Chapter 18 and 19 Study Guide

fossil fuel consumption

Decreasing ________ would have the greatest effect in decreasing greenhouse gases.

biotic; within

Humans are ________ factors ________ the biosphere.

human activities; abiotic

Increased carbon dioxide levels in the atmosphere have contributed to acidification of the oceans. This change of the water's pH due to a change in CO2 concentrations is an example of how ________ has/have affected a(n) ________ factor in the biosphere.

water and carbon cycles will be disrupted.

Scientists have started to record what happens to areas in the Amazon that have been burned. They are recording which plants grow back and how water and carbon cycles are affected by the new growth. They are also performing experiments to look for ways to encourage the return of rainforest. This work is significant because if the burned rainforests do not recover,

sinks

There are many deserts at 30° latitude because at this altitude, dry air

Human societies may experience severe disruptions in the services ecosystems provide on which human societies depend.

What will happen in the future if humans continue to impact natural systems at the same rates as today?

Human-caused global change occurs more quickly, leaving organisms less time to adapt.

Which of the following choices is a major difference between human-caused global change and that which occurs naturally?

decreased biodiversity

Which of the following is NOT a consequence of climate change?

biosphere

Which of the following terms describes all organisms on Earth plus their environments?

average rainfall

Which of the following would best be considered an aspect of climate?