Human Population Growth

Demographic transition is change from high birthrates and high death rates to

• exponential growth.
• low birthrates and low death rates.
• low birthrates and high death rates.
• indefinite growth.

About 500 years ago, the world’s population started

• decreasing.
• to reach carrying capacity.
• growing more rapidly.
• to level off.

The anticipated human population by the year 2050 is about

• 7.8 billion.
• 9 billion.
• 9 trillion.
• 78 billion.

Most of the worldwide human population is growing exponentially because

• human populations have not reached their exponential curve.
• most countries have not yet completed the demographic transition.
• human populations do not conform to the logistic model.
• the food supply is limitless.

According to Figure 5–4, which year had the highest number of live births per thousand of population?

• 1900

• 1990

• 1910

• 1940

In which year was the ratio of births to deaths at its lowest point, according to Figure 5–4?

• 1900

• 1990

• 1910

• 1940

In general, what is happening with population growth?

• The population is decreasing.

• The population is increasing.

• The population is stable.

• There is no change.

Using Figure 5–6, describe the type of growth Mexico is experiencing.

• Mexico is experiencing a rapid growth rate because there are more children than adults.

• Mexico is experiencing no growth because people are living longer.

• Mexico is experiencing slowed growth because there are fewer adults.

• Mexico is experiencing a rapid decline because there are more children than adults.

What three factors can affect ANY population's growth rate?

• Birthrate, death rate, migration
• disease, predation, migration
• medicine, agriculture, industry
• life expectancy, sanitation, vaccines

Which one of the following is NOT a characteristic of the carrying capacity?

• The carrying capacity changes as the environment changes.
• The carrying capacity is the number of individuals the environment can support.
• The carrying capacity is determined only by the density-dependent factors.
• Birth rate is equal to the death rate at the carrying capacity.