Unit Test — Unit test Answers

Ecosystems have trouble adjusting to short-term changes.

“In a 2009 study, presented by the National Academy of Science, 97% of climate scientists agree that human activity is causing global warming." Which of the following statements is best supported by this study? a. Most climate scientists dispute the theory of human influence on global warming. b. Global warming is most likely alarmist propaganda based on false data. c. Global warming is definitely not caused by human influence on nature. d. Most climate scientists believe that there is evidence that explains global warming. Please select the best answer from the choices provided

Why was the concern over global cooling replaced with a concern over global warming?a.The science community needed a cause to frighten the general population.b.Steady surface temperature increases were noted between the 1970’s and 90’s.c.Air pollution only became a concern in the 1980’s.d.Scientists observed severe ocean acidification.

Which best describes eras and periods?

Which best explains a primary reason for the inability of life to exist in Earth’s early atmosphere?

Habitat change occurs more frequently through natural causes than human activity.

Which of the following is the most likely cause for global climate change? a. a decrease in the overall temperature of the Earth b. an increase in the overall temperature of the Earth c. an increase in the number of cold climates d. no change to global climate Please select the best answer from the choices provided

All scientists agree that global climate change will happen rapidly.

Study the diagram of the geologic time scale.Which method is most likely used to identify what happened before the start of the Paleozoic era?

Which of the following is not true concerning the Pleistocene ice age? a. Earth began warming out of the ice age 18,000 years ago. b. Glaciers stopped advancing 15,000 years ago. c. Sea levels during the ice age were higher than today. d. Forests and grasslands became more common after the ice age. Please select the best answer from the choices provided

The increased ranges of plant and insect species resulting from climate change has only negative consequences.

Without the greenhouse effect the Earth would be _______ than it is today.a.warmerb.drierc.colderd.wetter

What does the geologic time scale confirm about the Cretaceous period?

Which event in Earth’s history most directly allowed life to exist on land?

Some scientists believe that global warming will bring about extreme weather.

Global warming is a theory accepted by a majority of scientists.

Climate warming trends allow plant and insect species to inhabit larger ranges.

Greenhouse gases are best described as _______.a.the result of fossil fuel useb.gases that cause the greenhouse effectc.carbon dioxide and methaned.gases that trap energy from the sun in Earth’s atmosphere

How can local environmental changes have global effects?a.Organisms can move from one environment to another.b.Air and water move from region to region.c.Increased carbon dioxide in one location can cause increased temperatures in other locations.d.All of the above are true.

Greenhouse gases are essential to support life on earth.