Quiz 2 Weather
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Questions and Answers

What are the 3 mechanisms for heat transfer in the atmosphere?

Conduction, Convection, Radiation

Which mechanism involves the movement of the mass in a fluid?

Convection

Does warm air rise or sink?

Warm air rises. Air becomes less dense than cooler air so it floats upward.

Does cold air rise or sink?

<p>Cold air sinks. It is denser than warm air, its molecules are more tightly packed.</p> Signup and view all the answers

Why does rising air cool down?

<p>As air rises, the atmospheric pressure decreases.</p> Signup and view all the answers

Why does sinking air warm up?

<p>Sinking air warms up because as it descends the atmospheric pressure increases.</p> Signup and view all the answers

By which mechanism does heat from the sun reach the earth?

<p>Radiation</p> Signup and view all the answers

What variable determines the type and amount of radiation that a body emits?

<p>The temperature of a body determines the type and amount of radiation it emits.</p> Signup and view all the answers

Which emits more radiation, the sun or earth?

<p>The sun emits more radiation because it is much hotter</p> Signup and view all the answers

In what portion of the electromagnetic spectrum does the sun emit the most energy?

<p>The infrared portion</p> Signup and view all the answers

What part of radiation spectrum can our eyes see?

<p>Visible Light</p> Signup and view all the answers

When we see the moon, are we are seeing radiation emitted by the moon? If not what are we seeing?

<p>No, the moon doesn’t emit light but reflects the suns light.</p> Signup and view all the answers

When we see the sun, are we seeing radiation emitted by the sun? If not what are we seeing?

<p>Yes, we are seeing radiation emitted by the sun?</p> Signup and view all the answers

Evaporation

<p>liquid turning into gas</p> Signup and view all the answers

condensation

<p>gas turning into liquid</p> Signup and view all the answers

Melting

<p>solid to liquid</p> Signup and view all the answers

freezing

<p>liquid turning into solid</p> Signup and view all the answers

sublimation

<p>solid turning directly into gas</p> Signup and view all the answers

deposition

<p>gas turning directly into solid</p> Signup and view all the answers

What is latent heat?

<p>Energy absorbed or released during a phase change without change in temp, cannot measure with thermometer</p> Signup and view all the answers

What is Sensible heat?

<p>Heat that causes change in temp of a substance. Can be measured with thermometer</p> Signup and view all the answers

Why are carbon dioxide and water vapor called selective absorbers?

<p>They only absorb certain wavelengths of radiation, mostly infrared</p> Signup and view all the answers

4 important greenhouse gasses

<p>water vapor, carbon dioxide, methane, nitrous oxide</p> Signup and view all the answers

What is the greenhouse effect?

<p>When certain gases in the atmosphere absorb infrared radiation from the earths surface and traps heat</p> Signup and view all the answers

What is isolation?

<p>The amount of solar radiation received by a specific area over a specific period of time</p> Signup and view all the answers

What controls isolation?

<p>Latitude, Time of day, Season, Weather conditions</p> Signup and view all the answers

What is the shape of earths orbit around the sun?

<p>Elliptical, oval shape</p> Signup and view all the answers

What is the ecliptic?

<p>The tilt in the earths axis</p> Signup and view all the answers

What are the solstices?

<p>Summer Solstice in the summer, Winter solstice in the winter</p> Signup and view all the answers

What are equinoxes?

<p>Occur when earths axis is either tilted toward or away from the sun. Vernal equinox, Autumnal equinox</p> Signup and view all the answers

In july when it is ____ in the northern hemisphere, the north pole is pointing ____ the sun and everywhere in the northern hemisphere days are _____ than 12 hours

<p>Summer, Toward, Longer</p> Signup and view all the answers

In january when it is ____ in the northern hemisphere, the north pole is pointing ____ from the sun and everywhere in the northern hemisphere days are ____ than 12 hours

<p>Winter, Away, shorter than</p> Signup and view all the answers

In july when it is ____ in the southern hemisphere, the north pole is pointing ___ from the sun and everywhere in the southern hemisphere days are _____ than 12 hours.

<p>Winter, away from, shorter than</p> Signup and view all the answers

What regions of the earth receive a surplus of energy over the course of a year?

<p>Tropics</p> Signup and view all the answers

What regions of earth receive a deficit of energy over the course of a year?

<p>Polar regions</p> Signup and view all the answers

How is the excess of energy at lower latitudes moved poleward?

<p>Excess energy in the tropics is moved by circulation which helps balance the global temp.</p> Signup and view all the answers

What is albedo?

<p>The fraction of sunlight that is reflected by a surface, rather than absorbed.</p> Signup and view all the answers

What are the albedos of water, ice, snow, forest, and desert?

<p>The highest albedo is found in snow and ice, lowest is found in water</p> Signup and view all the answers

What is the average albedo of the earth as a whole?

<p>0.3, 30% of sunlight that reaches earth is reflected back into space, while the remaining 70% is absorbed</p> Signup and view all the answers

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