ESRM 100 EXAM 1- UW

ESRM 100 EXAM 1- UW Please answer correctly, as it will be graded. The subject of this course is ___________. - Environmental Science The addition of a limiting nutrient to a body of water may lead to an algal bloom. What effect will this algal bloom have on the oxygen content of the water? - The algal bloom will cause first an increase, then a sharp decrease in oxygen If women delay child bearing, - the growth rate will decrease The levels of complexity include, from least to greatest: - Individual-- population-- community-- ecosystem-- biosphere ______% of the world's most developed population consumes ______% of the world's energy - 20;58 A close interaction be between two different species, in which one species benefits and the other is unaffected, is called - commensalism The change in genetic composition of a population over time is called: - evolution A null hypothesis is used as a statement that an experiment must disprove. A scientist wished to test whether fish species A prefers cold water over warm water. Which of the following is the best null hypothesis for the experiment? - Fish A has no preference for cold water over warm water Atmospheric convection currents are caused by - the unequal heating of the Earth by the Sun, and the tendency of warm air to rise Environmental justice is - a social movement that works toward equal enforcement of environmental laws in poor communities Evidence of biodiversity is seen most directly in the - number of species in a region Which type of species would be most vulnerable to environmental changes? - Niche specialists A hypothesis must be - testable What is a positive effect of upwelling? - it creates an area of high nutrient levels along the coast Which type of population distribution can enhance protection from predators? - clumped distribution An individuals ecological footprint is - a measure of the total amount of land required to the support that person's lifestyle Organisms that eat dead or decaying matter are called - scavengers An idea that has been repeatedly tested and confirmed by multiple groups of researchers is called a - theory Nitrogen fixation is a process - by which organisms convert nitrogen gas into ammonia Deforestation can result in - the rapid flow of water down mountains, leading to increased erosion and flooding Which of the countries presents the highest infant mortality rate? - Tanzania Which of the following correctly lists substances from highest to lowest PH? - household bleach-- seawater-- rainwater-- stomach fluid Which element is the most abundant in the atmosphere? - Nitrogen Which of the following countries has the highest ecological