Students in grades six through 12 can compete for a $100 gift certificate from Edmund Science Kit. The winner will be determined by a random drawing from entries with all the correct answers. Please send entries to MichiganScience@mackinac.org.

1. What percentage of Montmorency County’s wolf habitat is expected to be lost by 2050?

A. 80 percent.
B. 42 percent.
C. 23 percent.
D. None — wolf habitat is predicted to increase.

2. What are metabolites?

A. Chemicals from the environment that remain in the body forever.
B. Chemical markers that indicate past exposure to a certain compound.
C. Lamps powered by glowing algae.
D. Tiny fragments of meteor dust.

3. Which of the following tissues is least commonly used in biomonitoring?

A. Blood.
B. Urine.
C. Saliva.
D. Hair.

4. How many waste sites were identified in the Centers for Disease Control and Prevention’s abandoned Great Lakes study?

A. 24.
B. 71.
C. 4.
D. 15.

5. In 2001, how much did the CDC distribute in grant money for biomonitoring?

A. $10 million.
B. $25 million.
C. $100 million.
D. $1.3 billion.

6. How many pounds of PCBs were removed from the Shiawassee River in 1982?

A. 300.
B. 2,600.
C. 1,900.
D. 100,000,000.

7. How does Michigan’s 2007 rate of tuberculosis compare with the rest of the nation?

A. Half the national average.
B. Twice the national average.
C. The same as the national rate.
D. There were no cases of TB in Michigan last year.

8. How many Michigan ash trees have been killed by the emerald ash borer since 2002?

A. 2,000.
B. 2 million.
C. 30 million.
D. 4.6 million.

9. How old is supernova G1.9+0.3?

A. 400-1,000 years old.
B. 140-1,000 years old.
C. 1,000-5,000 years old.
D. 10,000-14,000 years old.

10. Which was not part of the megalodon’s diet?

A. Whales.
B. Fish.
C. Other sharks.
D. Plankton.