Exam 3: Seasonal and Daily Temperatures

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Because water heats and cools more slowly than land, the lag in daily temperature over water is usually much ____________________ than that experienced over land.

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Many gardeners know that, when a frost is expected, plants can be protected by covering them with large plastic tubs. Explain why this is an effective way of protecting plants from frost.

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An appropriate answer would be that small plants or shrubs may be protected from cold temperatures by covering them with straw, cloth, or plastic sheeting because this prevents ground heat from being radiated away to the colder surroundings. If you are a household gardener concerned about outside flowers and plants during cold weather, simply wrap them in plastic or cover each with a paper cup. On cold nights, certain crops can also be damaged by low temperatures. If the cold occurs over a widespread area for a long enough time to damage certain crops, the extreme cold is called a freeze.

If two cities have the same mean annual temperature, it means that their temperatures throughout the year are always similar.

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List several factors that determine how cold the air at night can become.

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During an equinox, the days and nights are of equal length except at the poles.

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In July, at middle latitudes in the Northern Hemisphere, the day is more than ____________________ hours long and is getting ____________________ with each passing day.

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Fruit trees are particularly vulnerable to cold weather ____.

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Farmers use an index called ____ as a guide to planting and for determining the approximate dates when a crop will be ready for harvesting.

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Because water has a high heat capacity, it cools more slowly than dry soil, and so the surface does not become as cold as it would if it were dry.

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What about the Southern Hemisphere somewhat offsets the extra insulation received due to a closer proximity to the sun?

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If tonight's temperature is going to drop into the middle 20s (degrees Fahrenheit)and a fairly stiff wind is predicted, probably the best way to protect an orchard against a hard freeze is to (assuming that cost is not a factor)____.

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Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the ____.

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At what time during a 24-hour day would a radiation temperature inversion best be developed?

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One would expect the LOWEST temperatures to be found next to the ground on a ____.

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On the winter solstice, the highest position of the noonday Sun is located ____.

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A growing degree day for a particular crop is defined as a day on which the mean daily temperature is ____ degree(s)above the base temperature (also known as the zero temperature )-the minimum temperature required for growth of that crop.

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Where on Earth would you expect to find the highest diurnal temperature, and why?

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Earth is tilted at an angle of 23.5 degrees with respect to the plane of its orbit around the Sun. If the amount of tilt were increased to 40 degrees, we would expect in middle latitudes ____.

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Explain the effects humidity has on diurnal temperature ranges.

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During the afternoon, the greatest temperature difference between surface air and the air several meters above occurs on a ____.

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