Science Quiz

The air you breathe in from the atmosphere is made mostly of:

• oxygen

• carbon dioxide

• nitrogen

• argon

A reintroduced population of wolves in a national park is 90 percent gray and 10 percent black, consistent with the wolf population in other regions. After several generations in isolation, the national park's wolf population is 60 percent gray and 40 percent black. The wolf population has likely experienced

• natural selection

• genetic drift

• mutations

• migration

The lowest layer of Earth's atmosphere, the one directly above the ground, is called the:

• troposphere

• stratosphere

• thermosphere

• mesosphere

Radiation, conduction, and convection are the three main methods of:

• calculating relative humidity

• modeling climate

• transferring heat

• generating wind

When energy is transferred between trophic levels, the amount of available energy lost is about:

• 90%

• 50%

• 25%

• 10%

Humans are generally

• carnivores

• herbivores

• omnivores

• detritivores

Giraffes, lions, zebras, hyenas, and all the other living things of the Serengeti make up a(n)

• ecosystem

• population

• community

• biosphere

Every spring, many species of birds travel north to the Arctic to breed, and in the fall travel south again for the winter. This is an example of

• immigration

• migration

• emigration

• hibernation

A population of wolves is reintroduced into Yellowstone National Park. For the first decade, the wolf population grows exponentially. Then, the population growth slows. The new pattern is known as

• logistic growth

• limiting factors

• carrying capacity

• exponential growth

Rocks, soil, water, and oxygen are all _______ factors in the Sierra Nevada ecosystem of California.