely absorb the greatest amount of incoming solar radiation? (1) rough, dark-colored surface (2) rough, light-colored surface (3) smooth, dark-colored surface (4) smooth, light-colored surface Which color do you NOT wear on a hot sunny day in July?

The radiated heat energy is longer wave infrared light. Light energy heats Earth’s surface. The warm surface then radiates heat. The radiated heat energy is longer wave infrared light.

The radiated heat energy is longer wave infrared light. Light energy heats Earth’s surface. The warm surface then radiates heat. The radiated heat energy is longer wave infrared light.

What happens to the L O N G W A V E infrared radiation the land gives off? The atmosphere traps it like a blanket traps your body heat!

Shorter wavelength – mostly visible light passes through atmosphere Greenhouse Effect LONGER wavelength – mostly INFRARED light gets trapped by atmosphere.

Atmospheric gases that trap the infrared light energy are called “GREENHOUSE GASES”. Greenhouse Effect is natural. Human activity unnaturally increases these gases.

Why may this be a problem? Average surface temperatures have risen by about 1o C over the past century! Why may this be a problem?

Venus has 97% CO2 in its atmosphere, and is 470 oC (about 900 oF)! THE EXTREME CASE… Venus has 97% CO2 in its atmosphere, and is 470 oC (about 900 oF)!

Increasing the amount of carbon dioxide in Earth’s atmosphere increases atmospheric temperature because the carbon dioxide absorbs (1) incoming solar gamma ray radiation (2) incoming solar visible light radiation (3) outgoing terrestrial ultraviolet radiation (4) outgoing terrestrial infrared radiation