Exam 18: General Principles of Ecology

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,

Humans are ________ factors ________ the biosphere.

The graph below indicating average global temperature only shows recorded temperatures back to 1880.If there is a correlation between carbon dioxide levels and average global temperature,what would be expected if the average global temperature graph was extended back to the year 1500?

Not all gases are greenhouse gases.A greenhouse gas is a gas that

Increasing carbon sinks will ________ global warming and ________ climate change.

The graph below indicates that global temperatures have

How do trees in the Amazon act as both a carbon sink and a carbon source?

What trend is apparent when comparing the two graphs below?

Match the term to the correct example. -Earth

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

Biology is the study of life.Would biologists study abiotic components in an ecosystem?

One of the primary forces that causes atmospheric circulation is convection,which occurs when

Global warming occurs

A skeptic states that climate change may affect polar bears and other organisms,but not humans.Evaluate the validity of this statement.

Nonliving factors in the biosphere are called ________ factors.

Species that will most likely prosper as projected climate change occurs will

Cutting down trees in a forest can affect the flow of a river.This is an example of a(n)________ factor affecting a(n)________ factor.

Climate change will affect

During a debate on sustainability,a presenter states that humans do not need to protect the planet because our technology puts us outside of the biosphere.Evaluate the validity of this statement.

A friend notes that this winter was a particularly cold one and states that this is evidence that global warming is not occurring.Evaluate the validity of this statement.