A tectônica de placas é uma teoria que explica a formação e a atual distribuição dos continentes na Terra. Sobre essa teoria, podemos afirmar que: as placas tectônicas apenas se afastam uma das outras, separando os continentes. as placas que se afastam umas das outras formam cordilheiras no fundo dos oceanos. as placas podem colidir entre si, e a mais nova delas é empurrada para baixo da mais antiga. ela substituiu a teoria da deriva continental, que foi abandonada completamente.

Q1: a country's crude death rate has declined as a result of medical advancements, but the crude birth rate remains steady. which of the following stages has the country most likely reached? stage 2 stage 3 stage 1 stage 4 stage 5 q2: which of the following countries may be heading into stage 5 of the demographic transition model? japan algeria yemen rwanda paraguay q3: how has the progression of saudi arabia on the demographic transition model differed from the progression of england? saudi arabia's transition between stages was much slower than england's transition. england transitioned to stage 3 after saudi arabia became a stage 3 country. saudi arabia has not yet reached stage 3 because fertility rates and population growth remain high. saudi arabia's birth rate dropped rapidly at stage 2, while england's continued to rise. england went back and forth between stage 2 and stage 3 several times. q4: an anti-natalist policy increases family size lengthens life expectancy lowers the crude birth rate reduces childhood mortality equalizes the sex ratio q5: which country is known for its one-child policy enacted in 1979? france mexico algeria china india q6: which of the following is an anti-natalist policy? tax credits for families childhood vaccination funding for birth control subsidizing child care increasing crop production q7: a country's government is concerned about its rapidly expanding population. which of the following solutions would be most effective? i. handing out free contraception ii. fining families with more than one child iii. encouraging politicians to only have one child as an example iv. offering tax breaks to families who choose to have only one child ii only iii only i and iii iii and iv i, ii, and iv