Questões do ENEM 2018

Questões aplicadas na prova de 2018, cada uma em página própria com enunciado, alternativas e gabarito.

Resultados

6.600 questões encontradas. Mostrando a página 300 de 330.

  • 17406BC0-CB

    Inglês

    Interpretação de texto | Reading comprehension
    UECE · 2018MédioEntre para guardar nos favoritos

                                               T E X T


          EL TIGRE, Venezuela — Thousands of workers are fleeing Venezuela’s state-owned oil company, abandoning once-coveted jobs made worthless by the worst inflation in the world. And now the hemorrhaging is threatening the nation’s chances of overcoming its long economic collapse.

          Desperate oil workers and criminals are also stripping the oil company of vital equipment, vehicles, pumps and copper wiring, carrying off whatever they can to make money. The double drain — of people and hardware — is further crippling a company that has been teetering for years yet remains the country’s most important source of income.

          The timing could not be worse for Venezuela’s increasingly authoritarian president, Nicolás Maduro, who was re-elected last month in a vote that has been widely condemned by leaders across the hemisphere. Prominent opposition politicians were either barred from competing in the election, imprisoned or in exile.

          But while Mr. Maduro has firm control over the country, Venezuela is on its knees economically, buckled by hyperinflation and a history of mismanagement. Widespread hunger, political strife, devastating shortages of medicine and an exodus of well over a million people in recent years have turned this country, once the economic envy of many of its neighbors, into a crisis that is spilling over international borders.

          If Mr. Maduro is going to find a way out of the mess, the key will be oil: virtually the only source of hard currency for a nation with the world’s largest estimated petroleum reserves. But each month Venezuela produces less of it. Offices at the state oil company are emptying out, crews in the field are at half strength, pickup trucks are stolen and vital materials vanish. All of this is adding to the severe problems at the company that were already acute because of corruption, poor maintenance, crippling debts, the loss of professionals and even a lack of spare parts.

    Now workers at all levels are walking away in large numbers, sometimes literally taking pieces of the company with them, union leaders, oil executives and workers say.

          A job with Petróleos de Venezuela, known as Pdvsa, used to be a ticket to the Venezuelan Dream. No more.

          Inflation in Venezuela is projected to reach an astounding 13,000 percent this year, according to the International Monetary Fund. When The New York Times interviewed Mr. Navas in May, the monthly salary for a worker like him was barely enough to buy a whole chicken or two pounds of beef. But with prices going up so quickly, it buys even less now.

          Junior Martínez, 28, who has worked in the oil industry for eight years, is assembling papers, including his diploma as a chemical engineer. His wife and her daughter left three months ago to earn money in Brazil. “I get 1,400,000 bolívars a week and it isn’t even enough to buy a carton of eggs or a tube of toothpaste,”Mr. Martínez said of his salary in bolívars, Venezuela’s currency.

          Mr. Martínez’s father, Ovidio Martínez, 55, recalled growing up here when the oil boom began. He cried as he spoke of his son’s determination to leave the country. “You watch your children leave and you can’t stop them,” the elder Mr. Martínez said, fighting back tears. “In this country, they don’t have a future.”

          In El Tigre, hundreds of people stood in line one recent morning outside a supermarket, many waiting since the evening before to buy whatever food they could.

                                             From: www.nytimes.com/June 14, 2018. Adapted.

    The wages received by workers are becoming worthless in Venezuela mainly because of the
    Escolha uma alternativa para a questão 17406bc0-cb
  • 173C7577-CB

    Inglês

    Interpretação de texto | Reading comprehension
    UECE · 2018DifícilEntre para guardar nos favoritos

                                               T E X T


          EL TIGRE, Venezuela — Thousands of workers are fleeing Venezuela’s state-owned oil company, abandoning once-coveted jobs made worthless by the worst inflation in the world. And now the hemorrhaging is threatening the nation’s chances of overcoming its long economic collapse.

          Desperate oil workers and criminals are also stripping the oil company of vital equipment, vehicles, pumps and copper wiring, carrying off whatever they can to make money. The double drain — of people and hardware — is further crippling a company that has been teetering for years yet remains the country’s most important source of income.

          The timing could not be worse for Venezuela’s increasingly authoritarian president, Nicolás Maduro, who was re-elected last month in a vote that has been widely condemned by leaders across the hemisphere. Prominent opposition politicians were either barred from competing in the election, imprisoned or in exile.

          But while Mr. Maduro has firm control over the country, Venezuela is on its knees economically, buckled by hyperinflation and a history of mismanagement. Widespread hunger, political strife, devastating shortages of medicine and an exodus of well over a million people in recent years have turned this country, once the economic envy of many of its neighbors, into a crisis that is spilling over international borders.

          If Mr. Maduro is going to find a way out of the mess, the key will be oil: virtually the only source of hard currency for a nation with the world’s largest estimated petroleum reserves. But each month Venezuela produces less of it. Offices at the state oil company are emptying out, crews in the field are at half strength, pickup trucks are stolen and vital materials vanish. All of this is adding to the severe problems at the company that were already acute because of corruption, poor maintenance, crippling debts, the loss of professionals and even a lack of spare parts.

    Now workers at all levels are walking away in large numbers, sometimes literally taking pieces of the company with them, union leaders, oil executives and workers say.

          A job with Petróleos de Venezuela, known as Pdvsa, used to be a ticket to the Venezuelan Dream. No more.

          Inflation in Venezuela is projected to reach an astounding 13,000 percent this year, according to the International Monetary Fund. When The New York Times interviewed Mr. Navas in May, the monthly salary for a worker like him was barely enough to buy a whole chicken or two pounds of beef. But with prices going up so quickly, it buys even less now.

          Junior Martínez, 28, who has worked in the oil industry for eight years, is assembling papers, including his diploma as a chemical engineer. His wife and her daughter left three months ago to earn money in Brazil. “I get 1,400,000 bolívars a week and it isn’t even enough to buy a carton of eggs or a tube of toothpaste,”Mr. Martínez said of his salary in bolívars, Venezuela’s currency.

          Mr. Martínez’s father, Ovidio Martínez, 55, recalled growing up here when the oil boom began. He cried as he spoke of his son’s determination to leave the country. “You watch your children leave and you can’t stop them,” the elder Mr. Martínez said, fighting back tears. “In this country, they don’t have a future.”

          In El Tigre, hundreds of people stood in line one recent morning outside a supermarket, many waiting since the evening before to buy whatever food they could.

                                             From: www.nytimes.com/June 14, 2018. Adapted.

    Because of the crisis Venezuela is going through, the text states that
    Escolha uma alternativa para a questão 173c7577-cb
  • 17389AC6-CB

    Inglês

    Interpretação de texto | Reading comprehension
    UECE · 2018MédioEntre para guardar nos favoritos

                                               T E X T


          EL TIGRE, Venezuela — Thousands of workers are fleeing Venezuela’s state-owned oil company, abandoning once-coveted jobs made worthless by the worst inflation in the world. And now the hemorrhaging is threatening the nation’s chances of overcoming its long economic collapse.

          Desperate oil workers and criminals are also stripping the oil company of vital equipment, vehicles, pumps and copper wiring, carrying off whatever they can to make money. The double drain — of people and hardware — is further crippling a company that has been teetering for years yet remains the country’s most important source of income.

          The timing could not be worse for Venezuela’s increasingly authoritarian president, Nicolás Maduro, who was re-elected last month in a vote that has been widely condemned by leaders across the hemisphere. Prominent opposition politicians were either barred from competing in the election, imprisoned or in exile.

          But while Mr. Maduro has firm control over the country, Venezuela is on its knees economically, buckled by hyperinflation and a history of mismanagement. Widespread hunger, political strife, devastating shortages of medicine and an exodus of well over a million people in recent years have turned this country, once the economic envy of many of its neighbors, into a crisis that is spilling over international borders.

          If Mr. Maduro is going to find a way out of the mess, the key will be oil: virtually the only source of hard currency for a nation with the world’s largest estimated petroleum reserves. But each month Venezuela produces less of it. Offices at the state oil company are emptying out, crews in the field are at half strength, pickup trucks are stolen and vital materials vanish. All of this is adding to the severe problems at the company that were already acute because of corruption, poor maintenance, crippling debts, the loss of professionals and even a lack of spare parts.

    Now workers at all levels are walking away in large numbers, sometimes literally taking pieces of the company with them, union leaders, oil executives and workers say.

          A job with Petróleos de Venezuela, known as Pdvsa, used to be a ticket to the Venezuelan Dream. No more.

          Inflation in Venezuela is projected to reach an astounding 13,000 percent this year, according to the International Monetary Fund. When The New York Times interviewed Mr. Navas in May, the monthly salary for a worker like him was barely enough to buy a whole chicken or two pounds of beef. But with prices going up so quickly, it buys even less now.

          Junior Martínez, 28, who has worked in the oil industry for eight years, is assembling papers, including his diploma as a chemical engineer. His wife and her daughter left three months ago to earn money in Brazil. “I get 1,400,000 bolívars a week and it isn’t even enough to buy a carton of eggs or a tube of toothpaste,”Mr. Martínez said of his salary in bolívars, Venezuela’s currency.

          Mr. Martínez’s father, Ovidio Martínez, 55, recalled growing up here when the oil boom began. He cried as he spoke of his son’s determination to leave the country. “You watch your children leave and you can’t stop them,” the elder Mr. Martínez said, fighting back tears. “In this country, they don’t have a future.”

          In El Tigre, hundreds of people stood in line one recent morning outside a supermarket, many waiting since the evening before to buy whatever food they could.

                                             From: www.nytimes.com/June 14, 2018. Adapted.

    The text mentions a twofold draining that is affecting Venezuela’s oil company, which includes
    Escolha uma alternativa para a questão 17389ac6-cb
  • 1734ADC2-CB

    Inglês

    Interpretação de texto | Reading comprehension
    UECE · 2018MédioEntre para guardar nos favoritos

                                               T E X T


          EL TIGRE, Venezuela — Thousands of workers are fleeing Venezuela’s state-owned oil company, abandoning once-coveted jobs made worthless by the worst inflation in the world. And now the hemorrhaging is threatening the nation’s chances of overcoming its long economic collapse.

          Desperate oil workers and criminals are also stripping the oil company of vital equipment, vehicles, pumps and copper wiring, carrying off whatever they can to make money. The double drain — of people and hardware — is further crippling a company that has been teetering for years yet remains the country’s most important source of income.

          The timing could not be worse for Venezuela’s increasingly authoritarian president, Nicolás Maduro, who was re-elected last month in a vote that has been widely condemned by leaders across the hemisphere. Prominent opposition politicians were either barred from competing in the election, imprisoned or in exile.

          But while Mr. Maduro has firm control over the country, Venezuela is on its knees economically, buckled by hyperinflation and a history of mismanagement. Widespread hunger, political strife, devastating shortages of medicine and an exodus of well over a million people in recent years have turned this country, once the economic envy of many of its neighbors, into a crisis that is spilling over international borders.

          If Mr. Maduro is going to find a way out of the mess, the key will be oil: virtually the only source of hard currency for a nation with the world’s largest estimated petroleum reserves. But each month Venezuela produces less of it. Offices at the state oil company are emptying out, crews in the field are at half strength, pickup trucks are stolen and vital materials vanish. All of this is adding to the severe problems at the company that were already acute because of corruption, poor maintenance, crippling debts, the loss of professionals and even a lack of spare parts.

    Now workers at all levels are walking away in large numbers, sometimes literally taking pieces of the company with them, union leaders, oil executives and workers say.

          A job with Petróleos de Venezuela, known as Pdvsa, used to be a ticket to the Venezuelan Dream. No more.

          Inflation in Venezuela is projected to reach an astounding 13,000 percent this year, according to the International Monetary Fund. When The New York Times interviewed Mr. Navas in May, the monthly salary for a worker like him was barely enough to buy a whole chicken or two pounds of beef. But with prices going up so quickly, it buys even less now.

          Junior Martínez, 28, who has worked in the oil industry for eight years, is assembling papers, including his diploma as a chemical engineer. His wife and her daughter left three months ago to earn money in Brazil. “I get 1,400,000 bolívars a week and it isn’t even enough to buy a carton of eggs or a tube of toothpaste,”Mr. Martínez said of his salary in bolívars, Venezuela’s currency.

          Mr. Martínez’s father, Ovidio Martínez, 55, recalled growing up here when the oil boom began. He cried as he spoke of his son’s determination to leave the country. “You watch your children leave and you can’t stop them,” the elder Mr. Martínez said, fighting back tears. “In this country, they don’t have a future.”

          In El Tigre, hundreds of people stood in line one recent morning outside a supermarket, many waiting since the evening before to buy whatever food they could.

                                             From: www.nytimes.com/June 14, 2018. Adapted.

    According to the text, despite all the problems that Venezuela’s state-owned oil company is going through, it is still
    Escolha uma alternativa para a questão 1734adc2-cb
  • 1731431F-CB

    Biologia

    Briófitas e Pteridófitas
    UECE · 2018FácilEntre para guardar nos favoritos

    Leia atentamente a seguinte descrição: Organismos deste filo avascular compartilham algumas características com as plantas vasculares, tais como: camada de células estéreis na parede dos gametângios e dos esporângios; retenção do embrião dentro do gametófito feminino; esporófito diploide resultante da fecundação; e esporos com esporopolenina.


    O enunciado acima descreve o filo denominado de

    Escolha uma alternativa para a questão 1731431f-cb
  • 172D69DA-CB

    Biologia

    Identidade dos seres vivos
    UECE · 2018FácilEntre para guardar nos favoritos

    Atente ao seguinte excerto: “... Em ambientes com déficit hídrico, a obtenção de água é fator crucial para o crescimento e desenvolvimento das plantas... Assim, a hidrofilia da superfície foliar pode favorecer a absorção hídrica, especialmente pela absorção de orvalho que se forma na madrugada. Em Combretum leprosum, um arbusto nativo do nordeste brasileiro, ocorrem tricomas foliares hidrofílicos...”.

    Fonte: http://www.periodicos.ufc.br/eu/article/view/17977/26335


    Considerando o excerto acima, é correto afirmar que hidrofilia se refere à

    Escolha uma alternativa para a questão 172d69da-cb
  • 1729D033-CB

    Biologia

    Identidade dos seres vivos
    UECE · 2018DifícilEntre para guardar nos favoritos

    Atente ao que se diz a seguir sobre hormônios animais, e assinale com V o que for verdadeiro e com F o que for falso.


    ( ) São mensageiros químicos produzidos em pequenas quantidades e distribuídos pelo sistema circulatório.

    ( ) Controlam respostas fisiológicas a curto prazo, tais como secreção de enzimas digestivas e ciclo reprodutivo.

    ( ) São sinais químicos produzidos por células de um organismo unicelular conhecidas como células endócrinas.

    ( ) São usados para controlar ações a longo prazo, porque a secreção, a difusão e a circulação são mais lentas do que a transmissão.


    A sequência correta, de cima para baixo, é:

    Escolha uma alternativa para a questão 1729d033-cb
  • 1725D004-CB

    Biologia

    Identidade dos seres vivos
    UECE · 2018Muito fácilEntre para guardar nos favoritos

    Atente para a seguinte notícia “A Secretaria da Saúde do Ceará (Sesa) confirmou três mortes e sete casos de gripe H1N1 no Ceará. A doença pode causar febres de até 40º.” (16/04/2018)

    Fonte: https://www.opovo.com.br/noticias/saude/2018/04/confirma dos-30-casos-de-h1n1-em-fortaleza.html


    No que diz respeito à gripe H1N1, é correto afirmar que

    Escolha uma alternativa para a questão 1725d004-cb
  • 17154985-CB

    Biologia

    Dinâmica de populações
    UECE · 2018MédioEntre para guardar nos favoritos

    Em relação à dinâmica de populações, escreva V ou F conforme seja verdadeiro ou falso o que se afirma nos itens abaixo.


    ( ) A densidade populacional é definida como o número de indivíduos presentes na comunidade que vive em determinada área ou volume.

    ( ) A curva de crescimento populacional real resulta da interação entre seu potencial biológico e a resistência ambiental.

    ( ) Qualquer população pode apresentar crescimento exponencial, independente do meio em que vive.

    ( ) A capacidade de carga ou resistência ambiental, a competição e a densidade populacional são exemplos de fatores que regulam o crescimento populacional.


    Está correta, de cima para baixo, a seguinte sequência:

    Escolha uma alternativa para a questão 17154985-cb
  • 1711CF1D-CB

    Química

    Grandezas: massa, volume, mol, massa molar, constante de Avogadro e Estequiometria.
    UECE · 2018FácilEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Grandezas: massa, volume, mol, massa molar, constante de Avogadro e Estequiometria.

    Um estudante encontrou, no laboratório, um frasco que continha uma solução 3,0 M de certo hidróxido cujo nome não constava no rótulo, que apresentava poucas indicações do conteúdo. Usando 200 mL dessa solução e evaporando todo o líquido, ele obteve 33,6 g de hidróxido de
    Escolha uma alternativa para a questão 1711cf1d-cb
  • 170D0ED5-CB

    Química

    Termoquímica: Energia Calorífica, Calor de reação, Entalpia, Equações e Lei de Hess.
    UECE · 2018MédioEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Termoquímica: Energia Calorífica, Calor de reação, Entalpia, Equações e Lei de Hess.

    O propanotriol, presente em alimentos industrializados, é também usado como umectante, solvente e amaciante. Utilizando-se a constante ebulioscópica da água 0,512 cal/m, é correto afirmar que o ponto de ebulição de 18,4 g de propanotriol dissolvidos em 500 g de água é, aproximadamente,
    Escolha uma alternativa para a questão 170d0ed5-cb
  • 17087925-CB

    Química

    Fórmulas, Balanceamento e Leis ponderais das reações químicas
    UECE · 2018MédioEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Fórmulas, Balanceamento e Leis ponderais das reações químicas

    A fórmula empírica de um composto orgânico derivado de alcano, usado como propelente e herbicida, que apresenta em massa a seguinte composição: 23,8% de C; 5,9 % de H e 70,3% de Cℓ, é
    Escolha uma alternativa para a questão 17087925-cb
  • 1704BEF7-CB

    Química

    Fórmulas, Balanceamento e Leis ponderais das reações químicas
    UECE · 2018MédioEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Fórmulas, Balanceamento e Leis ponderais das reações químicas

    Considerando as semirreações

    BiO3- + 6H+ + 2e- → Bi3+ + 3H2O e  Mn2+ + 4H2O → MnO4- + 8H+ + 5e- , é correto afirmar que o coeficiente do íon MnO4- na reação global devidamente balanceada é

    Escolha uma alternativa para a questão 1704bef7-cb
  • 1700B43B-CB

    Química

    Principais Funções Orgânicas: Funções Oxigenadas: Álcool, Fenol e Enol.
    UECE · 2018FácilEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Principais Funções Orgânicas: Funções Oxigenadas: Álcool, Fenol e Enol.

    O éter dietílico (etoxietano) é uma substância líquida volátil e altamente inflamável. Utilizado inicialmente como anestésico, seu uso foi descontinuado pelo risco de explosão. Atualmente serve como ótimo solvente para experiências químicas em laboratórios. Este composto orgânico é isômero de um álcool primário de cadeia não ramificada, cujo nome é
    Escolha uma alternativa para a questão 1700b43b-cb
  • 16FC9DCE-CB

    Química

    Glicídios, Lipídios, Aminoácidos e Proteínas.
    UECE · 2018MédioEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Glicídios, Lipídios, Aminoácidos e Proteínas.

    O ácido butanoico tem um odor dos mais desagradáveis: está presente na manteiga rançosa, no cheiro de suor e no chulé. No entanto, ao reagir com etanol, forma o agradável aroma de abacaxi. Assinale a opção que apresenta corretamente o composto responsável por esse aroma e a respectiva função orgânica a que pertence.
    Escolha uma alternativa para a questão 16fc9dce-cb
  • 16F87925-CB

    Química

    Cadeias Carbônicas: Características e Classificações do Átomo do Carbono, Tipos de Ligação e Hibridação. Tipos de Cadeias Carbônicas e Fórmulas. Séries: Homóloga, Isóloga e Heteróloga.
    UECE · 2018MédioEntre para guardar nos favoritos

                   Figura 1 de 2 da questão de Química, UECE 2018, Cadeias Carbônicas: Características e Classificações do Átomo do Carbono, Tipos de Ligação e Hibridação. Tipos de Cadeias Carbônicas e Fórmulas. Séries: Homóloga, Isóloga e Heteróloga.

    A coniina é um alcaloide venenoso. Suas propriedades tóxicas eram conhecidas desde a antiguidade e já eram usadas na época dos gregos como um veneno para ser administrado àqueles condenados à morte.


    Figura 2 de 2 da questão de Química, UECE 2018, Cadeias Carbônicas: Características e Classificações do Átomo do Carbono, Tipos de Ligação e Hibridação. Tipos de Cadeias Carbônicas e Fórmulas. Séries: Homóloga, Isóloga e Heteróloga.


    Atente ao que se diz a seguir sobre essa substância:


    I. Contém carbono terciário.

    II. É um composto aromático.

    III. É um composto nitrogenado heterocíclico.

    IV. Tem fórmula molecular C8H17N.


    Está correto o que se afirma somente em

    Escolha uma alternativa para a questão 16f87925-cb
  • 16F40312-CB

    Química

    Fórmulas, Balanceamento e Leis ponderais das reações químicas
    UECE · 2018MédioEntre para guardar nos favoritos

                   Imagem da questão de Química, UECE 2018, Fórmulas, Balanceamento e Leis ponderais das reações químicas

    Na neutralização do excesso de ácido clorídrico estomacal por meio do produto chamado “leite de magnésia” (hidróxido de magnésio + água), um hidroxissal pode ser formado. Assinale a opção que apresenta corretamente a formação do hidroxissal e seu respectivo nome.
    Escolha uma alternativa para a questão 16f40312-cb