How many trees does it take to provide a day's supply of oxygen for 4 people? 1/10/50/100?

Nearly ________ percent of mammal species are globally threatened with extinction? a. 25 b. 3 c. 65 d. none of the above

How much of the Earth's land is covered by forests? 5%, 10%, 15% or 30%?

Just one plant may provide food and/or shelter to more than how many species of animals? a. 30 species b. 1 species c. 10 species d. none

Climate change affects the gender of sea turtles. True or false?

In what U.S. state are half of the world's bald eagles found? a. Alaska b. Texas c. California d. Wisconsin

How many species have disappeared in the last 500 years? a. 3,200 b. 1,250 c. 816 d. 362

1. An endangered species is _____________ that will become extinct if its populations continue to decline. a. any species of animal b. any species of plant c. any species of animal, plant, or other living organism d. none of the above

What percentage of crops are dependent on bee pollination in the U.S.? 100%, 90%, 65% or 30%?

What are the greatest threats facing endangered species? a. habitat destruction b. illegal hunting c. introducing new species that can cause problems d. all of the above

Of the 44,838 species that have been studied by scientists, about what percentage is threatened with extinction? a. 38% b. 89% c. 2% d. 15%

How can you help protect endangered animals from extinction? a. reduce, recycle, and reuse b. protect natural habitats c. landscape with native plants d. all of the above