Explain how thunderstorms can occur at cold fronts
A cold air mass forces warm, humid air mass to rise rapidly. As the air mass rises, it cools and water vapor begins to condense. The process releases latent heat that powers continued uplift, creating strong instability and vertical updrafts.
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How is the rate of natural increase, also known as natural growth rate (NGR), for a country or region calculated?
A) It is estimated from migration records. B) using arable land C) taking the agricultural output and dividing it by the current population D) It is equal to GNP. E) the difference between the birth rate and the death rate
Since the fall of the Soviet Union, conditions in Russia have changed in what way?
a. birth rates have fallen b. death rates have risen c. quality of life has dropped d. population is declining e. all of these have occurred since the fall of the Soviet Union
The proposal that the coastline fit of South America and Africa was evidence of continental drift was criticized because it could have been due to what?
a. chance b. shoreline erosion c. the sinking of a land bridge d. ocean currents e. the distribution of resistant rock types
What are the trade winds, what are their general patterns in the tropics, and how do they contribute to Hawai'i's unique weather and climate?
What will be an ideal response?