$\text{\red{Apply Concepts}}$ If every married couple in a country were to decide to have only one child, what would happen to the country’s population growth?

In the third stage of the _________, the birthrate and death rates are equal.

The industrial synthesis of methyl tert-butyl ether involves treatment of 2-methylpropene with methanol $\left(\mathrm{CH}_3 \mathrm{OH}\right)$ in the presence of an acid catalyst, as shown in the following equation.

methyl tert-butyl ether

This ether is used commercially as an antiknock gasoline additive. Using the curved-arrow notation, propose a mechanism for this reaction.

The graph below represents a. carrying capacity.$\hspace{2.3cm}$ c. logistic growth. b. exponential growth.$\hspace{2cm}$ d. age structure

The industrial degreasing solvent methylene chloride, $\mathrm{CH}_2 \mathrm{Cl}_2$, is prepared from methane by reaction with chlorine:

$$\mathrm{CH}_4(\mathrm{~g})+2 \mathrm{Cl}_2(\mathrm{~g}) \longrightarrow \mathrm{CH}_2 \mathrm{Cl}_2(\mathrm{~g})+2 \mathrm{HCl}(\mathrm{g})$$

Use the following data to calculate $\Delta H^{\circ}$ in kilojoules for the reaction:

$$\begin{aligned} &\mathrm{CH}_4(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) \longrightarrow \mathrm{CH}_3 \mathrm{Cl}(\mathrm{g})+\mathrm{HCl}(\mathrm{g}) \quad \Delta H^0=-98.3 \mathrm{~kJ} \\ &\mathrm{CH}_3 \mathrm{Cl}(\mathrm{g})+\mathrm{Cl}_2(\mathrm{~g}) \longrightarrow \mathrm{CH}_2 \mathrm{Cl}_2(\mathrm{~g})+\mathrm{HCl}(\mathrm{g}) \quad \Delta H^0=-104 \mathrm{~kJ} \\ & \end{aligned}$$

Name two ways in which animal behavior is related to environmental cycles.

The number of males and females of each age group in a certain population is called the ______.

$\text{\red{Interpret Tables}}$ Describe the trend in population growth since the 1-billion-people mark.

$\text{\red{Observe}}$ When did the world population reach billion people? When did it reach 6 billion?

$\text{\red{Compare and Contrast}}$ One small town is made up mainly of senior citizens. How would you expect this town’s population to change over the next several years? Compare this growth to that of a small town that is made up mostly of newly married couples in their twenties.

Describe the general trend of the human population growth over time.

What is the last stage of the demographic transition? a. The birthrate and death rates are both very high. b. The death rate is low, and the birth rate is very high.

What is the scientific study of human populations called?
a. immigration
b. emigration
c. demographic transition
d. demography

Refer to one or more details from the text to explain why Fisher concludes her analysis of the term "frustration attraction" with the exclamation "What irony!"