habitat loss

1. 1. Which of the following magnifies all the other effects of other factors causing species decline/extinction: A habitat loss B human population growth C pollution of the air and water D introduction of invasive species

2. 2. The disappearance of a particular population within an area, but not globally defines: A extinction B critically endangered C habitat loss D extirpation

3. 3. Which of the following is a reason for the high amount of biodiversity found near the equator: A a variety of temperatures allowing for many different niches B a consistent topography allowing for many mountain-dwelling niches near fresh water lakes C a consistent daily amount of light to feed the base of the food chain D a consistent low temperature due to the specific heat of salt water

4. 4. All of the following are reasons why scientists are unsure of the actual number of species on the planet, EXCEPT: A Many terrestrial species are highly migratory & difficult to keep track of B Many species are tiny and inconspicuous C Some areas remain little explored D Some species are very similar in appearance

5. 5. The global population in 2050 is likely to be around A 6.7 billion people B 7.5 billion C 7.8 billion D 9.2 billion

6. 6. In the 1950's the global human population was between: A 2 and 3 billion B 4 and 5 billion C 6 and 7 billion D 9 and 10 billion

7. 7. Prior to the existence of humans, how many mass extinctions have occurred? A 3 B 5 C 20 D 42

8. 8. Which of the following is NOT a major cause of species extinction A Captive breeding B Habitat destruction C Human population growth D The introduction of invasive species

9. 9. Cryoconite holes are started by: A Soot, ash, and other dark-colored material that is put into the atmosphere, and then travels to poles where it is deposited on ice B invasive and migratory mammals that travel the poles searching for food and shelter C tent poles and other human tools that are used to secure materials to the surface of a glacier D a capstone species such as a sea otter being removed from a ecosystem, causing collapse of the food chain

10. 10. The calving face of a glacier can be found: A where a glacier meets the ocean B the highest point of the glacier where the most ice is deposited C mainly in Greenland & Alaska D in moulins cut through glaciers by melted ice

11. 11. Which of the following accurately defines an invasive species: A a species that it introduced into an area & quickly outcompetes native species B a species that takes over an area once its predators have been hunted to extinction C an apex predator that overexploits its food sources D a species that develops a plague-like disease that is spreads to other similar species