El Niño Southern Oscillation events can cause flooding from both a rise in sea level and high
precipitation. Indicate whether the statement is true or false.
ANS: T
Sea level can rise up to 20 centimeters in the eastern Pacific during ENSO events. There is more
evaporation occurring due to the higher temperatures in the region which intensify the abnormal low
pressure conditions. This creates high precipitation. Information can be found in the section El Niño
and La Niña Are Exceptions to Normal Wind and Current Flow.
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Since 1942 the use of synthetic pesticides has increased 10-fold. In spite of this fact, food supply damage due to pests has increased during that time
Indicate whether the statement is true or false
According to the scientific method, a prediction
A) is a logical consequence that follows from the hypothesis B) leads to a hypothesis C) may not be made until an experiment has been performed D) always refers to something that will occur in the future
Erosion can result in a vicious cycle of worsening erosion because
A) rainwater increasingly soaks into the ground. B) the accumulation of humus makes erosion more likely. C) plants are less likely to grow in an eroded region. D) the pH of the soil increases as erosion continues.
Different isotopes of one element are chemically indistinguishable.
Answer the following statement true (T) or false (F)