(UNESP) Os microplásticos representam aproximadamente 92,4% da contagem global de partículas de lixo plástico. Estes pequenos plásticos de até 5 mm de tamanho estão entrando no ambiente marinho, contaminando um sistema já vulnerável.

(www.arocha.org. Adaptado.)

Os mexilhões estão entre os invertebrados marinhos diretamente afetados pela presença de partículas de microplásticos nas águas, uma vez que, para se alimentarem,

THE FLAT EARTH CRUISE: SERIOUSLY, PEOPLE?

Organizers of an annual conference that brings together people who believe that our planet is not

round are planning a cruise to the supposed edge of the Earth. They’re looking for the ice wall that

holds back the oceans.

The journey will take place in 2020, the Flat Earth International Conference (FEIC) recently

[5] announced on its website. The goal? To test so-called flat-Earthers’ assertion that the Earth is a

flattened disk surrounded at its edge by a towering wall of ice.

Details about the event, including the dates, are forthcoming, according to the FEIC, which calls

the cruise “the biggest, boldest adventure yet”. However, it’s worth noting that nautical maps and

navigation technologies such as global positioning systems (GPS) work as they do because the

[10] Earth is … a globe.

Believers in a flat Earth argue that images showing a curved horizon are fake and that photos of a

round Earth from space are part of a vast conspiracy perpetrated by NASA and other space agencies

to hide Earth’s flatness. “This likely began during the cold war”, the Flat Earth Society (FES) says.

“The U.S.S.R. and U.S.A. were obsessed with beating each other into space to the point that each

[15] faked their accomplishments in an attempt to keep pace with the other’s supposed achievements.”

These and other flat-Earth assertions appear on the website of the FES, allegedly the world’s oldest

official flat Earth organization, dating to the early 1800s.

However, the ancient Greeks demonstrated that Earth was a sphere more than 2.000 years ago,

and the gravity that keeps everything on the planet from flying off into space could exist only on a

[20] spherical world.

But in diagrams shared on the FES website, the planet appears as a pancake-like disk with the

North Pole smacked in the center and an edge “surrounded on all sides by an ice wall that holds

the oceans back”. This ice wall – thought by some flat-Earthers to be Antarctica – is the destination

of the promised FEIC cruise.

[25] There’s just one catch: navigational charts and systems that guide cruise ships and other vessels

around the Earth’s oceans are all based on the principle of a round Earth, says Henk Keijer, a

former cruise ship captain with 23 years of experience.

GPS relies on a network of dozens of satellites orbiting thousands of miles above Earth; signals

from the satellites beam down to the receiver inside of a GPS device, and at least three satellites are

[30] required to pinpoint a precise position because of Earth’s curvature, Keijer explained. “Had the

Earth been flat, a total of three satellites would have been enough to provide this information to

everyone on Earth”. He adds: “But it is not enough, because the Earth is round”.

Whether or not, the FEIC cruise will rely on GPS or deploy an entirely new flat-Earth-based

navigation system for finding the end of the world remains to be seen.

Adaptado de livescience.com, 30/05/2017.

These and other flat-Earth assertions appear on the website of the FES, allegedly the world’s oldest official flat Earth organization, dating to the early 1800s. (l. 16-17)

In relation to the fragment above, the pieces of information introduced in the fifth paragraph (l. 18-20) serve the following purpose:

Dois números reais de 0 a 4, e que podem ser iguais, serão sorteados ao acaso. Denotando-se esses números por x e y, a probabilidade de que eles sejam tais que x2 + y2 ≤ 1 é igual a

(UNIFEI) À medida que crescem a população e as cidades, ocorre também uma crescente demanda pela água, que é utilizada de diversas formas, como no uso doméstico, nas indústrias, na agricultura e pecuária. Com relação à demanda de água, assinale a alternativa que mostra onde a água é requerida em maior quantidade.

Leia o trecho a seguir.

Você estudou sobre curiosidades de crianças que moram em várias partes do mundo: Marvel que mora no Alaska; anda de trenó puxado por cães e usa óculos escuros.

Frida na Hungria: frequenta concertos musicais na capital.

Yong Woo na Coréia: Come baratinha frita no cinema, em vez de pipoca.

Sika em Angola: usa colares de contas coloridas que indicam a sua idade.

Agora, escreva duas curiosidades culturais diferentes da cultura da criança brasileira.