Português
- Sintaxe
- Prova de 2022
- CEDERJ
- Dificuldade: Difícil
- Com imagem
- Código da questão: 44F80609-DF

Instituição
1.157 questões de Centro de Educação Superior a Distância do Estado do Rio de Janeiro (CEDERJ), de 2006 a 2025. Cada uma tem página própria, com enunciado completo, alternativas e gabarito — e dá para responder na própria página.

TEXT 3
A pandemic of change?
Many researchers and wildlife organizations are urging scientists to use this unprecedented time for a close examination of the impact of human activity on the natural world. They argue that the information that researchers gather during this time could help improve conservation and biodiversity efforts.
It may also improve their ability to predict global environmental changes and potential cases of zoonoses, the transmission of disease from animals to humans. This could save millions of human lives, and economic losses, going forward.
Realistically, it will take years to assess exactly how the COVID-19 pandemic has affected wildlife, the environment, and the climate. Moreover, the impact of the pandemic on the natural world is unlikely to be linear. Research suggests that a reduction in some pollutants, including nitrogen oxides, may result in the rise of others, such as ozone.
Understanding how this pandemic has changed humans’ relationship with nature may be just as complex. But for now, these positive changes may be enough to give some people, and Mother Nature, the hope of a better future.
Avaiable from: <https://www.medicalnewstoday.com/articles/how-covid-19-has-changed-the-face-of-the-natural-world#A-pandemic-of-change?> Access: 10 Oct. 2021. Adapted.
Uma amostra de uma rocha de massa 0.250 g, com baixo teor de Cr, foi submetida à fusão com Na2O2 transformando o cromo em cromato (CrO4 = ). A amostra foi dissolvida em água em ebulição, acidificada e o CrO4 = foi convertido a dicromato (Cr2O7 = ). Na sequência, a amostra foi titulada com 27 mL de solução de Fe2+. Os produtos desta reação foram Fe3+ e Cr3+. Numa padronização paralela, 47 mL de Fe2+ foram usados na redução de 0.1172 g de K2Cr2O7. A reação decorrente foi:
Cr2O7 = + 6Fe2+ + 14H+ → 2Cr3+ + 6Fe3+ + 7H2O.
A massa percentual de Cr na amostra é:
Um ciclista pedala sua bicicleta ao longo de uma linha reta, para frente, com velocidade constante, contra o vento, sobre uma pista plana horizontal.
A força que a pista exerce na bicicleta pode ser decomposta em uma parcela horizontal de atrito H e uma parcela vertical V.
Diante dos dados apresentados, é correto afirmar que
A doença Covid-19 é causada pelo coronavírus (SARS-CoV-2) e foi descrita em 2019. A Organização Mundial de Saúde (OMS) recomenda a vacinação para proteção da população contra esse vírus. No Brasil, existem 4 tipos de vacinas, com suas eficácias comprovadas, autorizadas pela Agência Nacional de Vigilância Sanitária (ANVISA) para serem aplicadas na população. Essas vacinas são fabricadas utilizando 4 diferentes técnicas com vírus inativado, RNA mensageiro, adenovírus como vetor viral e proteína subunitária.
Dentre as técnicas citadas, aquela que apresenta na sua composição o ácido desoxirribonucleico é a vacina



Estamos vivenciando a consolidação de uma nova estrutura econômico-social, profundamente ligada à tecnologia: a sociedade da informação - também denominada “sociedade do conhecimento” por Bernardo Sorj (2003) e “Era da pós-informação” por Nicholas Negroponte (1995).
(Adaptado. Disponível em: http://www.observatoriodaimprensa.com.br/ enoticias/exclusao-digital-e-o-maior-obstaculo/. Acesso em 12/05/2020)
O principal fator que pode contribuir para o domínio da tecnologia, com a maior capacidade de tirar o máximo proveito das potencialidades oferecidas por cada instrumento de comunicação e informação, é:

Big Tech made the social media mess. It has to fix it
Analysis by David Goldman, CNN Business
Social media has given people a platform to spew hate speech and radical beliefs to other people, amplifying what are otherwise fringe opinions. A few have turned that hate into violence.
Silicon Valley has built the biggest, most powerful companies in the world. Now, tech leaders have a responsibility to rein in the creations that have grown too unwieldy for them to control.
These are businesses, and their leaders will have to And out how to do that without destroying their companies. So far, balancing Big Tech's responsibilities to society and its duties to investors has proven difficult.
A difficult balance
Facebook (FB) announced in July it would invest billions of dollars a year to improve safety and security on the platform. The company said the effort would come at the expense of user growth and profitability. The company's stock lost about a third of its value because investors were concerned about Facebook's growth stalling.
Twitter has largely rid ISIS recruiters from the social network. Facebook and YouTube have labeled fake news stories as such. Yet, the work isn't close to done. Google has also made significant changes to YouTube's advertising policies after ads from 300 companies and organizations ran on channels promoting hate groups.
"YouTube has strict policies that prohibit content which incites others to violence or promotes hatred," a YouTube spokesperson said. "We quickly remove videos violating our policies when flagged by our users."
What seemed to cross no one's mind a decade ago was the potential downside to building a platform with billions of customers. So many posts can't possibly be monitored in real time. The networks gave the dregs of society the ability to reach like-minded people and poison the minds of others.
Without that foresight, Silicon Valley allowed their creations to break down. They're not beyond repair, but fixing them will be costly and difficult. Whether Big Tech is up to the task will determine the fates of their platforms.
Available: https://edition.cnn.com/2018/10/29/tech/social-media- -hate-speech/index.html. Access: 30 may 2019. Adapted.
Glossary: spew: lançar; fringe: periféricas; to rein in: controlar; unwieldy: desordenado; duties: deveres; profitability, lucro;
stock: ação (no mercado); stalling: interrupção; flagged: sinalizados; dregs of society: pessoas inescrupulosas; like-minded: pessoas que compartilham ideias semelhantes; poison: envenenar;
foresight: visão; beyond repair: sem conserto; up to the task: à
altura da tarefa.
Big Tech made the social media mess. It has to fix it
Analysis by David Goldman, CNN Business
Social media has given people a platform to spew hate speech and radical beliefs to other people, amplifying what are otherwise fringe opinions. A few have turned that hate into violence.
Silicon Valley has built the biggest, most powerful companies in the world. Now, tech leaders have a responsibility to rein in the creations that have grown too unwieldy for them to control.
These are businesses, and their leaders will have to And out how to do that without destroying their companies. So far, balancing Big Tech's responsibilities to society and its duties to investors has proven difficult.
A difficult balance
Facebook (FB) announced in July it would invest billions of dollars a year to improve safety and security on the platform. The company said the effort would come at the expense of user growth and profitability. The company's stock lost about a third of its value because investors were concerned about Facebook's growth stalling.
Twitter has largely rid ISIS recruiters from the social network. Facebook and YouTube have labeled fake news stories as such. Yet, the work isn't close to done. Google has also made significant changes to YouTube's advertising policies after ads from 300 companies and organizations ran on channels promoting hate groups.
"YouTube has strict policies that prohibit content which incites others to violence or promotes hatred," a YouTube spokesperson said. "We quickly remove videos violating our policies when flagged by our users."
What seemed to cross no one's mind a decade ago was the potential downside to building a platform with billions of customers. So many posts can't possibly be monitored in real time. The networks gave the dregs of society the ability to reach like-minded people and poison the minds of others.
Without that foresight, Silicon Valley allowed their creations to break down. They're not beyond repair, but fixing them will be costly and difficult. Whether Big Tech is up to the task will determine the fates of their platforms.
Available: https://edition.cnn.com/2018/10/29/tech/social-media- -hate-speech/index.html. Access: 30 may 2019. Adapted.
Glossary: spew: lançar; fringe: periféricas; to rein in: controlar; unwieldy: desordenado; duties: deveres; profitability, lucro;
stock: ação (no mercado); stalling: interrupção; flagged: sinalizados; dregs of society: pessoas inescrupulosas; like-minded: pessoas que compartilham ideias semelhantes; poison: envenenar;
foresight: visão; beyond repair: sem conserto; up to the task: à
altura da tarefa.
Big Tech made the social media mess. It has to fix it
Analysis by David Goldman, CNN Business
Social media has given people a platform to spew hate speech and radical beliefs to other people, amplifying what are otherwise fringe opinions. A few have turned that hate into violence.
Silicon Valley has built the biggest, most powerful companies in the world. Now, tech leaders have a responsibility to rein in the creations that have grown too unwieldy for them to control.
These are businesses, and their leaders will have to And out how to do that without destroying their companies. So far, balancing Big Tech's responsibilities to society and its duties to investors has proven difficult.
A difficult balance
Facebook (FB) announced in July it would invest billions of dollars a year to improve safety and security on the platform. The company said the effort would come at the expense of user growth and profitability. The company's stock lost about a third of its value because investors were concerned about Facebook's growth stalling.
Twitter has largely rid ISIS recruiters from the social network. Facebook and YouTube have labeled fake news stories as such. Yet, the work isn't close to done. Google has also made significant changes to YouTube's advertising policies after ads from 300 companies and organizations ran on channels promoting hate groups.
"YouTube has strict policies that prohibit content which incites others to violence or promotes hatred," a YouTube spokesperson said. "We quickly remove videos violating our policies when flagged by our users."
What seemed to cross no one's mind a decade ago was the potential downside to building a platform with billions of customers. So many posts can't possibly be monitored in real time. The networks gave the dregs of society the ability to reach like-minded people and poison the minds of others.
Without that foresight, Silicon Valley allowed their creations to break down. They're not beyond repair, but fixing them will be costly and difficult. Whether Big Tech is up to the task will determine the fates of their platforms.
Available: https://edition.cnn.com/2018/10/29/tech/social-media- -hate-speech/index.html. Access: 30 may 2019. Adapted.
Glossary: spew: lançar; fringe: periféricas; to rein in: controlar; unwieldy: desordenado; duties: deveres; profitability, lucro;
stock: ação (no mercado); stalling: interrupção; flagged: sinalizados; dregs of society: pessoas inescrupulosas; like-minded: pessoas que compartilham ideias semelhantes; poison: envenenar;
foresight: visão; beyond repair: sem conserto; up to the task: à
altura da tarefa.